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listenOnce javascript Code Snippet in 2024

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Last Updated: 18 February 2024

Adds an event listener to an element that will only run the callback the first time the event is triggered.

  • Use EventTarget.addEventListener() to add an event listener to an element.
  • Use { once: true } as options to only run the given callback once.
const listenOnce = (el, evt, fn) => el.addEventListener(evt, fn, { once: true });
listenOnce( document.getElementById('my-id'), 'click', () => console.log('Hello world') ); // 'Hello world' will only be logged on the first click

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