WhatsApp Web: mark all as read on focus
When you switch back to the WhatsApp tab, clicks each unread chat to zero the counters.
Code to copy
// When the tab regains focus, click each unread chat once to mark it as read
function markAllRead() {
const unread = document.querySelectorAll('div[role="listitem"] span[aria-label*="unread message" i], div[role="listitem"]:has(span[aria-label*="unread" i])');
unread.forEach(function (row) {
const clickable = row.closest('div[role="listitem"]');
if (clickable) { clickable.click(); }
});
}
window.addEventListener('focus', function () { setTimeout(markAllRead, 400); });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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