From 218934fa2ed1c702a6d3923d2aa2cc6b43c48684 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:43:23 -0500 Subject: initial commit --- files/zh-tw/web/api/event/target/index.html | 134 ++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 files/zh-tw/web/api/event/target/index.html (limited to 'files/zh-tw/web/api/event/target') diff --git a/files/zh-tw/web/api/event/target/index.html b/files/zh-tw/web/api/event/target/index.html new file mode 100644 index 0000000000..9599be68c7 --- /dev/null +++ b/files/zh-tw/web/api/event/target/index.html @@ -0,0 +1,134 @@ +--- +title: Event.target +slug: Web/API/Event/target +translation_of: Web/API/Event/target +--- +

{{ApiRef("DOM")}}

+ +

指向最初觸發事件的 DOM 物件。與 {{domxref("event.currentTarget")}} 屬性不同的是，event.currentTarget 屬性總會指向目前於冒泡或捕捉階段正在處理該事件之事件處理器所註冊的 DOM 物件，而 event.target 屬性則是永遠指向觸發事件的 DOM 物件。

+ +

語法

+ +
theTarget = event.target
+ +

範例

+ +

The event.target property can be used in order to implement event delegation.

+ +
// Make a list
+var ul = document.createElement('ul');
+document.body.appendChild(ul);
+
+var li1 = document.createElement('li');
+var li2 = document.createElement('li');
+ul.appendChild(li1);
+ul.appendChild(li2);
+
+function hide(e){
+  // e.target refers to the clicked <li> element
+  // This is different than e.currentTarget which would refer to the parent <ul> in this context
+  e.target.style.visibility = 'hidden';
+}
+
+// Attach the listener to the list
+// It will fire when each <li> is clicked
+ul.addEventListener('click', hide, false);
+
+ +

規範

+ + + + + + + + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName("DOM WHATWG", "#dom-event-target", "Event.target")}}{{Spec2("DOM WHATWG")}} 
{{SpecName("DOM4", "#dom-event-target", "Event.target")}}{{Spec2("DOM4")}} 
{{SpecName("DOM2 Events", "#Events-Event-target", "Event.target")}}{{Spec2("DOM2 Events")}}Initial definition
+ +

瀏覽器相容性

+ +

{{CompatibilityTable}}

+ +
+ + + + + + + + + + + + + + + + + + + + + +
FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}
+
+ +
+ + + + + + + + + + + + + + + + + + + + + +
FeatureAndroidEdgeFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}
+
+ +

Compatibility notes

+ +

On IE 6-8 the event model is different. Event listeners are attached with the non-standard {{domxref('EventTarget.attachEvent')}} method. In this model, the event object has a {{domxref('Event.srcElement')}} property, instead of the target property, and it has the same semantics as event.target.

+ +
function hide(e) {
+  // Support IE6-8
+  var target = e.target || e.srcElement;
+  target.style.visibility = 'hidden';
+}
+
+ +

參見

+ + -- cgit v1.2.3-54-g00ecf