Outlook: collapse folder groups
Automatically collapses expanded groups in the left folder tree to keep the pane tidy.
Code to copy
// Collapse expanded folder groups in the left pane to keep it tidy
function collapseGroups() {
document.querySelectorAll('div[role="tree"] div[role="treeitem"][aria-expanded="true"]')
.forEach(function (item) {
const twisty = item.querySelector('button[aria-label], i');
if (twisty && !item.dataset.jzCollapsed) {
item.dataset.jzCollapsed = '1';
twisty.click();
}
});
}
collapseGroups();
const obs = new MutationObserver(collapseGroups);
obs.observe(document.body, { childList: true, subtree: true });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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