JavaScript · DOM and events

addEventListener

Attaches an event handler. Pass { once: true } for one-shot listeners or an AbortSignal to remove later.

javascriptRunnable example javascript course

Syntax

el.addEventListener(type, handler)

Example

Try it

const el = document.createElement("button");
el.addEventListener("click", () => console.log("clicked"), { once: true });
el.click();

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.