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author | MDN <actions@users.noreply.github.com> | 2022-02-11 00:58:37 +0000 |
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committer | MDN <actions@users.noreply.github.com> | 2022-02-11 00:58:37 +0000 |
commit | 4873c5f1122ac800cf3c916a52df07e05ddc9dcf (patch) | |
tree | 0b63e7a2179d77b0b20eac780dba8d8cb35355f4 /files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html | |
parent | 633d212cfb9c7a5838f350ff88264e460ef0398e (diff) | |
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Diffstat (limited to 'files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html')
-rw-r--r-- | files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html | 114 |
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diff --git a/files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html b/files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html new file mode 100644 index 0000000000..79d776fec6 --- /dev/null +++ b/files/zh-tw/web/api/xmlhttprequest/readystatechange_event/index.html @@ -0,0 +1,114 @@ +--- +title: XMLHttpRequest.onreadystatechange +slug: Web/API/XMLHttpRequest/readystatechange_event +translation_of: Web/API/XMLHttpRequest/onreadystatechange +original_slug: Web/API/XMLHttpRequest/onreadystatechange +--- +<div>{{APIRef}}</div> + +<p>An <a href="/docs/Web/API/EventHandler" title="A possible way to get notified of Events of a particular type (such as click) for a given object is to specify an event handler using:"><code>EventHandler</code></a> that is called whenever the <code>readyState</code> attribute changes. The callback is called from the user interface thread. The <strong><code>XMLHttpRequest.onreadystatechange</code></strong> property contains the event handler to be called when the {{event("readystatechange")}} event is fired, that is every time the {{domxref("XMLHttpRequest.readyState", "readyState")}} property of the {{domxref("XMLHttpRequest")}} changes.</p> + +<div class="warning"> +<p><strong>Warning:</strong> This should not be used with synchronous requests and must not be used from native code.</p> +</div> + +<p>The <code>readystatechange</code> event will not be fired when an <code>XMLHttpRequest</code> request is cancelled with the <a href="/docs/Web/API/XMLHttpRequest/abort">abort()</a> method.</p> + +<div class="note"> +<p>UPDATE: it's firing in the latest version of browsers (Firefox 51.0.1, Opera 43.0.2442.991, Safari 10.0.3 (12602.4.8), Chrome 54.0.2840.71, Edge, IE11). Example <a href="https://jsfiddle.net/merksam/ve5oc0gn/">here</a> - just reaload page few times.</p> +</div> + +<h2 id="Syntax" name="Syntax">語法</h2> + +<pre class="syntaxbox"><em>XMLHttpRequest</em>.onreadystatechange = <em>callback</em>;</pre> + +<h3 id="值">值</h3> + +<ul> + <li><code><em>callback</em></code> is the function to be executed when the <code>readyState</code> changes.</li> +</ul> + +<h2 id="Example" name="Example">範例</h2> + +<pre class="brush: js">var xhr = new XMLHttpRequest(), + method = "GET", + url = "https://developer.mozilla.org/"; + +xhr.open(<em>method</em>, <em>url</em>, true); +xhr.onreadystatechange = function () { + if(xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) { + console.log(xhr.responseText); + } + }; +xhr.send();</pre> + +<h2 id="規範">規範</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('XMLHttpRequest', '#handler-xhr-onreadystatechange')}}</td> + <td>{{Spec2('XMLHttpRequest')}}</td> + <td>WHATWG living standard</td> + </tr> + </tbody> +</table> + +<h2 id="瀏覽器相容性">瀏覽器相容性</h2> + +<p>{{CompatibilityTable}}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatChrome(1)}}</td> + <td>{{CompatGeckoDesktop(1.0)}}</td> + <td>{{CompatIe(7)}}<sup>[1]</sup></td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatSafari(1.2)}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatUnknown}}</td> + <td>1.0</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<p>[1] Internet Explorer version 5 and 6 supported ajax calls using <code>ActiveXObject()</code>.</p> |