DOM
SourceIn all current engines.
Firefox1+Safari1+Chrome1+ Opera7+Edge79+ Edge (Legacy)12+IE9+ Firefox for Android4+iOS Safari1+Chrome for Android18+Android WebView1+Samsung Internet1.0+Opera Mobile10.1+ Node.js14.5.0+
The preventDefault() method steps are to set the canceled flag with this.
There are scenarios where invoking preventDefault() has no
effect. User agents are encouraged to log the precise cause in a developer console, to aid
debugging.
In all current engines.
Firefox6+Safari5+Chrome18+ Opera11+Edge79+ Edge (Legacy)12+IE9+ Firefox for Android6+iOS Safari5+Chrome for Android18+Android WebView37+Samsung Internet1.0+Opera Mobile11+ Node.js14.5.0+
The defaultPrevented getter steps are to return true
if this’s canceled flag is set; otherwise false.
In all current engines.
Firefox52+SafariYesChrome53+ Opera40+Edge79+ Edge (Legacy)NoneIENone Firefox for Android52+iOS SafariYesChrome for Android53+Android WebView53+Samsung Internet6.0+Opera Mobile41+ Node.js14.5.0+
The composed getter steps are to return true if this’s composed flag is set; otherwise false.
In all current engines.
FirefoxYesSafari10+Chrome46+ Opera33+Edge79+ Edge (Legacy)12+IENone Firefox for AndroidYesiOS Safari10+Chrome for Android46+Android WebView46+Samsung Internet5.0+Opera Mobile33+ Node.js14.5.0+
The isTrusted attribute must return the value it was
initialized to. When an event is created the attribute must be initialized to false.
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