Twitch: outline elements with stable selectors
Outlines every element with a data-a-target attribute and shows its value on hover to help write styles.
Code to copy
// Outline every element that exposes a stable data-a-target attribute
const STYLE_ID = 'jz-twch-outline';
if (document.getElementById(STYLE_ID)) {
document.getElementById(STYLE_ID).remove();
} else {
const s = document.createElement('style');
s.id = STYLE_ID;
s.textContent = '[data-a-target]{outline:1px solid #9147ff!important}'
+ '[data-a-target]:hover::after{content:attr(data-a-target);'
+ 'position:absolute;background:#9147ff;color:#fff;font-size:11px;'
+ 'padding:1px 4px;z-index:99999}';
document.head.appendChild(s);
}How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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