Reddit: log shadow-DOM components
Logs every Reddit custom element to the console and marks which ones have a shadow root, helping you write selectors.
Code to copy
// List custom elements that expose a shadow root, useful for writing selectors
function reportShadowRoots() {
const seen = {};
document.querySelectorAll('*').forEach(function (el) {
const tag = el.tagName.toLowerCase();
if (tag.indexOf('-') === -1) { return; }
if (seen[tag]) { return; }
seen[tag] = true;
if (el.shadowRoot) {
console.log('[jz] shadow root on <' + tag + '>', el.shadowRoot);
} else {
console.log('[jz] light-DOM custom element <' + tag + '>');
}
});
console.log('[jz] ' + Object.keys(seen).length + ' distinct custom elements found');
}
reportShadowRoots();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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