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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/globaleventhandlers/onchange | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/globaleventhandlers/onchange/index.html b/files/zh-cn/web/api/globaleventhandlers/onchange/index.html new file mode 100644 index 0000000000..861bdf11f7 --- /dev/null +++ b/files/zh-cn/web/api/globaleventhandlers/onchange/index.html @@ -0,0 +1,43 @@ +--- +title: GlobalEventHandlers.onchange +slug: Web/API/GlobalEventHandlers/onchange +translation_of: Web/API/GlobalEventHandlers/onchange +--- +<p>{{ ApiRef() }}</p> + +<h3 id="Summary" name="Summary">概述</h3> + +<p><code>onchange</code>可以用来获取或设置当前元素的<code>change</code>事件的事件处理函数.</p> + +<h3 id="Syntax" name="Syntax">语法</h3> + +<pre class="eval">element.onchange = 事件处理函数 +</pre> + +<h3 id="Notes" name="Notes">备注</h3> + +<p>下面的伪代码演示了,在Mozilla中,onchange事件是如何触发的:</p> + +<pre> control.onfocus = focus; + control.onblur = blur; + function focus () { + original_value = control.value; + } + + function blur () { + if (control.value != original_value) + control.onchange(); + } +</pre> + +<p>因此,如果你在你的<code>focus</code>或<code>blur事件的处理函数里修改一个控件的值的话,</code>你可能遇到一些关于<code>change</code>事件意想不到的现象.另外, <code>change</code>事件是在<code>blur</code>事件发生之后才触发的. 这一点和IE不同.</p> + +<h3 id="Specification" name="Specification">规范</h3> + +<p>DOM Level 0不属于任何标准</p> + +<h3 id="See_Also" name="See_Also">相关链接</h3> + +<p><a class="external" href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-eventgroupings-htmlevents">DOM Level 2: HTML event types</a></p> + +<p>{{ languages( { "fr": "fr/DOM/element.onchange" ,"en": "en/DOM/element.onchange" } ) }}</p> |