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Event 介面的 isTrusted 唯讀屬性為一個布林值，若事件物件是由使用者操作而產生，則 isTrusted 值為 true。若事件物件是由程式碼所建立、修改，或是透過 EventTarget.dispatchEvent() 來觸發，則 isTrusted 值為 false。
語法
var bool = event.isTrusted;
範例
if (e.isTrusted) {
/* The event is trusted. */
} else {
/* The event is not trusted. */
}
規範
| Specification | Status | Comment |
|---|---|---|
| DOM The definition of 'Event.isTrusted' in that specification. |
Living Standard | |
| Document Object Model (DOM) Level 3 Events Specification The definition of 'Trusted events' in that specification. |
Working Draft | Adds requirements regarding trusted and untrusted events, though it does not itself define the isTrusted property. |
| DOM4 The definition of 'Event.isTrusted' in that specification. |
Recommendation | Initial definition. |
瀏覽器相容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 46.0 | (Yes) | No support [1] | 33 | No support |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | ? | 46.0 | (Yes) | ? | ? | 33 | No support | 46.0 |
[1] In Internet Explorer, all events are trusted except those that are created with the createEvent() method.