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docs/javascript/Reference/Global_Objects/Object/noSuchMethod.html
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@@ -3,13 +3,13 @@
<p><strong><code>__noSuchMethod__</code></strong> 属性曾经是指当调用某个对象里不存在的方法时即将被执行的函数，但是现在这个函数已经不可用。</p>
<p><code><font face="Open Sans, Arial, sans-serif">在</font><strong>__noSuchMethod__</strong></code> 属性被移除之后，ECMAScript 2015 (ES6) 规范转而采用 <a href="Reference/Global_Objects/Proxy" title="Proxy 对象用于定义基本操作的自定义行为（如属性查找，赋值，枚举，函数调用等）。"><code>Proxy</code></a> 对象， 可以实现下面的效果（以及更多）。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"><code><var>obj</var>.__noSuchMethod__ = <var>fun</var></code></pre>
<pre><code class="language-javascript"><code><var>obj</var>.__noSuchMethod__ = <var>fun</var></code></code></pre>
<h3 id="参数">参数</h3>
<dl>
<dt><code>fun</code></dt>
<dd>函数形式如下：</dd>
<dd>
<pre class="brush: js"><code>function (<var>id</var>, <var>args</var>) { . . . }</code></pre>
<pre><code class="language-javascript"><code>function (<var>id</var>, <var>args</var>) { . . . }</code></code></pre>
<dl>
<dt><code>id</code></dt>
<dd>调用的不存在的方法名</dd>
@@ -24,7 +24,7 @@
<p>If this method cannot be called, either as if <code>undefined</code> by default, if deleted, or if manually set to a non-function, the JavaScript engine will revert to throwing <code>TypeError</code>s.</p>
<h2 id="Examples">Examples</h2>
<h3 id="Simple_test_of___noSuchMethod__">Simple test of <code>__noSuchMethod__</code></h3>
<pre class="brush: js">var o = {
<pre><code class="language-javascript">var o = {
__noSuchMethod__: function(id, args) {
console.log(id, '(' + args.join(', ') + ')');
}
@@ -38,10 +38,10 @@ o.baz();
// foo (1, 2, 3)
// bar (4, 5)
// baz ()
</pre>
</code></pre>
<h3 id="Using___noSuchMethod___to_simulate_multiple_inheritance">Using <code>__noSuchMethod__</code> to simulate multiple inheritance</h3>
<p>An example of code that implements a primitive form of multiple inheritance is shown below.</p>
<pre class="brush: js">// Doesn't work with multiple inheritance objects as parents
<pre><code class="language-javascript">// Doesn't work with multiple inheritance objects as parents
function noMethod(name, args) {
var parents = this.__parents_;
@@ -68,9 +68,9 @@ function addParent(obj, parent) {
// Add the parent
obj.__parents_.push(parent);
}
</pre>
</code></pre>
<p>An example of using this idea is shown below.</p>
<pre class="brush: js">// Example base class 1
<pre><code class="language-javascript">// Example base class 1
function NamedThing(name){
this.name=name;
}
@@ -124,7 +124,7 @@ console.log("getAddr is " + (("getAddr" in bob) ? "in" : "not in") + " bob");
console.log("bob's address is: " + bob.getAddr());
// bob's address is: New York
</pre>
</code></pre>
<h2 id="Specifications">Specifications</h2>
<p>Not part of any specifications. This feature has been removed, see <a class="external" href="https://bugzilla.mozilla.org/show_bug.cgi?id=683218" rel="noopener" title="FIXED: can we remove __noSuchMethod__, use proxies instead?">bug 683218</a>.</p>
<h2 id="Browser_compatibility">Browser compatibility</h2>