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YouTube: focus the search box

Instantly puts the cursor in the search box and selects any existing text, ready for a new query.

Code to copy

// Focus the YouTube search box and select any existing text
const box = document.querySelector('input#search, ytd-searchbox input');
if (box) {
  box.focus();
  box.select();
} else {
  alert('Search box not found on this page.');
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's JavaScript panel and save — it runs on every page visit.