Fix $tw.utils.pulseElement()

[pmario]

Fix $tw.utils.pulseElement() — replace missing $tw.browser.animationEnd

Problem

$tw.utils.pulseElement() has been broken because it references $tw.browser.animationEnd, which was removed from the core and is undefined. The function silently fails — the event listener never fires, so the pulse CSS class is never cleaned up. Additionally, no .pulse CSS class was defined in the vanilla theme.

Fixes #6835

Changes

1. core/modules/utils/dom/dom.js — Replace $tw.browser.animationEnd with $tw.utils.convertEventName("animationEnd"), which already exists in the core and correctly resolves browser-specific animation end event names.

2. themes/tiddlywiki/vanilla/base.tid — Add .pulse CSS class and @keyframes pulse animation (lightgreen background flash, opacity 0.3→1 over 0.8s).

How to use

$tw.utils.pulseElement() is a debugging utility. It briefly highlights a DOM element with a green flash to help visualise which nodes are being rendered or refreshed.

Browser console:

// Pulse a specific tiddler frame
$tw.utils.pulseElement(document.querySelector(".tc-tiddler-frame"));

// Pulse the sidebar
$tw.utils.pulseElement(document.querySelector(".tc-sidebar-scrollable"));

From widget code (e.g. in a render or refresh method):

$tw.utils.pulseElement(this.domNodes[0]);

This is particularly useful when debugging widget refresh behaviour — add $tw.utils.pulseElement(this.domNodes[0]) to a widget's refresh() method to see exactly when and which elements get refreshed.

🤖 Generated with Claude Code

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PR	2487.4 KB

Diff: ⬆️ Increase: +0.2 KB

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[pmario]

@Jermolene ... I did manually test the function and it works for me. Then I did instruct Claude to create a new branch. Make a commit with a commit message. Push and create a new PR with the OP text.