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Create one time event handler

Written byPhuoc Nguyen
Level 1 — Basic
24 Feb, 2020
Last updated
08 Mar, 2020

1. Use the once option

When attach a handler to given event, you can pass `{ once: true }` to the last parameter of the `addEventListener` method:
const handler = function (e) {
// The event handler

ele.addEventListener('event-name', handler, { once: true });
Note that this option isn't supported in IE.

2. Self-remove the handler

const handler = function (e) {
// The event handler
// Do something ...

// Remove the handler
e.target.removeEventListener(e.type, handler);

ele.addEventListener('event-name', handler);

Use case

See also

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