Event.bubbles

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

概述

表示事件是否會向上冒泡傳遞。

語法

var bool = event.bubbles;

回傳一個布林值，若事件會向上冒泡傳遞則回傳 true。

備註

Only certain events can bubble. Events that do bubble have this property set to true. You can use this property to check if an event is allowed to bubble or not.

範例

js
function goInput(e) {
  // checks bubbles and
  if (!e.bubbles) {
    // passes event along if it's not
    passItOn(e);
  }
  // already bubbling
  doOutput(e);
}

規範

Specification
DOM Standard
# ref-for-dom-event-bubbles③