Revision as of 16:21, 15 April 2021

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Main Article: Building Character Sheets

Learning CSS and HTML can be daunting. And yet, if you want to create a character sheet for Roll20, both are required.

This page gives a number of examples for creative way to leverage the character sheet system. Most of these tips involve CSS and were pulled from the CSS Wizardry thread in the Character Sheets forum, but some tips don't necessarily involve CSS at all.

These tips & examples are made to work with Legacy Sheet, so need adjustments to work with newer CSE-sheets. See the Character Sheet Enhancement-page for more info. Andreas J. (talk) 16:21, 15 April 2021 (UTC)

Many of these tips also include links to a live demo on JSFiddle, so you can see them in action.

For other pages related to CSS & Design for Roll20 character sheets, see:

• Designing Character Sheet Layout - tips on how to best design the broad strokes of a character sheet
• Image use in character sheets - How to include images on your character sheets
• Sheet Design Best Practices

Show/Hide Areas

Common mistake:: Not understanding how General Sibling Selector ~ works, and how it applies in making tabs/hideable areas on the sheet. The examples on show/hide areas & creating tabs relies on the correct positioning of elements, and if the html elements are thrown in a different order or withing other elements, the conditions aren't met for things to trigger.

Live Demo

You can show or hide areas on the character sheet based on the state of a checkbox. Instead of the adjacent sibling selector (+) used by custom checkboxes, you should use the sibling selector (~).

On the 'toggle-show' checkbox, the following 'body' is hidden when the toggle is not checked.

On the 'toggle-hide' checkbox, the following 'body' is hidden when the toggle is checked.

<div class="sheet-columns">
  <div>
      <input type="checkbox" class="sheet-toggle-show" />
      <span>Show</span>
      <div class="sheet-body">You found me!</div>
  </div>
  <div>
      <input type="checkbox" class="sheet-toggle-hide" />
      <span>Hide</span>
      <div class="sheet-body">Hey, a little privacy here?!</div>
  </div>
</div>

.sheet-columns {
  display: flex;
  justify-content: space-between;
  width: 400px;
}
.sheet-columns > * {
  flex: 1;
}

input.sheet-toggle-show:not(:checked) ~ div.sheet-body,
input.sheet-toggle-hide:checked ~ div.sheet-body {
    display: none;
}

Swap Visible Areas

Live Demo

You can apply the hide areas logic to multiple elements based on the same checkbox, and get swappable behavior:

<div>
  <input type="checkbox" class="sheet-block-switch" name="attr_block_switch" value="1">
  <div class="sheet-block-a">
    Lorem ipsum dolor sit amet
  </div>
  <div class="sheet-block-b">
    consectetur adipiscing elit
  </div>
</div>

.sheet-block-a,
.sheet-block-switch:checked ~ .sheet-block-b {
  display: block;
}

.sheet-block-b,
.sheet-block-switch:checked ~ .sheet-block-a {
  display: none;
}

Tabs

Many paper-versions of character sheets have more than one page, and among the best ways to implement this in Roll20 sheets is to create tabs for each page, swapping the visible area with some form of buttons. The following examples are the main two ways this can be done, where the first one is more streamlined than the older example, and is using much more of an modern approach, leading to less problems on older/less used browsers.

Button-based tabs

This is a short and simple example of implementing tabs on a character sheet using action buttons and sheetworkers, created by Finderski & GiGs.

<div>
    <button type="action" name="act_character" >Character</button>
    <button type="action" name="act_journal" >Journal</button>
    <button type="action" name="act_configuration" >Configuration</button>
</div>
<input type='hidden' class='sheet-tabstoggle' name='attr_sheetTab'  value='character'  />

<div class='sheet-character'>
    <h2>Character</h2>
    <span>character Stuff Goes here </span>
</div>
<div class='sheet-journal'>
    <h2>Journal/Notes</h2>
    <span>Journal/Notes Stuff Goes here</span> 
</div>
<div class='sheet-config'>
    <h2>Config/Settings</h2>
    <span>Sheet Config/Settings goes here</span> 
</div>

<script type="text/worker">
    const buttonlist = ["character","journal","configuration"];
    buttonlist.forEach(button => {
        on(`clicked:${button}`, function() {
            setAttrs({
                sheetTab: button
            });
        });
    });
</script>

/*Configure the tab buttons*/
.sheet-character,
.sheet-config,
.sheet-journal {
	display: none;
}

/* show the selected tab */
.sheet-tabstoggle[value="character"] ~ div.sheet-character,
.sheet-tabstoggle[value="configuration"] ~ div.sheet-config,
.sheet-tabstoggle[value="journal"] ~ div.sheet-journal {
	display: block;
}

Old Tab Example (invisible radio input + span)

Note: This example/method of creating tabs on a character sheet does not work out of the box, contains lots of unnecessary code, and is far less intuitive than the new tab example. This example is generally not recommended to use, but is left here just for the sake of continuity, and those who might need troubleshoot their implementation. Ambition & Avarice and Hc Svnt Dracones 2E are two sheets that base their tabs on this example, and both needed manual adjustment on at least the position of the tabs to actually work.

Old sheets with bad tabs: Lastly, a number of older sheet's using a variation of this older "input + span"-method don't render correctly on Firefox, and instead shows just the larger radio buttons but doesn't show the name of the tab. These currently broken tab-implementations could be changed to use either this working version of the "input + span"-method or to the newer "action button" example.

<input type="radio" name="attr_tab" class="sheet-tab sheet-tab1" value="1" checked="checked"><span title="First Tab"></span>
<input type="radio" name="attr_tab" class="sheet-tab sheet-tab2" value="2"><span title="Second Tab"></span>
<input type="radio" name="attr_tab" class="sheet-tab sheet-tab3" value="3"><span title="Third Tab"></span>
<input type="radio" name="attr_tab" class="sheet-tab sheet-tab4" value="4"><span title="Fourth Tab"></span>

<div class="sheet-tab-content sheet-tab1">
    <h1>Tab 1</h1>
    Lorem ipsum dolor sit amet
</div>

<div class="sheet-tab-content sheet-tab2">
    <h1>Tab the Second</h1>
    consectetur adipisicing elit
</div>

<div class="sheet-tab-content sheet-tab3">
    <h1>3rd Tab</h1>
    sed do eiusmod tempor incididunt ut labore et dolore magna aliqua
</div>

<div class="sheet-tab-content sheet-tab4">
    <h1>Fourth Tab</h1>
    Ut enim ad minim veniam
</div>

div.sheet-tab-content { display: none; }

input.sheet-tab1:checked ~ div.sheet-tab1,
input.sheet-tab2:checked ~ div.sheet-tab2,
input.sheet-tab3:checked ~ div.sheet-tab3,
input.sheet-tab4:checked ~ div.sheet-tab4 { display: block; }

input.sheet-tab {
    width: 150px;
    height: 20px;
    position: relative;
    top: 5px;
    left: 6px;
    margin: -1.5px;
    cursor: pointer;
    z-index: 1;
    opacity: 0;
}

input.sheet-tab + span::before {
    content: attr(title);
    border: solid 1px #a8a8a8;
    border-bottom-color: black;
    text-align: center;
    display: inline-block;
    background: #fff;
    background: linear-gradient(to top, #c8c8c8, #fff, #c8c8c8);
    width: 150px;
    height: 20px;
    font-size: 18px;
    position: absolute;
    top: 12px;
    left: 13px;
}

input.sheet-tab:checked + span::before {
    background: #dcdcdc;
    background: linear-gradient(to top, #fcfcfc, #dcdcdc, #fcfcfc);
    border-bottom-color: #fff;
}

input.sheet-tab:not(:first-child) + span::before { border-left: none; }

input.sheet-tab2 + span::before {
    background: #fee;
    background: linear-gradient(to top, #f8c8c8, #fee, #f8c8c8);
    left: 163px;
}

input.sheet-tab2:checked + span::before {
    background: #dcdcdc;
    background: linear-gradient(to top, #fcecec, #f8c8c8, #fcecec);
    border-bottom-color: #fcecec;
}

input.sheet-tab3 + span::before { left: 313px; }

input.sheet-tab4 + span::before { left: 463px; }

div.sheet-tab-content {
    border: 1px solid #a8a8a8;
    border-top-color: #000;
    margin: 2px 0 0 5px;
    padding: 5px;
}

div.sheet-tab2 { background-color: #fcecec; }

Cycling Button

It's sometimes useful to have a single control(like button/radio input) that the user can click on to cycle through a series of values/options, instead of creating a <select>-dropdown.

<div class="sheet-damage-box">
    <input type="radio" class="sheet-damage-box sheet-no-damage" name="attr_damage-box" value="0" checked>
    <input type="radio" class="sheet-damage-box sheet-bashing-damage" name="attr_damage-box" value="1">
    <input type="radio" class="sheet-damage-box sheet-lethal-damage" name="attr_damage-box" value="2">
    <input type="radio" class="sheet-damage-box sheet-aggravated-damage" name="attr_damage-box" value="3">

    <span class="sheet-damage-box sheet-no-damage">☐ (no damage)</span>
    <span class="sheet-damage-box sheet-bashing-damage">&nbsp;/&nbsp; (bashing damage)</span>
    <span class="sheet-damage-box sheet-lethal-damage">☓ (lethal damage)</span>
    <span class="sheet-damage-box sheet-aggravated-damage">✱ (aggravated damage)</span>
</div>

div.sheet-damage-box {
    width: 195px;
    height: 30px;
    position: relative;
}

input.sheet-damage-box {
    width: 30px;
    height: 30px;
    position: absolute;
    z-index: 1;
}

span.sheet-damage-box {
    margin: 10px 0 0 40px;
    display: none;
}

input.sheet-no-damage { z-index: 2; }

input.sheet-no-damage:checked + input.sheet-bashing-damage,
input.sheet-bashing-damage:checked + input.sheet-lethal-damage,
input.sheet-lethal-damage:checked + input.sheet-aggravated-damage { z-index: 3; }

input.sheet-no-damage:checked ~ span.sheet-no-damage,
input.sheet-bashing-damage:checked ~ span.sheet-bashing-damage,
input.sheet-lethal-damage:checked ~ span.sheet-lethal-damage,
input.sheet-aggravated-damage:checked ~ span.sheet-aggravated-damage { display: inline-block; }

This uses the same approach described in Checkbox and Radio Input Styling: it uses a hidden attribute to store the value and a styled input/button to update the value.

This trick is used on multiple WoD sheets to cycle through showing different types of damage symbols in their health boxes.

The key distinction here is incrementing the numeric value by 1 each time the button is clicked and using the Modulo Operator to cycle the value back to 0 once it reaches 4. This makes it cycle through 0, 1, 2, and 3 before going back to 0.

<div>
  <input type="hidden" name="attr_health_1" class="health" value="0" />
  <button type="action" name="act_health_1_cycle" class="health"></button>

  <span class="no-damage">☐ (no damage)</span>
  <span class="bashing-damage"> /  (bashing damage)</span>
  <span class="lethal-damage">☓ (lethal damage)</span>
  <span class="aggravated-damage">✱ (aggravated damage)</span>
</div>
<script type="text/worker">
  on(`clicked:health_1_cycle`, () => {
      // Check the current value of the hidden attribute.
    getAttrs(["health_1"], (v) => {
      const healthValue = parseInt(v["health_1"]) || 0;
      // Increment the attribute value by 1, or cycle back to 0 if the incremented value is equal to 4.
      setAttrs({
        "health_1": (healthValue + 1) % 4
      });
    });
  });
</script>

/* Configure the button styling. This example makes it look like a checkbox. */
button.sheet-health {
  width: 10px;
  height: 10px;
  padding: 0;
  border: solid 1px #000000;
  background: #efefef;
}

/* Draw a diagonal slash if the hidden attribute value is "1" */
input.sheet-health[value="1" + button.sheet-health {
  background:
    linear-gradient(to top left,
      #efefef 0%,
      #efefef calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      #efefef calc(50% + 0.8px),
      #efefef 100%);
}
/* Draw two diagonal slashes if the hidden attribute value is "2" */
input.sheet-health[value="2" + button.sheet-health {
  background:
    linear-gradient(to top left,
      rgba(0,0,0,0) 0%,
      rgba(0,0,0,0) calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      rgba(0,0,0,0) calc(50% + 0.8px),
      rgba(0,0,0,0) 100%),
    linear-gradient(to top right,
      #efefef 0%,
      #efefef calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      #efefef calc(50% + 0.8px),
      #efefef 100%);
}
/* Draw three diagonal slashes if the hidden attribute value is "3" */
input.sheet-health[value="3" + button.sheet-health {
  background:
    linear-gradient(to top left,
      rgba(0,0,0,0) 0%,
      rgba(0,0,0,0) calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      rgba(0,0,0,0) calc(50% + 0.8px),
      rgba(0,0,0,0) 100%),
    linear-gradient(to top right,
      rgba(0,0,0,0) 0%,
      rgba(0,0,0,0) calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      rgba(0,0,0,0) calc(50% + 0.8px),
      rgba(0,0,0,0) 100%),
    linear-gradient(to right,
      #efefef 0%,
      #efefef calc(50% - 0.8px),
      rgba(0,0,0,1) 50%,
      #efefef calc(50% + 0.8px),
      #efefef 100%);
}

/* Hide content that does not correspond with the hidden attribute's value. */
input.sheet-health[value="0"] ~ :not(.sheet-health):not(.sheet-no-damage) {
  display: none;
}
input.sheet-health[value="1"] ~ :not(.sheet-health):not(.sheet-bashing-damage) {
  display: none;
}
input.sheet-health[value="2"] ~ :not(.sheet-health):not(.sheet-lethal-damage) {
  display: none;
}
input.sheet-health[value="3"] ~ :not(.sheet-health):not(.sheet-aggravated-damage) {
  display: none;
}

Four Ways to Use an Attribute

Standard

Create one of: <input> (with a type attribute of "text", "number", "checkbox", "radio", or "hidden"), <select>, or <textarea>, and set the element's name attribute to a value beginning with "attr_"

<input type="text" name="attr_text_example">
<input type="number" name="attr_number_example">
<input type="checkbox" name="attr_checkbox_example">
<input type="radio" name="attr_radio_example">
<input type="hidden" name="attr_hidden_example" value="0">
<select name="attr_select_example">
    <option value="1">First option</option>
    <option value="2">Second option</option>
</select>
<textarea name="attr_textarea_example"></textarea>

The value of the form element will be stored as the value of an attribute with the same name as the form element, except the "attr_" prefix will be removed. So, an element named "attr_example" will be stored in the attribute "example".

Text inputs, number inputs, and textareas will not update the backing attribute until they lose focus, for example when you click elsewhere on the sheet or hit the [tab] key.

Hidden inputs are, as you might guess, hidden to the user. They cannot be interacted with, and so they are prime candidates for intermediate calculations of autocalc or storing things the user doesn't need to see or change for Sheet Worker Scripts.

If you have multiple radio inputs with the same name, only one of those radios will be checked at any given time. If you have multiple other kinds of elements with the same name, their values will be synchronized. This can be used, for example, if you have a tab layout with the same field present in two tabs. Give them both the same name, and they will always have the same value.

Autocalc Fields

Main Page: Auto-Calc

If a field has the disabled attribute, the user will be unable to modify its value and its value will be treated as a mathematical equation (which can reference other attributes of the character). The result of that formula will be what the user sees. Errors in the formula (for example, @{a} + @{b} + @{c} when attribute b has no value) will result in no output.

When using sheet workers, the value of the autocalc field you get from the getAttrs function will be its formula, and you cannot set its value to something else. See sheetworker-autocalc for a utility to resolve autocalc fields to their calculated value in a sheet worker script. Note: sheetworker-autocalc has not been tested with repeating fields.

Readonly Fields

If a field has the readonly attribute, the user will be unable to modify its value, and its default styling will be the same as if it were disabled. However, sheet worker scripts will be able to modify its value, and if its value is some kind of equation, it won't be automatically calculated. Note: If for some reason a readonly field is an equation, sheetworker-autocalc will be able to resolve it to a value just fine.

Attribute-Backed <span>s

A <span> element can be given an attr_ name, just like one of the form elements, above. This will cause the span to behave similarly to a readonly field in that the user cannot modify it directly, and sheet worker scripts have no trouble doing so. There are two main differences with an attribute backed span:

1. The default styling: the span will look just like the surrounding text
2. When using attribute backed spans in a repeating section, you should always make a hidden input version of the attribute as attribute backed spans in repeating sections cannot be called without the full repeating section syntax (e.g. @{repeating_SECTIONNAME_$X_attribute_name}).

Checkbox and Radio Input Styling

Checkboxes and radio buttons don't like getting changed much. Instead, it can be easier to use a hidden attribute and present a button to update the attribute.

New Pure HTML + CSS styling with Labels

This is Richard T's updated pure HTML + CSS that uses labels to force interior elements to be part of the input.

https://jsfiddle.net/medieve/rfkvu3hm/

<input type="checkbox"><span></span>
<input type="radio" name="attr_r"><span></span>
<input type="radio" name="attr_r"><span></span>
<input type="radio" name="attr_r"><span></span>
<input type="radio" name="attr_r"><span></span>
<input type="radio" name="attr_r"><span></span>

/* Hide actual radio/checkbox */
input[type="radio"],
input[type="checkbox"] {
    opacity: 0;
    width: 16px;
    height: 16px;
    position: relative;
    top: 5px;
    left: 6px;
    margin: -10px;
    cursor: pointer;
    z-index: 1;
}

/* Fake radio/checkbox */
input[type="radio"] + span::before,
input[type="checkbox"] + span::before {
    margin-right: 4px;
    border: solid 1px #a8a8a8;
    line-height: 14px;
    text-align: center;
    display: inline-block;
    vertical-align: middle;
    box-shadow: 0 0 2px #ccc;
    background: #f6f6f6;
    background: radial-gradient(#f6f6f6, #dfdfdf);
}

/* Fake radio */
input[type="radio"] + span::before {
    content: "";
    width: 12px;
    height: 12px;
    font-size: 24px;
    border-radius: 50%;
}

input[type="radio"]:checked + span::before {
    content: "•";
}

/* Fake checkbox */
input[type="checkbox"] + span::before {
    content: "";
    width: 14px;
    height: 14px;
    font-size: 12px;
    border-radius: 3px;
}

input[type="checkbox"]:checked + span::before {
    content: "✓";
}

(The following examples use CSS flex for alignment. For more on flex layouts, see Building Character Sheets#Layout)

Checkbox Example

<div class="toggle-container">
  <input type="hidden" class="toggle" name="attr_show_flag" />
  <button type="action" name="act_show" class="toggle">
    <span class="checked">✓</span>
  </button>
  <span>Show?</span>
</div>
<script type="text/worker">
  // Register the click handler to all specified buttons.
  const toggleList = ["show"];
  toggleList.forEach(function(button) {
    on(`clicked:${button}`, function() {
      const flag = `${button}_flag`;
      // Check the current value of the hidden flag.
      getAttrs([flag], function(v) {
        // Update the value of the hidden flag to "1" for checked or "0" for unchecked.
        setAttrs({
          [flag]: v[flag] !== "1" ? "1" : "0"
        });
      });
    });
  });
</script>

/* Configure a container for the toggle */
.sheet-toggle-container {
  display: inline-flex;
  align-items: center;
}

/* Configure the button styling. This example makes it look like a checkbox. */
button.sheet-toggle {
  padding: 0;
  border: solid 1px #a8a8a8;
  cursor: pointer;

  width: 16px;
  height: 16px;
  border-radius: 3px;
  display: flex;
  justify-content: center;
  align-items: center;

  font-size: 12px;
}

/* Hide the "checked" section of the toggle if the attribute value is not "1". */
input.sheet-toggle:not([value="1"]) ~ button.sheet-toggle > span.sheet-checked {
  display: none;
}

Radios Example

<div class="radios">
  <input type="hidden" class="radio" name="attr_level" value="1" />
  <button type="action" name="act_level_1" class="radio radio-1">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_level_2" class="radio radio-2">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_level_3" class="radio radio-3">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_level_4" class="radio radio-4">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_level_5" class="radio radio-5">
    <span class="checked"></span>
  </button>
</div>
<script type="text/worker">
  const levelRadioValues = ["1","2","3","4","5"];
  levelRadioValues.forEach(function(value) {
    on(`clicked:level_${value}`, function() {
      setAttrs({
        ["level"]: value
      });
    });
  });
</script>

/* Configure a container for the radio buttons. */
.sheet-radios {
  display: flex;
  align-items: center;
}

/* Configure the button styling. This example makes it look like a radio. */
button.sheet-radio {
  padding: 0;
  border: solid 1px #a8a8a8;
  cursor: pointer;

  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}
button.sheet-radio > span.sheet-checked {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: buttontext;
}

/* Hide the "checked" section of the radio if the attribute value does not match the radio */
input.sheet-radio:not([value="1"]) ~ button.sheet-radio-1 > span.sheet-checked,
input.sheet-radio:not([value="2"]) ~ button.sheet-radio-2 > span.sheet-checked,
input.sheet-radio:not([value="3"]) ~ button.sheet-radio-3 > span.sheet-checked,
input.sheet-radio:not([value="4"]) ~ button.sheet-radio-4 > span.sheet-checked,
input.sheet-radio:not([value="5"]) ~ button.sheet-radio-5 > span.sheet-checked {
  display: none;
}

Alternative Checkboxes

You're not restricted to a box with a check on it if you want a binary state (on or off). When styling your checkbox (or radio button!) you can use just about anything.

/* Fake checkbox */
input[type="checkbox"] + span::before {
    margin-right: 4px;
    line-height: 14px;
    text-align: center;
    display: inline-block;
    vertical-align: middle;
    content: "▼";
    width: 14px;
    height: 14px;
    font-size: 12px;
}

input[type="checkbox"]:checked + span::before {
    content: "►";
}

<input type="hidden" class="direction" name="attr_direction" value="down" />
<button type="action" name="act_direction_toggle" class="direction">
  <span class="down">▼</span>
  <span class="right">►</span>
</button>
<script type="text/worker">
  on("clicked:direction_toggle", function() {
    // Check the current value of the hidden attribute.
    getAttrs(["direction"], function(v) {
      // Toggle the hidden attribute value between "down" and "right"
      setAttrs({
        "direction": v["direction"] !== "down" ? "down" : "right"
      });
    });
  });
</script>

/* Clear default button styling */
button.sheet-direction {
  margin: 0;
  overflow: visible;
  text-transform: none;
  border-style: none;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

/* Hide the section(s) that do not match the attribute value */
input.sheet-direction:not([value="down"]) + button.sheet-direction > span.sheet-down {
  display: none;
}
input.sheet-direction:not([value="right"]) + button.sheet-direction > span.sheet-right {
  display: none;
}

Now, instead of an empty box, or a box with a checkmark, you've got a right-pointing arrow or a down-pointing arrow. You can hide/display any other html content based on the hidden attribute value.

Fill Radio Buttons to the Left

A number of games use a set of bubbles, filled in from left to right, to represent various traits. For example, selecting the third bubble in "Strength" to indicate a Strength value of 3 should also fill in bubbles 1 and 2.

<input type="radio" name="attr_r" value="1" checked="checked"><span></span>
<input type="radio" name="attr_r" value="2"><span></span>
<input type="radio" name="attr_r" value="3"><span></span>
<input type="radio" name="attr_r" value="4"><span></span>
<input type="radio" name="attr_r" value="5"><span></span>

/* Hide actual radio */
input[type="radio"] {
    opacity: 0;
    width: 16px;
    height: 16px;
    position: relative;
    top: 5px;
    left: 6px;
    margin: -10px;
    cursor: pointer;
    z-index: 1;
}

/* Fake radio */
input[type="radio"] + span::before {
    margin-right: 4px;
    border: solid 1px #a8a8a8;
    line-height: 14px;
    text-align: center;
    display: inline-block;
    vertical-align: middle;
    box-shadow: 0 0 2px #ccc;
    background: #f6f6f6;
    background: radial-gradient(#f6f6f6, #dfdfdf);
    content: "•";
    width: 12px;
    height: 12px;
    font-size: 24px;
    border-radius: 50%;
}

/* Remove dot from all radios _after_ selected one */
input[type="radio"]:checked ~ input[type="radio"] + span::before {    
    content: "";
}

input[type="radio"]:checked ~ input[type="radio"] + span::before,
input[type="radio"]:checked + span::before

<div class="dots">
  <input type="hidden" name="attr_strength" class="dot" value="1" />
  <button type="action" name="act_strength_1" class="dot">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_strength_2" class="dot gt-1">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_strength_3" class="dot gt-1 gt-2">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_strength_4" class="dot gt-1 gt-2 gt-3">
    <span class="checked"></span>
  </button>
  <button type="action" name="act_strength_5" class="dot gt-1 gt-2 gt-3 gt-4">
    <span class="checked"></span>
  </button>
</div>
<script type="text/worker">
  const strengthValues = ["1","2","3","4","5"];
  strengthValues.forEach(function(value) {
    on(`clicked:strength_${value}`, function() {
      setAttrs({
        "strength": value
      });
    });
  });
</script>

.sheet-dots{
  display:flex;
}
/* Configure the button styling. This example makes it look like a radio. */
button.sheet-dot {
  padding: 0;
  border: solid 1px #a8a8a8;
  cursor: pointer;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}

button.sheet-dot > span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: buttontext;
}

/* Hide the "checked" section of the radio if the hidden attribute value is greater than the button value */
input.sheet-dot[value="1"] ~ button.sheet-gt-1 > span.sheet-checked {
  display: none;
}
input.sheet-dot[value="2"] ~ button.sheet-gt-2 > span.sheet-checked {
  display: none;
}
input.sheet-dot[value="3"] ~ button.sheet-gt-3 > span.sheet-checked {
  display: none;
}
input.sheet-dot[value="4"] ~ button.sheet-gt-4 > span.sheet-checked {
  display: none;
}

Here, the "gt-*" classes are used to indicate "greater than" a particular value. This doesn't use any kind of math, so all distinct "gt-*" classes have to be included. For example, dot 3 has classes "gt-1" and "gt-2" because 3 is greater than both 1 and 2. Dot 1 does not have any "gt-*" classes because it is not greater than any of the other options. (If a zero option is possible, then all of these buttons will need a "gt-0" class.)

Each possible value of the attribute needs a corresponding CSS rule to hide all values greater than that value. (The value of "5" doesn't need a rule here because there are no options greater than 5.)

This example uses a subtractive approach, meaning a that by default the button will indicate it is checked unless a CSS rule hides the "checked" span.

Important Note: When using this trick inside a repeating section, it will not work if there are underscores in an action button name. The above buttons should be named "attr_strength1" or "attr_strength-1" - they cant be "attr_strength_1".

Circular Layouts

Live Demo

Some character sheets have rather interesting layouts. Mage: the Ascension, for example, has a pair of traits called Quintessence and Paradox that are both mapped onto a wheel of checkboxes.

<div>
    <div>
        <input type="checkbox" class="sheet-wheel sheet-wheel9 sheet-middle sheet-left-1" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel27 sheet-mid-three-eighth sheet-left-2" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel45 sheet-mid-quarter sheet-left-3" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel63 sheet-mid-eighth sheet-left-4" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel81 sheet-top sheet-left-5" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel99 sheet-top sheet-left-6" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel117 sheet-mid-eighth sheet-left-7" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel135 sheet-mid-quarter sheet-left-8" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel153 sheet-mid-three-eighth sheet-left-9" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel171 sheet-middle sheet-left-10" value="1"><span></span>
    </div>
    <div>
        <input type="checkbox" class="sheet-wheel sheet-wheel171 sheet-middle-2 sheet-left-1" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel153 sheet-mid-five-eighth sheet-left-2" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel135 sheet-mid-three-quarter sheet-left-3" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel117 sheet-mid-seven-eighth sheet-left-4" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel99 sheet-bottom sheet-left-5" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel81 sheet-bottom sheet-left-6" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel63 sheet-mid-seven-eighth sheet-left-7" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel45 sheet-mid-three-quarter sheet-left-8" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel27 sheet-mid-five-eighth sheet-left-9" value="1"><span></span>
        <input type="checkbox" class="sheet-wheel sheet-wheel9 sheet-middle-2 sheet-left-10" value="1"><span></span>
    </div>
    <div class="sheet-marker">•</div>
</div>

/* Hide actual checkbox */
input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 15px;
    height: 15px;
    cursor: pointer;
    z-index: 1;
    margin-top: 6px;
}

/* Fake checkbox */
input[type="checkbox"] + span::before {
    border: solid 1px #a8a8a8;
    line-height: 14px;
    text-align: middle;
    display: inline-block;
    vertical-align: middle;
    box-shadow: 0 0 2px #ccc;
    background: #f6f6f6;
    background: radial-gradient(#f6f6f6, #dfdfdf);
    position: relative;
    content: "";
    width: 14px;
    height: 14px;
    font-size: 12px;
    border-radius: 3px;
}

/* Styles unique to fake checkbox (checked) */
input[type="checkbox"]:checked + span::before {
    content: "✓";
    color: #a00;
    box-shadow: 0 0 2px transparent;
}

/* Position checkboxes vertically in circle */
input.sheet-top  { margin-top: 5px; }
input.sheet-top + span::before { top: 0px; }
input.sheet-mid-eighth { margin-top: 12px; }
input.sheet-mid-eighth + span::before  { top: 7px; }
input.sheet-mid-quarter { margin-top: 27px; }
input.sheet-mid-quarter + span::before  { top: 22px; }
input.sheet-mid-three-eighth { margin-top: 45px; }
input.sheet-mid-three-eighth + span::before  { top: 40px; }
input.sheet-middle { margin-top: 67px; }
input.sheet-middle + span::before  { top: 62px; }
input.sheet-middle-2 { margin-top: 73px; }
input.sheet-middle-2 + span::before  { top: 68px; }
input.sheet-mid-five-eighth { margin-top: 95px; }
input.sheet-mid-five-eighth + span::before  { top: 90px; }
input.sheet-mid-three-quarter { margin-top: 113px; }
input.sheet-mid-three-quarter + span::before  { top: 108px; }
input.sheet-mid-seven-eighth { margin-top: 127px; }
input.sheet-mid-seven-eighth + span::before  { top: 122px; }
input.sheet-bottom { margin-top: 135px; }
input.sheet-bottom + span,
input.sheet-bottom + span::before  { top: 130px; }

/* Position checkboxes horizontally in circle */
input.sheet-left-1 { margin-left: 14px; }
input.sheet-left-1 + span::before  { left: 14px; }
input.sheet-left-2 { margin-left: 1px; }
input.sheet-left-2 + span::before  { left: 1px; }
input.sheet-left-3 { margin-left: -4px; }
input.sheet-left-3 + span::before  { left: -4px; }
input.sheet-left-4 { margin-left: -5px; }
input.sheet-left-4 + span::before  { left: -5px; }
input.sheet-left-5 { margin-left: -2px; }
input.sheet-left-5 + span::before  { left: -2px; }
input.sheet-left-6 { margin-left: 1px; }
input.sheet-left-6 + span::before  { left: 1px; }
input.sheet-left-7 { margin-left: 3px; }
input.sheet-left-7 + span::before  { left: 3px; }
input.sheet-left-8 { margin-left: 2px; }
input.sheet-left-8 + span::before  { left: 2px; }
input.sheet-left-9 { margin-left: -4px; }
input.sheet-left-9 + span::before  { left: -4px; }
input.sheet-left-10 { margin-left: -16px; }
input.sheet-left-10 + span::before  { left: -16px; }

/* Rotate checkboxes */
input.sheet-wheel9,
input.sheet-wheel9 + span::before { transform: rotate(9deg); }
input.sheet-wheel27,
input.sheet-wheel27 + span::before { transform: rotate(27deg); }
input.sheet-wheel45,
input.sheet-wheel45 + span::before { transform: rotate(45deg); }
input.sheet-wheel63,
input.sheet-wheel63 + span::before { transform: rotate(63deg); }
input.sheet-wheel81,
input.sheet-wheel81 + span::before { transform: rotate(81deg); }
input.sheet-wheel99,
input.sheet-wheel99 + span::before { transform: rotate(99deg); }
input.sheet-wheel117,
input.sheet-wheel117 + span::before { transform: rotate(117deg); }
input.sheet-wheel135,
input.sheet-wheel135 + span::before { transform: rotate(135deg); }
input.sheet-wheel153,
input.sheet-wheel153 + span::before { transform: rotate(153deg); }
input.sheet-wheel171,
input.sheet-wheel171 + span::before { transform: rotate(171deg); }

div.sheet-marker {
    margin: 36px 0px 0px 5px;
    font-size: 20px;
}

Select Dropdown Styling

Live Demo

<select> elements are notoriously difficult to apply most styles to. However, using :hover pseudo-selectors and radio buttons, you can create something approximating a dropdown with whatever style you like.

<div class="sheet-container">
    <div class="sheet-child">
        <input type="radio" name="attr_radio" class="sheet-select-radio sheet-d4" value="1" checked="true" />
        <label>d4</label>
        <input type="radio" name="attr_radio" class="sheet-select-radio sheet-d8" value="2" />
        <label>d8</label>
        <div class="sheet-d4"></div>
        <div class="sheet-d8"></div>
    </div>
</div>

.sheet-container {
    width: 280px;
}

.sheet-container,
.sheet-child {
    display: inline-block;
}

.sheet-child {
    vertical-align: middle;
    width: 35px;
    height: 35px;
}

.sheet-child input,
.sheet-child input + label {
    display: none;
    z-index: 1;
}

.sheet-child:hover {
    background: gray;
    position:absolute;
    width: 100px;
    height: auto;
    z-index: 1;
    padding: 5px;
}

.sheet-child:hover > div.sheet-d4 {
    display: none;
}

.sheet-child:hover input,
.sheet-child:hover input + label {
    display: inline;
}

.sheet-child:hover input + label {
   margin-right: 50%
}

.sheet-child:hover label {
    display: inline-block;
}

div.sheet-d4 {
    background-position: -411px -1px;
    width: 35px;
    height: 35px;
    background-image: url("https://i.imgur.com/zkgyBOi.png");
    background-repeat: no-repeat;
    color: transparent;
    display: none;
}

div.sheet-d8 {
    background-position: -703px -1px;
    width: 35px;
    height: 35px;
    background-image: url("https://i.imgur.com/zkgyBOi.png");
    background-repeat: no-repeat;
    color: transparent;
    display: none;
}

.sheet-child:not(:hover) input.sheet-select-radio.sheet-d4:checked ~ div.sheet-d4,
.sheet-child:not(:hover) input.sheet-select-radio.sheet-d8:checked ~ div.sheet-d8 {
    display: block;
}

Select Dropdown Text Styling

Here's another method to edit text within a select. Use an input with type="hidden" given the same attribute name as the select to trigger css styles on the select's option text.

<input name="attr_favcolor" type="hidden" class="sheet-color-switch">
<select name="attr_favcolor" class="sheet-color-select1">
  <option style="color:red;" value="0" selected>Red</option>
  <option style="color:yellow;" value="1">Yellow</option>
  <option style="color:blue;" value="2">Blue</option>
</select>

.sheet-color-switch[value="0"] + .sheet-color-select1 {color: red;}
.sheet-color-switch[value="1"] + .sheet-color-select1 {color: yellow;}
.sheet-color-switch[value="2"] + .sheet-color-select1 {color: blue;}

Button Styling

Here are a few examples on how to style your roll buttons, both Roll Buttons and action buttons.

Remove the default d20 icon

Want a roll button that doesn't have a d20 image in it? Simple!

CSS:

button[type=roll].sheet-blank-roll-button::before { content: ''; }

HTML:

<button type="roll" value="/roll 1d20 + @{Bluff}" name="roll_BluffCheck" class="blank-roll-button"></button>

The d20 is a single character with the dicefontd20 font-family in the button's ::before pseudo-element. Setting the content to an empty string removes it.

Roll button with a d6 icon

By using the icon fonts available in Roll20, we can replace the d20 icon it with a different dice, instead of removing it.

CSS:

button[type=roll].sheet-d6-dice::before {
	font-family: 'dicefontd6';
	content: 'F ';
}

HTML:

<button type="roll" value="/roll @{dex}d6" name="roll_dex" class="d6-dice"></button>

Button to blend in

The Stargate sheet is an example of a sheet that has turned the Attribute & Skill buttons to look like just text, setting the border and button background to transparent, and reducing it's padding.

Button with an image

The Ambition & Avarice sheet has two examples where the roll buttons have been changed from the default d20 icon, to make the d20 and d5 buttons look hand-drawn. For the image to stay in place when you hover over it with a mouse, you need to do some manual adjustments for :hover CSS class for the image position, that may vary depending on the size/shape of the image. Image use in character sheets contains more examples.

Button Dynamic Text

By placing an Attribute-Backed inside the button.

You then have an input elsewhere with the identical name that can then change the value of the attribute displayed on the button.

<button type="roll" value="/roll 3d6" name="roll_attack"><span name="attr_attackname"></span></button>
<input type="text" name="attr_attackname" value="Sword">

Styling Repeating Sections

Repeating Sections on the Building Character Sheets-page

It's possible to style your repeating sections in a variety of ways. However, you can't just write your CSS as though the <fieldset> that's in your HTML source is what the user is viewing. After writing the code for your repeating section, here is how it will look when rendered to the user:

<fieldset class="repeating_my-repeating-section" style="display: none;">
    <!-- my-repeating-section HTML -->
</fieldset>
<div class="repcontainer" data-groupname="repeating_my-repeating-section">
    <div class="repitem">
        <div class="itemcontrol">
            <button class="btn btn-danger pictos repcontrol_del">#</button>
            <a class="btn repcontrol_move">≡</a>
        </div>
        <!-- my-repeating-section HTML -->
    </div>
    <!-- there will be a div.repitem for each item the user has actually added to the sheet -->
</div>
<div class="repcontrol" data-groupname="repeating_my-repeating-section">
    <button class="btn repcontrol_edit">Modify</button>
    <button class="btn repcontrol_add">+Add</button>
</div>

When you click the Modify button, the Add button is is set to display: none and the text of the Modify button is changed to "Done". When you click Done, the Add button is set to display: inline-block and the text of the Done button is changed to "Modify". While modifying repitems, the repcontainer gains the class "editmode".

Armed with this knowledge, you can do numerous things to alter how your repeating sections are displayed on the final character sheet. For example, you can have multiple repeating items per row:

.repcontainer[data-groupname="repeating_example"] > .repitem {
    display: inline-block;
}

Note: You do not prefix the rep* classes with sheet-!

Remember to use the [data-groupname="repeating_..."] attribute selector if you want to only apply the style to a single repeating section. Of course, if you want the style to affect all of your repeating sections, that's not needed.

What Can't You Do?

You cannot:

• Change the "display" property of the original <fieldset>.
• Change the text of the Add, Modify/Done, Delete, or Move buttons.
  • However, you could set their opacity to 0 and display something in their place, much like styling checkboxes and radios, as well as add ::before or ::after pseudo-elements to them.
• Change the "display" property of the Add button after the user has pressed Modify once.

Counting Items

Live Demo

CSS can let you count things. This can be applied in multiple contexts for character sheets, but one option is to count how many repeating items are in your repeating section:

<div class="sheet-repeating-fields">
    <fieldset class="repeating_my-repeating-section">
        <span class="sheet-counter"></span>
        <input type="text" name="attr_example">
    </fieldset>
</div>

.sheet-repeating-fields {
  counter-reset: sheet-rep-items;
}

.sheet-counter::before {
  counter-increment: sheet-rep-items;
  content: counter(sheet-rep-items) '. ';
}

Filter Repeating section displays according to criteria within the repeating items itself

Assume you want a tabbed section to organize/display spells. All the 1st circle spells are displayed under tab 1, all the 2nd circle spells under tab 2, Etc. One way to do this is to duplicate the html code for each spell level. You have 10 lists, and the tabs choose which of the 10 lists to display. The following code shows how to have one list, but to filter the list so it only displays certain spells.

GiGs has a few forum posts that demonstrates an alternative a likely better method to do the same as this in the following forum threads:

• Thread 1
• more complex filters: Thread 2
• for multiple filters: Thread 3

The HTML looks something like this.

    <span class="sheet-fixed-width" style="width: 11em;"><b> Spell List </b></span><br>
    <input type="radio" name="attr_tab-spells" class="sheet-tab sheet-spells-tab0" value="0" title="All circles" checked style="margin-left:1px;"/>
    <span class="sheet-tab sheet-spells-tab0">All</span>
    <input type="radio" name="attr_tab-spells" class="sheet-tab sheet-spells-tab1" value="1" title="Circle 1"/>
    <span class="sheet-tab sheet-spells-tab1">Circle 1</span>
    <input type="radio" name="attr_tab-spells" class="sheet-tab sheet-spells-tab2" value="2" title="Circle 2"/>
    <span class="sheet-tab sheet-spells-tab2">Circle 2</span>
    <input type="radio" name="attr_tab-spells" class="sheet-tab sheet-spells-tab3" value="3" title="Circle 3"/>
    <span class="sheet-tab sheet-spells-tab3">Circle 3</span>

    <div class="sheet-section sheet-section-sp-list">
        <fieldset class="repeating_spell">
            <input type="radio" name="attr_SP_Circle" class="sheet-hidden sheet-spells-tab0" value="0" checked />
            <input type="radio" name="attr_SP_Circle" class="sheet-hidden sheet-spells-tab1" value="1"/>
            <input type="radio" name="attr_SP_Circle" class="sheet-hidden sheet-spells-tab2" value="2"/>
            <input type="radio" name="attr_SP_Circle" class="sheet-hidden sheet-spells-tab3" value="3"/>
            <div class="sheet-filtered-box">
                <span><select name="attr_SP_Circle" class="sheet-nowrap sheet-label-down" style="width:5em;">
                    <option value="0" selected title"Please choose the circle for this spell.">-</option>
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                </select>Circle</span>
                <span class="sheet-nowrap">
                        <input name="attr_SP_Name" type="text" style="width:12em;" placeholder="Spell Name" ></span>

More fields.
            </div>
        </fieldset>
    </div>

The relevant part of the css looks like this.

div.sheet-section-sp-list {
	max-height: 999999px;
	visibility: visible;
	opacity: 1;
	transition: opacity 0.5s linear 0s;
	overflow: hidden;
}

.charsheet .repcontainer .repitem,          /* A filterbox should look exactly like a repitem.  */
.sheet-filtered-box {
    padding: 5px 5px 2px 5px;
    margin: 5px;
	border: 2px solid #CCCCCC;
	border-radius: 3px;
}

.repcontainer .repitem {
    overflow: hidden;
}

.sheet-section-sp-list>fieldset.repeating_spell+.repcontainer>.repitem {     /* A repitem within a spellslist should functionally not exist, it's place is taken by a filterbox. */
    padding: 0px;
    margin: 0px;
    border: none;
	border-radius:;
}

.sheet-filtered-box {       /* By default, display no items of a filter box */
    display: none;
}
            /* Decide which specific repitems to display.  */
input.sheet-spells-tab0:checked~.sheet-filtered-box,      /* Always display all spells of circle zero.  */
.sheet-spells-tab0:checked~.sheet-section-sp-list>fieldset.repeating_spell+.repcontainer>.repitem .sheet-filtered-box,  /* When tab0 is checked, display everything no matter what which of the inner boxes are checked. */
.sheet-spells-tab1:checked~.sheet-section-sp-list>fieldset.repeating_spell+.repcontainer>.repitem input.sheet-spells-tab1:checked~.sheet-filtered-box,
.sheet-spells-tab2:checked~.sheet-section-sp-list>fieldset.repeating_spell+.repcontainer>.repitem input.sheet-spells-tab2:checked~.sheet-filtered-box,
.sheet-spells-tab3:checked~.sheet-section-sp-list>fieldset.repeating_spell+.repcontainer>.repitem input.sheet-spells-tab3:checked~.sheet-filtered-box {
	display: block;
} 

So basically what this does is it makes a filterbox look exactly like a repitem. By default, no filterboxes are displayed. The last css entries basically say where tab X above the repeating field is checked, and the same radio button inside a specific repitem is checked, then display that item.

Duplicate a repeating section name to display the same data on more than one tab.or present a summary of the data elsewhere

I am not certain that this trick is recommended by the developers, but as of this writing, it works.

You can put the same repeating section name in your html more than once in order to display the same information in multiple styles. You can have individual items displayed one way in one instance of the section (for example as a list of select/options) and a different way (for example as a read only text field) elsewhere. It is extremely useful to combine this trick with the previous section (filtering), so that only a select subset are displayed in different places, but you can do this with the convenience of having the data stored once in one list.

For example, on one tab you can have lots of fiddly options and choices, but on another tab you can display the same list of data pared down to it's minimalist essentials. If the user needs the full list, he can go to the details tab. But the items he uses most frequently fit compactly in a section of another tab. In ether case he is looking at, and manipulating the same list of data, not a list and a separate copy.

Here are the rules:

• You can repeat repeating section names. Each repeated section will share the same rows and items, but each can present the data in a different way. For example : <fieldset class="repeating_weapons sheet-filtershortlist sheet-filtersummarylist"> the additional class tags can be used to differentiate how this section is to be styled as opposed to other repeating_weapons lists display the data.
• Not all items must be present or displayed in all lists. However each item must be present in every list in which it is used. For example, if you have an auto-calc field, or a button that uses a field, All the fields used in the autocalc, or passed by the button, must be present in the same instance of the repeating section, it will not go looking for it in other instances of the repeating section. The referenced field may be hidden, but must be present.
• You can change how fields are presented. For example they can be editable in one instance, but readonly in another.
• If you change repitem to inline-block, it will float "rows" up so that it can display more than one per line.

fieldset.sheet-filtersummarylist+.repcontainer .repitem {
  display: inline-block;
  margin-right: 2em;
}

• If you want the user to only add or modify items in one place, you can get rid of the Add/Modify buttons in the other places by simply adding display: none: to a set of tags similar to this: fieldset.sheet-filtershortlist~.repcontrol where of course the .sheet tag is whatever tag you specify in your html.

Disable Click

Example of some inputs disabled with pointer-events: none;(visual glitch unrelated)

You can use pointer-events or user-select to disable the user from selecting/interacting an element on the sheet with their mouse. It works for at least <select>, text/number/checkbox/radio inputs & <button>.

Note: Neither pointer-events nor user-select stops users from selecting the element using the TAB-key.

.sheet-noclick{
  pointer-events: none;  
}

Then you can use some other condition to turn this feature on/off, such as a checkbox. This trick have been used on many sheet.

Example:

<div>
    <label>disabled</label>
    <span>
        <input type="text" name="attr_name" class="noclick">
    </span>
    <span>
        <input type="number" name="attr_lvl" class="noclick">
    </span>
    <span>
        <input type="checkbox" name="attr_check" value="1" class="noclick">
    </span>
    <span>
        <input type="radio" name="attr_radio" value="0" class="noclick">
        <input type="radio" name="attr_radio" value="1" class="noclick">
    </span>
    <select name="attr_WoundLevel" class="noclick">
      <option value="0" selected="selected">Healthy</option>
      <option value="1">Stunned</option>
      <option value="1">Wounded</option>
      <option value="2">Wounded Twice</option>
      <option value="5">Incapacitated</option>
      <option value="10">Mortally Wounded</option>
    </select>
    <button type="roll" value="/roll 1d20" name="roll_init" class="noclick">init</button>
</div>
<div>
    <label>normal</label>
    <span>
        <input type="text" name="attr_name">
    </span>
    <span>
        <input type="number" name="attr_lvl">
    </span>
    <span>
        <input type="checkbox" name="attr_check" value="1">
    </span>
    <span>
        <input type="radio" name="attr_radio" value="0">
        <input type="radio" name="attr_radio" value="1">
    </span>
    <select name="attr_class">
         <option value="0" selected="selected">Warrior</option>
         <option value="1">Mage</option>
         <option value="2">Expert</option>
    </select>
    <button type="roll" value="/roll 1d20" name="roll_init">init</button>
</div>

select.sheet-noclick,
input[type="text"].sheet-noclick,
input[type="number"].sheet-noclick,
input[type="checkbox"].sheet-noclick,
input[type="radio"].sheet-noclick,
input[type="text"].sheet-noclick,
button[type="roll"].sheet-noclick{
  pointer-events: none;  
}

Dark/Light Mode

You can create an option for your sheet that can change the full color scheme of the sheet. The "Savage Worlds Tabbed" and "GURPS" sheet are two examples that have these options.

GiGs have made a short example of this.

Custom Progress Bar

To create a custom progress bar, one can use CSS and sheetworkers to update an hidden field. See also: Creating Custom Progress Bar - Forum Post

Leothedino have created a more sophisticated progress bar^(Forum), where you can change the current and max value for what is displayed, and a sheetworker then scales the numbers to fit the bar.

Live Demo

<div class="sheet-container">
<input type="hidden" value="2" name="attr_Character_overweight" class="sheet-hidden sheet-overweight">
<div class="sheet-overweight"></div>
</div>

div.sheet-overweight {
    width: 90%;
    height: 20px;
    border: 1px solid black;
    color: black;
    text-align: center;
}
input.sheet-overweight[value="0"] ~ div.sheet-overweight {
    background: white;
}
input.sheet-overweight[value="1"] ~ div.sheet-overweight {
    background: linear-gradient(to left, white 60%, green 75%);    
}
input.sheet-overweight[value="2"] ~ div.sheet-overweight {
    background: linear-gradient(to left, white 40%, yellow 75%);
}
    input.sheet-overweight[value="2"] ~ div.sheet-overweight:before {
        content:"Bags half full";
    }
input.sheet-overweight[value="3"] ~ div.sheet-overweight {
    background: linear-gradient(to left, white 20%, orange 75%);
}
    input.sheet-overweight[value="3"] ~ div.sheet-overweight:before {
        content: "Bags nearly full";
    }
input.sheet-overweight[value="4"] ~ div.sheet-overweight {
    background: linear-gradient(to left, white, red 100%);
}
    input.sheet-overweight[value="4"] ~ div.sheet-overweight:before {
        content: "Bags full !";
    }
input.sheet-overweight[value="5"] ~ div.sheet-overweight {
    background: black;
    color: white;
}
    input.sheet-overweight[value="5"] ~ div.sheet-overweight:before {
        content: "Bags too heavy !";
}

Hexagons

Live demo

<div class="sheet-hex sheet-hex-3" style="background-color: #444; width: 100px; height: 57px">		
    <div class="sheet-inner">
        <h4>Stat</h4>
        <input type="number" style="width: 50%">
    </div>		
    <div class="sheet-corner-1"></div>
    <div class="sheet-corner-2"></div>		
</div>

.sheet-hex {
    width: 100px;
    height: 57px;
    background-color: #ccc;
    background-repeat: no-repeat;
    background-position: 50% 50%;			
    background-size: auto 173px;							
    position: relative;
    float: left;
    margin: 25px 5px;
    text-align: center;
    zoom: 1;
}

.sheet-hex.sheet-hex-gap {
    margin-left: 86px;
}

.sheet-hex a {
    display: block;
    width: 100%;
    height: 100%;
    text-indent: -9999em;
    position: absolute;
    top: 0;
    left: 0;
}

.sheet-hex .sheet-corner-1,
.sheet-hex .sheet-corner-2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;								
    z-index: -2;						
    overflow: hidden;		
    backface-visibility: hidden;			
}

.sheet-hex .sheet-corner-1 {
    z-index:-1;
    transform: rotate(60deg);
}

.sheet-hex .sheet-corner-2 {
    transform: rotate(-60deg);
}

.sheet-hex .sheet-corner-1::before,
.sheet-hex .sheet-corner-2::before {
    width: 173px;
    height: 173px;
    content: '';
    position: absolute;
    background: inherit;
    top: 0;
    left: 0;
    z-index: 1;
    background: inherit;
    background-repeat: no-repeat;
    backface-visibility: hidden;				  
}

.sheet-hex .sheet-corner-1::before {
    transform: rotate(-60deg) translate(-87px, 0px);	
    transform-origin: 0 0;
}

.sheet-hex .sheet-corner-2::before {
    transform: rotate(60deg) translate(-48px, -11px);	
    bottom: 0;
}

/* Custom styles*/
.sheet-hex .sheet-inner { color: #eee; }

.sheet-hex h4 {
    font-family: 'Josefin Sans', sans-serif;		
    margin: 0;			
}

.sheet-hex hr {
    border: 0;
    border-top: 1px solid #eee;
    width: 60%;
    margin: 15px auto;
}

.sheet-hex p {
    font-size: 16px;
    font-family: 'Kotta One', serif;
    width: 80%;
    margin: 0 auto;
}

.sheet-hex.sheet-hex-1 { background: #74cddb; }
.sheet-hex.sheet-hex-2 { background: #f5c53c; }
.sheet-hex.sheet-hex-3 { background: #80b971; }

Note: Make sure the hexagon's width is 57% of the hexagon's height.

Clocks

Live Demo

CSS gradients can do all kinds of interesting things. Here's an example of creating a clock-shaped representation of a value:

<div class="sheet-harm-section">
  <input type="radio" value="0" name="attr_harm" class="sheet-harm-checkbox sheet-harm-0" checked>0
  <input type="radio" value="1" name="attr_harm" class="sheet-harm-checkbox sheet-harm-3">3
  <input type="radio" value="2" name="attr_harm" class="sheet-harm-checkbox sheet-harm-6">6
  <input type="radio" value="3" name="attr_harm" class="sheet-harm-checkbox sheet-harm-9">9
  <input type="radio" value="4" name="attr_harm" class="sheet-harm-checkbox sheet-harm-10">10
  <input type="radio" value="5" name="attr_harm" class="sheet-harm-checkbox sheet-harm-11">11
  <input type="radio" value="6" name="attr_harm" class="sheet-harm-checkbox sheet-harm12">12
  <hr>
  <div class="sheet-clock"></div>
</div>

.sheet-harm-section {
    display: inline-block;
    text-align: center;
}

.sheet-clock {
    width: 5em;
    height: 5em;
    display: inline-block;
    border-radius: 50%;
    background: black;
    border: 2px solid black;
}

.sheet-harm-checkbox.sheet-harm-0:checked ~ .sheet-clock {
    background: white;
}

.sheet-harm-checkbox.sheet-harm-3:checked ~ .sheet-clock {
    background-image: linear-gradient(180deg, transparent 50%, white 50%),
                      linear-gradient(90deg, white 50%, transparent 50%);
}

.sheet-harm-checkbox.sheet-harm-6:checked ~ .sheet-clock {
    background-image: linear-gradient(90deg, white 50%, transparent 50%);
}

.sheet-harm-checkbox.sheet-harm-9:checked ~ .sheet-clock {
    background-image: linear-gradient(180deg, transparent 50%, black 50%),
                      linear-gradient(90deg, white 50%, transparent 50%);
}

.sheet-harm-checkbox.sheet-harm-10:checked ~ .sheet-clock {
    background-image: linear-gradient(210deg, transparent 50%, black 50%),
                      linear-gradient(90deg, white 50%, transparent 50%);
}

.sheet-harm-checkbox.sheet-harm-11:checked ~ .sheet-clock {
    background-image: linear-gradient(240deg, transparent 50%, black 50%),
                      linear-gradient(90deg, white 50%, transparent 50%);
}

.sheet-harm-checkbox.sheet-harm-12:checked ~ .sheet-clock {
    background-color: black;
}

Custom Fonts

Roll20 supports five fonts (Arial, Patrick Hand, Contrail One, Shadows Into Light and Candal). It's still possible to use custom fonts, but it's not guaranteed to work and requires the user who want to see them to disable browser brower security to allow "unsecure scripts" to either allow Roll20 to search for locally installed fonts or import a font from an URL.

Starfinder HUD is an example of a sheet using custom font, and having a fallback font if the user doesn't allow unsafe scripts.

@font-face{/*The aldrich font*/
    font-family:Aldrich;
    src:local('Aldrich'),local('Aldrich-Regular'),url(https://kurohyou.github.io/Starfinder-Character-Sheet/Sheet%20Fonts/Aldrich-Regular.ttf);
}

* {
    font-family:Aldrich,Copperplate,Monospace;
}

In the segment above, @font-face defines the name and source of the font. It first asks the broswer if the font exists locally, and if it isn't locally installed, the url gives a location to download the url from.

Here is a list of Web-safe fonts that comes preinstalled on most operating systems, which helps avoiding the need to find a source where the font is hosted online. This search through Roll20's sheet repository shows other sheet that also use custom fonts.

Icon Fonts

An icon font is a font which has pictures instead of letters. You can specify one of the icon fonts below with the font-family property. For example, something like:

<p>A Gem: <span style="font-family: 'Pictos Three'">a</span></p>

Would produce:

A Gem: a

Pictos

Pictos Custom

Pictos Three

dicefontd4

dicefontd6

dicefontd8

dicefontd10

dicefontd12

dicefontd20

dicefontd30

fontello

See Also

• Andreas Guide to Sheet Development
• Building Character Sheets
  • Designing Character Sheet Layout - tips on how to best design the broad strokes of a character sheet
  • Image use in character sheets - How to include images on your character sheets
  • Sheet Design Best Practices
  • Sheetworkers - relevant for many of the more complicated tricks on the page
  • Sheet Author Tips - misc. best practices and good ideas for those who often work with sheets
  • Sheet Sandbox – the better editor to use when you code your character sheets
• List of all pages related to "Character Sheet Creation"
• Roll20 GitHub repository

Guides

• Introduction to HTML - MDN web docs
• Introduction to CSS - MDN web docs
• Introduction to JavaScript - MDN web docs