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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/javascript/reference/global_objects/array/@@species/index.html | |
| parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
| download | translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.gz translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.bz2 translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.zip | |
initial commit
Diffstat (limited to 'files/zh-cn/web/javascript/reference/global_objects/array/@@species/index.html')
| -rw-r--r-- | files/zh-cn/web/javascript/reference/global_objects/array/@@species/index.html | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/files/zh-cn/web/javascript/reference/global_objects/array/@@species/index.html b/files/zh-cn/web/javascript/reference/global_objects/array/@@species/index.html new file mode 100644 index 0000000000..cc87927e5e --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/array/@@species/index.html @@ -0,0 +1,78 @@ +--- +title: 'get Array[@@species]' +slug: Web/JavaScript/Reference/Global_Objects/Array/@@species +tags: + - JavaScript + - 原型 + - 数组 + - 方法 +translation_of: Web/JavaScript/Reference/Global_Objects/Array/@@species +--- +<div>{{JSRef}}</div> + +<p><code><strong>Array[@@species]</strong></code> 访问器属性返回 <code>Array</code> 的构造函数。</p> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox">Array[Symbol.species] +</pre> + +<h3 id="返回值">返回值</h3> + +<p>{{jsxref("Array")}} 的构造函数。</p> + +<h2 id="描述">描述</h2> + +<p><code>species</code> 访问器属性返回 <code>Array</code> 对象的默认构造函数。子类的构造函数可能会覆盖并改变构造函数的赋值。</p> + +<h2 id="示例">示例</h2> + +<p><code>species</code> 属性返回默认构造函数, 它用于 <code>Array</code> 对象的构造函数 <code>Array</code>:</p> + +<pre class="brush: js">Array[Symbol.species]; // function Array()</pre> + +<p>在继承类的对象中(例如你自定义的数组 <code>MyArray</code>),<code>MyArray</code> 的 <code>species</code> 属性返回的是 <code>MyArray</code> 这个构造函数. 然而你可能想要覆盖它,以便在你继承的对象 <code>MyArray</code> 中返回父类的构造函数 <code>Array</code> :</p> + +<pre class="brush: js">class MyArray extends Array { + // 重写 MyArray 的 species 属性到父类 Array 的构造函数 + static get [Symbol.species]() { return Array; } +}</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">规范</th> + <th scope="col">状态</th> + <th scope="col">备注</th> + </tr> + <tr> + <td>{{SpecName('ES6', '#sec-get-array-@@species', 'get Array [ @@species ]')}}</td> + <td>{{Spec2('ES6')}}</td> + <td>Initial definition.</td> + </tr> + <tr> + <td>{{SpecName('ESDraft', '#sec-get-array-@@species', 'get Array [ @@species ]')}}</td> + <td>{{Spec2('ESDraft')}}</td> + <td></td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<div> +<div> + + +<p>{{Compat("javascript.builtins.Array.@@species")}}</p> +</div> +</div> + +<h2 id="参见">参见</h2> + +<ul> + <li>{{jsxref("Array")}}</li> + <li>{{jsxref("Symbol.species")}}</li> +</ul> |
