Event.defaultPrevented

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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概述

回傳一個布林值，表示事件的預設行為是否被取消，也就是事件物件是否曾執行 preventDefault() 方法。

備註： You should use this instead of the non-standard, deprecated getPreventDefault() method (see Firefox bug 691151).

bool = event.defaultPrevented;

if (e.defaultPrevented) {
  /* the default was prevented */
}

Specification
DOM # ref-for-dom-event-defaultprevented①