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Browser Developer Tools

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Using the Firefox dev tools to inspect live sheet code

Using the built in Web Dev tools in your browser helps a lot with figuring things out. Both Firefox & Chrome (others) have their own versions.

Open it: pressing F12 or Right Click anywhere & select "Inspect".

Uses in Roll20

  • Get extra info to send with a Roll20 bug report
  • Tweaking Roll20 looks with Stylus
    • as long as something isn't part of the <canvas>, one can write & edit CSS Wikipedia-Black-W.png snippets that changes the look for yourself if you save it as a userstyle with Stylus.

Macros

  • looking up the names of sheet attributes or Repeating Sections
  • Figure out RowID of something in a Repeating Section. Some sheets makes the RowID easy to find, but majority of sheet's don't.
  • Especially useful on newer by Roll20-sheets where we don't have public sourcecode for the sheet.
  • Can be quicker than searching through the public sourcecode
  • Looking at the roll macro as it's defined in the <button>-element, before it's sent to the chat.

Character Sheet Development

  • make live edits on you sheet and see how things change(like adjusting the width of a number input to look good)
  • inspecting other's sheets to se how they achieved some specific effect.
  • HTML/CSS debugging: figure out why something works or doesn't work in your code, to narrow down the problem, like why a css class is not working.
  • sheetworkers/javascript debugging: reading the web console to figure out what's going on with your sheetworkers. Open the console and keep an eye on it when you use the sheet like normally & see what it reports.
    • Example: If you add something like console.log("ifWounded is trigger") or console.log("Set strength mod to" + strmod)() in your sheetworkers, you can see what steps that take place, what is left out, and know what values your variables have at different stages.)
    • JS Debugging in Chrome, and in Firefox


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