wasn't supposed to be orphaned (zh-cn) (#1674)

* wasn't supposed to be orphaned (zh-cn)

* fix redirects

* fix slug front-matter

15 files changed, 1625 insertions, 0 deletions

diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/@@iterator/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/@@iterator/index.html
new file mode 100644
index 0000000000..f0528e4189
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/@@iterator/index.html
@@ -0,0 +1,104 @@
+---
+title: Map.prototype[@@iterator]()
+slug: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+tags:
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/@@iterator
+browser-compat: javascript.builtins.Map.@@iterator
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>@@iterator</strong></code><strong> </strong>属性的初始值与 {{jsxref("Map.prototype.entries()", "entries")}} 属性的初始值是同一个函数对象。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-@@iterator.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>[Symbol.iterator]</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>map 的 <strong>iterator</strong> 函数默认就是 {{jsxref("Map.prototype.entries()", "entries()")}} 函数。</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_iterator()">使用 <code>[@@iterator]()</code></h3>
+
+<pre class="brush:js">var myMap = new Map();
+myMap.set('0', 'foo');
+myMap.set(1, 'bar');
+myMap.set({}, 'baz');
+
+var mapIter = myMap[Symbol.iterator]();
+//返回的其实是个generator
+console.log(mapIter.next().value); // ["0", "foo"]
+console.log(mapIter.next().value); // [1, "bar"]
+console.log(mapIter.next().value); // [Object, "baz"]
+</pre>
+
+<h3 id="在for..of中使用iterator()">在<code>for..of中</code>使用<code>[@@iterator]()</code> </h3>
+
+<pre class="brush:js">var myMap = new Map();
+myMap.set('0', 'foo');
+myMap.set(1, 'bar');
+myMap.set({}, 'baz');
+
+for (const entry of myMap) {
+  console.log(entry);
+}
+// ["0", "foo"]
+// [1, "bar"]
+// [{}, "baz"]
+
+for (var v of myMap) {
+  console.log(v);
+}
+
+// 0: foo
+// 1: bar
+// [Object]: baz</pre>
+
+<h2 id="规范">规范</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('ES2015', '#sec-map.prototype-@@iterator', 'Map.prototype[@@iterator]()')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype-@@iterator', 'Map.prototype[@@iterator]()')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map.@@iterator")}}</p>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{jsxref("Map.prototype.entries()")}}</li>
+ <li>{{jsxref("Map.prototype.keys()")}}</li>
+ <li>{{jsxref("Map.prototype.values()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/@@species/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/@@species/index.html
new file mode 100644
index 0000000000..b34c711929
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/@@species/index.html
@@ -0,0 +1,74 @@
+---
+title: get Map[@@species]
+slug: Web/JavaScript/Reference/Global_Objects/Map/@@species
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Property
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/@@species
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/@@species
+browser-compat: javascript.builtins.Map.@@species
+---
+<div>{{JSRef}}</div>
+
+<p> <code><strong>Map[@@species]</strong></code> 访问器属性会返回一个 <code>Map</code> 构造函数.</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">Map[Symbol.species]
+</pre>
+
+<h2 id="描述">描述</h2>
+
+<p>The species accessor property returns the default constructor for <code>Map</code> objects. Subclass constructors may over-ride it to change the constructor assignment.</p>
+
+<h2 id="案例">案例</h2>
+
+<p>The species property returns the default constructor function, which is the <code>Map</code> constructor for <code>Map</code> objects:</p>
+
+<pre class="brush: js">Map[Symbol.species]; // function Map()</pre>
+
+<p>In a derived collection object (e.g. your custom map <code>MyMap</code>), the <code>MyMap</code> species is the <code>MyMap</code> constructor. However, you might want to overwrite this, in order to return parent <code>Map</code> objects in your derived class methods:</p>
+
+<pre class="brush: js">class MyMap extends Map {
+  // 重写覆盖 MyMap species to the parent Map constructor
+  static get [Symbol.species]() { return Map; }
+}</pre>
+
+<h2 id="规范">规范</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('ES2015', '#sec-get-map-@@species', 'get Map [ @@species ]')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-get-map-@@species', 'get Map [ @@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>
+
+
+<p>{{Compat("javascript.builtins.Map.@@species")}}</p>
+</div>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+ <li>{{jsxref("Symbol.species")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/@@tostringtag/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/@@tostringtag/index.html
new file mode 100644
index 0000000000..46132abe7f
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/@@tostringtag/index.html
@@ -0,0 +1,104 @@
+---
+title: Map.prototype[@@toStringTag]
+slug: Web/JavaScript/Reference/Global_Objects/Map/@@toStringTag
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Property
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/@@toStringTag
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/@@toStringTag
+browser-compat: javascript.builtins.Map.@@toStringTag
+---
+<div>{{JSRef}}</div>
+
+<p> <strong><code>Map[@@toStringTag]</code></strong> 的初始值是"Map".</p>
+
+<div>{{js_property_attributes(0,0,1)}}</div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">Map[Symbol.toStringTag]</pre>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush:js">Object.prototype.toString.call(new Map()) // "[object Map]"
+</pre>
+
+<h2 id="规范">规范</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('ES2015', '#sec-map.prototype-@@tostringtag', 'Map.prototype[@@toStringTag]')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype-@@tostringtag', 'Map.prototype[@@toStringTag]')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</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(44.0) }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{ CompatNo }}</td>
+   <td>{{ CompatChrome(44.0) }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(44.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/clear/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/clear/index.html
new file mode 100644
index 0000000000..a83f6d78bb
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/clear/index.html
@@ -0,0 +1,81 @@
+---
+title: Map.prototype.clear()
+slug: Web/JavaScript/Reference/Global_Objects/Map/clear
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/clear
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/clear
+browser-compat: javascript.builtins.Map.clear
+---
+<div>{{JSRef}}</div>
+
+<p><code>clear()</code>方法会移除Map对象中的所有元素。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-clear.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>.clear();</code>
+</pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>{{jsxref("undefined")}}.</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="调用clear方法">调用<code>clear</code>方法</h3>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set("bar", "baz");
+myMap.set(1, "foo");
+
+myMap.size;       // 2
+myMap.has("bar"); // true
+
+myMap.clear();
+
+myMap.size;       // 0
+myMap.has("bar")  // false
+</pre>
+
+<h2 id="规范">规范</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('ES2015', '#sec-map.prototype.clear', 'Map.prototype.clear')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.clear', 'Map.prototype.clear')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map.clear")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html
new file mode 100644
index 0000000000..6bbd943f7f
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html
@@ -0,0 +1,82 @@
+---
+title: Map.prototype.delete()
+slug: Web/JavaScript/Reference/Global_Objects/Map/delete
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/delete
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/delete
+browser-compat: javascript.builtins.Map.delete
+---
+<div>{{JSRef}}</div>
+
+<p><strong> </strong><code><strong><strong>delete()</strong></strong></code><strong> </strong>方法用于移除 <code>Map</code> 对象中指定的元素。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-delete.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush: js">myMap.delete(key);</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>key</dt>
+ <dd>必须。从 <code>Map</code> 对象中移除的元素的键。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<dl>
+ <dt>Boolean</dt>
+ <dd>如果 <code>Map</code> 对象中存在该元素，则移除它并返回<em> <code>true</code></em>；否则如果该元素不存在则返回 <code><em>false</em></code>。</dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_delete_方法">使用 <code>delete</code> 方法</h3>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set("bar", "foo");
+
+myMap.delete("bar"); // 返回 true。成功地移除元素
+myMap.has("bar");    // 返回 false。"bar" 元素将不再存在于 Map 实例中
+</pre>
+
+<h2 id="规范">规范</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('ES6', '#sec-map.prototype.delete', 'Map.prototype.delete')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.delete', 'Map.prototype.delete')}}</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>
+
+<p>{{Compat("javascript.builtins.Map.delete")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/entries/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/entries/index.html
new file mode 100644
index 0000000000..db24574461
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/entries/index.html
@@ -0,0 +1,79 @@
+---
+title: Map.prototype.entries()
+slug: Web/JavaScript/Reference/Global_Objects/Map/entries
+tags:
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/entries
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/entries
+browser-compat: javascript.builtins.Map.entries
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>entries()</strong></code> 方法返回一个新的包含 <code>[key, value]</code> 对的 <code><strong>Iterator</strong></code> 对象，返回的迭代器的迭代顺序与 <code>Map</code> 对象的插入顺序相同。</p>
+
+<p>{{EmbedInteractiveExample("pages/js/map-prototype-entries.html")}}</p>
+
+<h2 id="语法">语法</h2>
+
+<pre><code><var>myMap</var>.entries()</code>
+</pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个新的 {{jsxref("Map")}} 迭代器对象.</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="entries()的使用"><code>entries()</code>的使用</h3>
+
+<pre class="brush:js">var myMap = new Map();
+myMap.set("0", "foo");
+myMap.set(1, "bar");
+myMap.set({}, "baz");
+
+var mapIter = myMap.entries();
+
+console.log(mapIter.next().value); // ["0", "foo"]
+console.log(mapIter.next().value); // [1, "bar"]
+console.log(mapIter.next().value); // [Object, "baz"]
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table>
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.entries', 'Map.prototype.entries')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td></td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-map.prototype.entries', 'Map.prototype.entries')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{Compat("javascript.builtins.Map.entries")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Map.prototype.keys()")}}</li>
+ <li>{{jsxref("Map.prototype.values()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/foreach/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/foreach/index.html
new file mode 100644
index 0000000000..301214807e
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/foreach/index.html
@@ -0,0 +1,111 @@
+---
+title: Map.prototype.forEach()
+slug: Web/JavaScript/Reference/Global_Objects/Map/forEach
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/forEach
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/forEach
+browser-compat: javascript.builtins.Map.forEach
+---
+<div>{{JSRef}}</div>
+
+<p><span class="seoSummary"><code><strong>forEach()</strong></code> 方法按照插入顺序依次对 <code>Map</code> 中每个键/值对执行一次给定的函数</span></p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-foreach.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate"><code><var>myMap</var>.forEach(<var>callback([<var>value</var>][,<var>key</var>][,<var>map</var>])[, <var>thisArg</var>])</var></code></pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code><var>callback</var></code></dt>
+ <dd>
+ <p><code><var>myMap</var></code> 中每个元素所要执行的函数。它具有如下的参数</p>
+
+ <dl>
+  <dt><code><var>value</var></code> {{Optional_Inline}}</dt>
+  <dd>每个迭代的值。</dd>
+  <dt><code><var>key</var></code> {{Optional_Inline}}</dt>
+  <dd>每个迭代的键。</dd>
+  <dt><code><var>map</var></code> {{Optional_Inline}}</dt>
+  <dd>被迭代的map（上文语法框中的 <code><var>myMap</var></code>）。</dd>
+ </dl>
+ </dd>
+ <dt><code><var>thisArg</var></code> {{Optional_Inline}}</dt>
+ <dd>在 <code><var>callback</var></code> 执行中使用的 <code>this</code> 的值。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>{{jsxref("undefined")}}.</p>
+
+<h2 id="描述">描述</h2>
+
+<p><code>forEach</code> 方法会对map中每个真实存在的键执行一次给定的 <code><var>callback</var></code> 函数。它不会对被删除的键执行函数。然而，它会对每个值为 <code>undefined</code> 的键执行函数。</p>
+
+<p><code><var>callback</var></code> 接收<strong>三个参数</strong>：</p>
+
+<ul>
+ <li>当前的 <code><var>value</var></code></li>
+ <li>当前的 <code><var>key</var></code></li>
+ <li>正在被遍历的 <strong><code>Map</code> 对象</strong></li>
+</ul>
+
+<p>如果 <code>forEach</code> 中含有 <code><var>thisArg</var></code> 参数，那么每次 <code><var>callback</var></code> 被调用时，都会被用作 <code>this</code> 的值。否则，<code>undefined</code> 将会被用作 <code>this</code> 的值。按照<a href="/en-US/docs/Web/JavaScript/Reference/Operators/this">函数观察到 <code>this</code> 的常用规则</a>，<code><var>callback</var></code> 函数最终可观察到 <code>this</code> 值。</p>
+
+<p>每个值只被访问一次，除非它被删除了或者在 <code>forEach</code> 结束前被改变了。<code><var>callback</var></code> 不会对在被访问前就删除的元素执行。在 <code>forEach</code> 结束前被添加的元素将会被访问。</p>
+
+<p><code>forEach</code> 会对 <code>Map</code> 对象中的每个元素执行一次 <code><var>callback</var></code>。它不会返回值。</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="输出一个_Map_对象中的内容">输出一个 <code>Map</code> 对象中的内容</h3>
+
+<p>以下的代码在每行中打印一个 <code>Map</code> 对象中的元素</p>
+
+<pre class="brush:js notranslate">function logMapElements(value, key, map) {
+    console.log(`map.get('${key}') = ${value}`)
+}
+new Map([['foo', 3], ['bar', {}], ['baz', undefined]]).forEach(logMapElements)
+// logs:
+// "map.get('foo') = 3"
+// "map.get('bar') = [object Object]"
+// "map.get('baz') = undefined"
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">规范</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.foreach', 'Map.prototype.forEach')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map.forEach")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Array.prototype.forEach()")}}</li>
+ <li>{{jsxref("Set.prototype.forEach()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/get/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/get/index.html
new file mode 100644
index 0000000000..934f5d9d08
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/get/index.html
@@ -0,0 +1,83 @@
+---
+title: Map.prototype.get()
+slug: Web/JavaScript/Reference/Global_Objects/Map/get
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/get
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/get
+browser-compat: javascript.builtins.Map.get
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>get()</strong></code> 方法返回某个 <code>Map</code> 对象中的一个指定元素。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-get.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>.get(key);</code></pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>key</dt>
+ <dd>必须参数，也是它唯一的参数，要从目标 <code>Map</code> 对象中获取的元素的键。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>返回一个 <code>Map</code> 对象中与指定键相关联的值，如果找不到这个键则返回 <code>undefined</code>。</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_get_方法">使用 <code>get</code> 方法</h3>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set("bar", "foo");
+
+myMap.get("bar");  // 返回 "foo"
+myMap.get("baz");  // 返回 undefined
+</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('ES2015', '#sec-map.prototype.get', 'Map.prototype.get')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.get', 'Map.prototype.get')}}</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>
+
+
+
+<p>{{Compat("javascript.builtins.Map.get")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+ <li>{{jsxref("Map.prototype.set()")}}</li>
+ <li>{{jsxref("Map.prototype.has()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/has/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/has/index.html
new file mode 100644
index 0000000000..db61579557
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/has/index.html
@@ -0,0 +1,123 @@
+---
+title: Map.prototype.has()
+slug: Web/JavaScript/Reference/Global_Objects/Map/has
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/has
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/has
+browser-compat: javascript.builtins.Map.has
+---
+<div>{{JSRef}}</div>
+
+<p>方法<code><strong>has()</strong></code> 返回一个bool值，用来表明map 中是否存在指定元素.</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>.has(key);</code></pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>key</dt>
+ <dd>必填. 用来检测是否存在指定元素的键值.</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<dl>
+ <dt>Boolean</dt>
+ <dd>如果指定元素存在于Map中，则返回true。其他情况返回false</dd>
+</dl>
+
+<h2 id="案例">案例</h2>
+
+<h3 id="使用has方法">使用has方法</h3>
+
+<pre class="brush: js">var myMap = new Map();
+myMap.set("bar", "foo");
+
+myMap.has("bar");  // returns true
+myMap.has("baz");  // returns false
+</pre>
+
+<h2 id="规范列表">规范列表</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范名称</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-map.prototype.has', 'Map.prototype.has')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>浏览器</th>
+   <th>Chrome谷歌</th>
+   <th>Firefox (Gecko)火狐</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>兼容版本</td>
+   <td>38</td>
+   <td>{{CompatGeckoDesktop("13.0")}}</td>
+   <td>11</td>
+   <td>25</td>
+   <td>7.1</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>浏览器</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>兼容版本</td>
+   <td>{{CompatNo}}</td>
+   <td>38</td>
+   <td>{{CompatGeckoMobile("13.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>8</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+ <li>{{jsxref("Map.prototype.set()")}}</li>
+ <li>{{jsxref("Map.prototype.get()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/index.html
new file mode 100644
index 0000000000..88ab546cf7
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/index.html
@@ -0,0 +1,341 @@
+---
+title: Map
+slug: Web/JavaScript/Reference/Global_Objects/Map
+tags:
+  - Class
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Reference
+  - Polyfill
+translation_of: Web/JavaScript/Reference/Global_Objects/Map
+original_slug: Web/JavaScript/Reference/Global_Objects/Map
+browser-compat: javascript.builtins.Map
+---
+<div>
+<div>{{JSRef}}</div>
+</div>
+
+<p><strong><code>Map</code></strong> 对象保存键值对，并且能够记住键的原始插入顺序。任何值(对象或者{{Glossary("Primitive", "原始值")}}) 都可以作为一个键或一个值。</p>
+
+<dl>
+</dl>
+
+<h2 id="描述">描述</h2>
+
+<p>一个Map对象在迭代时会根据对象中元素的插入顺序来进行 — 一个  {{jsxref("Statements/for...of", "for...of")}} 循环在每次迭代后会返回一个形式为[key，value]的数组。</p>
+
+<h3 id="键的相等Key_equality">键的相等(Key equality)</h3>
+
+<ul>
+ <li>键的比较是基于 <code><a href="/zh-CN/docs/Web/JavaScript/Equality_comparisons_and_sameness#零值相等">sameValueZero</a></code> 算法：</li>
+ <li>{{jsxref("NaN")}} 是与 <code>NaN</code> 相等的（虽然 <code>NaN !== NaN</code>），剩下所有其它的值是根据 <code>===</code> 运算符的结果判断是否相等。</li>
+ <li>在目前的ECMAScript规范中，<code>-0</code>和<code>+0</code>被认为是相等的，尽管这在早期的草案中并不是这样。有关详细信息，请参阅<a href="https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Map#浏览器兼容性">浏览器兼容性</a> 表中的“Value equality for -0 and 0”。</li>
+</ul>
+
+<h3 id="Objects_和_maps_的比较">Objects 和 maps 的比较</h3>
+
+<p>{{jsxref("Object", "Objects")}} 和 <code>Maps</code> 类似的是，它们都允许你按键存取一个值、删除键、检测一个键是否绑定了值。因此（并且也没有其他内建的替代方式了）过去我们一直都把对象当成 <code>Maps</code> 使用。不过 <code>Maps</code> 和 <code>Objects</code> 有一些重要的区别，在下列情况里使用 <code>Map</code> 会是更好的选择：</p>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="row"></th>
+   <th scope="col">Map</th>
+   <th scope="col">Object</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <th scope="row">意外的键</th>
+   <td><code>Map</code> 默认情况不包含任何键。只包含显式插入的键。</td>
+   <td>
+    <p>一个 <code>Object</code> 有一个原型, 原型链上的键名有可能和你自己在对象上的设置的键名产生冲突。</p>
+
+    <div class="blockIndicator note">
+    <p><strong>注意:</strong> 虽然 ES5 开始可以用 <code>Object.create(null)</code> 来创建一个没有原型的对象，但是这种用法不太常见。</p>
+    </div>
+   </td>
+  </tr>
+  <tr>
+   <th scope="row">键的类型</th>
+   <td>一个 <code>Map</code>的键可以是<strong>任意值</strong>，包括函数、对象或任意基本类型。</td>
+   <td>一个<code>Object</code> 的键必须是一个 {{jsxref("String")}} 或是{{jsxref("Symbol")}}。</td>
+  </tr>
+  <tr>
+   <th scope="row">键的顺序</th>
+   <td>
+    <p><code>Map</code> 中的 key 是有序的。因此，当迭代的时候，一个 <code>Map</code> 对象以插入的顺序返回键值。</p>
+   </td>
+   <td>
+    <p>一个 <code>Object</code> 的键是无序的</p>
+
+    <div class="blockIndicator note">
+    <p>注意：自ECMAScript 2015规范以来，对象<em>确实</em>保留了字符串和Symbol键的创建顺序； 因此，在只有字符串键的对象上进行迭代将按插入顺序产生键。</p>
+    </div>
+   </td>
+  </tr>
+  <tr>
+   <th scope="row">Size</th>
+   <td> <code>Map</code> 的键值对个数可以轻易地通过{{jsxref("Map.prototype.size", "size")}} 属性获取</td>
+   <td><code>Object</code> 的键值对个数只能手动计算</td>
+  </tr>
+  <tr>
+   <th scope="row">迭代</th>
+   <td><code>Map</code> 是 <a href="/en-US/docs/Web/JavaScript/Guide/iterable">iterable</a> 的，所以可以直接被迭代。</td>
+   <td>迭代一个<code>Object</code>需要以某种方式获取它的键然后才能迭代。</td>
+  </tr>
+  <tr>
+   <th scope="row">性能</th>
+   <td>
+    <p>在频繁增删键值对的场景下表现更好。</p>
+   </td>
+   <td>
+    <p>在频繁添加和删除键值对的场景下未作出优化。</p>
+   </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="构造函数">构造函数</h2>
+
+<dl>
+ <dt>{{jsxref("Global_Objects/Map/Map", "Map()")}}</dt>
+ <dd>创建 <code>Map</code> 对象</dd>
+</dl>
+
+<h2 id="属性">属性</h2>
+
+<dl>
+ <dt><code>Map.length</code></dt>
+ <dd>属性 length 的值为 0 。<br>
+ 想要计算一个<code>Map</code> 中的条目数量， 使用 {{jsxref("Map.prototype.size")}}.</dd>
+ <dt>{{jsxref("Map.@@species", "get Map[@@species]")}}</dt>
+ <dd>本构造函数用于创建派生对象。</dd>
+ <dt>{{jsxref("Map.prototype")}}</dt>
+ <dd>表示 <code>Map</code> 构造器的原型。 允许添加属性从而应用于所有的 <code>Map</code> 对象。</dd>
+</dl>
+
+<h2 id="Map_实例"><code>Map</code> 实例</h2>
+
+<p><font face="Open Sans, Arial, sans-serif">所有的 </font><code>Map</code> 对象实例都会继承 {{jsxref("Map.prototype")}}。</p>
+
+<h3 id="属性_2">属性</h3>
+
+<p>{{page('zh-CN/Web/JavaScript/Reference/Global_Objects/Map/prototype','属性')}}</p>
+
+<h3 id="方法">方法</h3>
+
+<p>{{page('zh-CN/Web/JavaScript/Reference/Global_Objects/Map/prototype','方法')}}</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_Map_对象">使用 <code>Map</code> 对象</h3>
+
+<pre class="brush: js">let myMap = new Map();
+
+let keyObj = {};
+let keyFunc = function() {};
+let keyString = 'a string';
+
+// 添加键
+myMap.set(keyString, "和键'a string'关联的值");
+myMap.set(keyObj, "和键keyObj关联的值");
+myMap.set(keyFunc, "和键keyFunc关联的值");
+
+myMap.size; // 3
+
+// 读取值
+myMap.get(keyString);    // "和键'a string'关联的值"
+myMap.get(keyObj);       // "和键keyObj关联的值"
+myMap.get(keyFunc);      // "和键keyFunc关联的值"
+
+myMap.get('a string');   // "和键'a string'关联的值"
+                         // 因为keyString === 'a string'
+myMap.get({});           // undefined, 因为keyObj !== {}
+myMap.get(function() {}); // undefined, 因为keyFunc !== function () {}</pre>
+
+<h3 id="将_NaN_作为_Map_的键">将 <code>NaN</code> 作为 <code>Map</code> 的键</h3>
+
+<p><code>NaN</code> 也可以作为<code>Map</code>对象的键。虽然 <code>NaN</code> 和任何值甚至和自己都不相等(<code>NaN !== NaN</code> 返回true)，但下面的例子表明，<code>NaN</code>作为Map的键来说是没有<span><span>区别的</span></span>:</p>
+
+<pre class="brush: js">let myMap = new Map();
+myMap.set(NaN, "not a number");
+
+myMap.get(NaN); // "not a number"
+
+let otherNaN = Number("foo");
+myMap.get(otherNaN); // "not a number"
+</pre>
+
+<h3 id="使用_for..of_方法迭代_Map">使用 <code>for..of</code> 方法迭代 <code>Map</code></h3>
+
+<p><code>Map</code>可以使用<code>for..of</code>循环来实现迭代：</p>
+
+<pre class="brush: js">let myMap = new Map();
+myMap.set(0, "zero");
+myMap.set(1, "one");
+for (let [key, value] of myMap) {
+  console.log(key + " = " + value);
+}
+// 将会显示两个log。一个是"0 = zero"另一个是"1 = one"
+
+for (let key of myMap.keys()) {
+  console.log(key);
+}
+// 将会显示两个log。 一个是 "0" 另一个是 "1"
+
+for (let value of myMap.values()) {
+  console.log(value);
+}
+// 将会显示两个log。 一个是 "zero" 另一个是 "one"
+
+for (let [key, value] of myMap.entries()) {
+  console.log(key + " = " + value);
+}
+// 将会显示两个log。 一个是 "0 = zero" 另一个是 "1 = one"</pre>
+
+<h3 id="使用_forEach_方法迭代_Map">使用 <code>forEach()</code> 方法迭代 <code>Map</code></h3>
+
+<p><code>Map</code>也可以通过<code>forEach()</code>方法迭代：</p>
+
+<pre class="brush: js">myMap.forEach(function(value, key) {
+  console.log(key + " = " + value);
+})
+// 将会显示两个logs。 一个是 "0 = zero" 另一个是 "1 = one"
+</pre>
+
+<h3 id="Map_与数组的关系"><code>Map</code> 与数组的关系</h3>
+
+<pre class="brush: js">let kvArray = [["key1", "value1"], ["key2", "value2"]];
+
+// 使用常规的Map构造函数可以将一个二维键值对数组转换成一个Map对象
+let myMap = new Map(kvArray);
+
+myMap.get("key1"); // 返回值为 "value1"
+
+// 使用Array.from函数可以将一个Map对象转换成一个二维键值对数组
+console.log(Array.from(myMap)); // 输出和kvArray相同的数组
+
+// 更简洁的方法来做如上同样的事情，使用展开运算符
+console.log([...myMap]);
+
+// 或者在键或者值的迭代器上使用Array.from，进而得到只含有键或者值的数组
+console.log(Array.from(myMap.keys())); // 输出 ["key1", "key2"]
+</pre>
+
+<h3 id="复制或合并_Maps">复制或合并 <code>Maps</code></h3>
+
+<p>Map 能像数组一样被复制：</p>
+
+<pre class="brush: js">let original = new Map([
+  [1, 'one']
+]);
+
+let clone = new Map(original);
+
+console.log(clone.get(1)); // one
+console.log(original === clone); // false. 浅比较 不为同一个对象的引用
+</pre>
+
+<div class="blockIndicator note">
+<p>重要：请记住，<em>数据本身</em>未被克隆。</p>
+</div>
+
+<p>Map对象间可以进行合并，但是会保持键的唯一性。</p>
+
+<pre class="brush: js">let first = new Map([
+  [1, 'one'],
+  [2, 'two'],
+  [3, 'three'],
+]);
+
+let second = new Map([
+  [1, 'uno'],
+  [2, 'dos']
+]);
+
+// 合并两个Map对象时，如果有重复的键值，则后面的会覆盖前面的。
+// 展开运算符本质上是将Map对象转换成数组。
+let merged = new Map([...first, ...second]);
+
+console.log(merged.get(1)); // uno
+console.log(merged.get(2)); // dos
+console.log(merged.get(3)); // three</pre>
+
+<p>Map对象也能与数组合并：</p>
+
+<pre class="brush: js">let first = new Map([
+  [1, 'one'],
+  [2, 'two'],
+  [3, 'three'],
+]);
+
+let second = new Map([
+  [1, 'uno'],
+  [2, 'dos']
+]);
+
+// Map对象同数组进行合并时，如果有重复的键值，则后面的会覆盖前面的。
+let merged = new Map([...first, ...second, [1, 'eins']]);
+
+console.log(merged.get(1)); // eins
+console.log(merged.get(2)); // dos
+console.log(merged.get(3)); // three</pre>
+
+<h2 id="使用说明">使用说明</h2>
+
+<p>请注意！为Map设置对象属性也是可以的，但是可能引起大量的混乱。</p>
+
+<p>所以，你还是<em>可以这样做.</em>..</p>
+
+<pre class="syntaxbox example-bad brush js">let wrongMap = new Map()
+wrongMap['bla'] = 'blaa'
+wrongMap['bla2'] = 'blaaa2'
+
+console.log(wrongMap)  // Map { bla: 'blaa', bla2: 'blaaa2' }
+</pre>
+
+<p>...但是，这样做的话，它的行为会不符合预期:</p>
+
+<pre class="syntaxbox example-bad brush js">wrongMap.has('bla')    // false
+wrongMap.delete('bla') // false
+console.log(wrongMap)  // Map { bla: 'blaa', bla2: 'blaaa2' }</pre>
+
+<p>无论如何，和正确用法比较起来，几乎没有什么不同: </p>
+
+<pre class="syntaxbox brush js example-good">let myMap = new Map()
+myMap.set('bla','blaa')
+myMap.set('bla2','blaa2')
+console.log(myMap)  // Map { 'bla' =&gt; 'blaa', 'bla2' =&gt; 'blaa2' }
+
+myMap.has('bla')    // true
+myMap.delete('bla') // true
+console.log(myMap)  // Map { 'bla2' =&gt; 'blaa2' }</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map-objects', 'Map')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{Compat("javascript.builtins.Map")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Set")}}</li>
+ <li>{{jsxref("WeakMap")}}</li>
+ <li>{{jsxref("WeakSet")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html
new file mode 100644
index 0000000000..59c1b50654
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html
@@ -0,0 +1,80 @@
+---
+title: Map.prototype.keys()
+slug: Web/JavaScript/Reference/Global_Objects/Map/keys
+tags:
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/keys
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/keys
+browser-compat: javascript.builtins.Map.keys
+---
+<div>{{JSRef}}</div>
+
+<p><code><strong>keys()</strong></code> 返回一个引用的 <code><strong>Iterator</strong></code> 对象。它包含按照顺序插入 <code>Map</code> 对象中每个元素的key值。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-keys.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate"><code><em>myMap</em>.keys()</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个存在引用关系的 {{jsxref("Map")}} iterator 对象.</p>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="使用_keys">使用 <code>keys()</code></h3>
+
+<pre class="brush:js notranslate">var myMap = new Map();
+myMap.set("0", "foo");
+myMap.set(1, "bar");
+myMap.set({}, "baz");
+
+var mapIter = myMap.keys();
+
+console.log(mapIter.next().value); // "0"
+console.log(mapIter.next().value); // 1
+console.log(mapIter.next().value); // Object
+</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('ES2015', '#sec-map.prototype.keys', 'Map.prototype.keys')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.keys', 'Map.prototype.keys')}}</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>
+
+
+
+<p>{{Compat("javascript.builtins.Map.keys")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Map.prototype.entries()")}}</li>
+ <li>{{jsxref("Map.prototype.values()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/map/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/map/index.html
new file mode 100644
index 0000000000..e0966fcec7
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/map/index.html
@@ -0,0 +1,65 @@
+---
+title: Map() 构造函数
+slug: Web/JavaScript/Reference/Global_Objects/Map/Map
+tags:
+  - Constructor
+  - JavaScript
+  - Map
+  - Reference
+  - Polyfill
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/Map
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/Map
+browser-compat: javascript.builtins.Map.Map
+---
+<div>{{JSRef}}</div>
+
+<p><strong><code>Map()</code> 构造函数</strong> 创建 {{jsxref("Map")}} 对象.</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">new Map([<var>iterable</var>])</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code><var>iterable</var></code></dt>
+ <dd>Iterable 可以是一个{{jsxref("Array", "数组")}}或者其他 <a href="/zh-CN/docs/Web/JavaScript/Guide/iterable">iterable</a> 对象，其元素为键值对(两个元素的数组，例如: [[ 1, 'one' ],[ 2, 'two' ]])。 每个键值对都会添加到新的 Map。<code>null</code> 会被当做 <code>undefined。</code></dd>
+</dl>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js">let myMap = new Map([
+  [1, 'one'],
+  [2, 'two'],
+  [3, 'three'],
+])
+</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map-constructor', 'Map constructor')}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Map.Map")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{jsxref("Set")}}</li>
+ <li>{{jsxref("WeakMap")}}</li>
+ <li>{{jsxref("WeakSet")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/set/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/set/index.html
new file mode 100644
index 0000000000..d4fd287926
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/set/index.html
@@ -0,0 +1,98 @@
+---
+title: Map.prototype.set()
+slug: Web/JavaScript/Reference/Global_Objects/Map/set
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+  - Reference
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/set
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/set
+browser-compat: javascript.builtins.Map.set
+---
+<p id="sect1">{{JSRef}}</p>
+
+<p><code><strong>set()</strong></code> 方法为 <code>Map</code> 对象添加或更新一个指定了键（<code>key</code>）和值（<code>value</code>）的（新）键值对。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/map-prototype-set.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>.set(key, value);</code></pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>key</dt>
+ <dd>要添加至相应 <code>Map</code> 对象的元素的键。</dd>
+ <dt>value</dt>
+ <dd>要添加至相应 <code>Map</code> 对象的元素的值。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p><code>Map</code> 对象</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="使用_set_方法">使用 <code>set</code> 方法</h3>
+
+<pre class="brush: js">var myMap = new Map();
+
+// 将一个新元素添加到 Map 对象
+myMap.set("bar", "foo");
+myMap.set(1, "foobar");
+
+// 在Map对象中更新某个元素的值
+myMap.set("bar", "baz");
+</pre>
+
+<h3 id="链式使用_set_方法">链式使用 <code>set</code> 方法</h3>
+
+<p>因为 Set() 方法返回 Map 对象本身，所以你可以像下面这样链式调用它:</p>
+
+<pre class="brush: js">// Add new elements to the map with chaining.
+myMap.set('bar', 'foo')
+     .set(1, 'foobar')
+     .set(2, 'baz');
+</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('ES2015', '#sec-map.prototype.set', 'Map.prototype.set')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.set', 'Map.prototype.set')}}</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>
+
+
+
+<p>{{Compat("javascript.builtins.Map.set")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+ <li>{{jsxref("Map.prototype.get()")}}</li>
+ <li>{{jsxref("Map.prototype.has()")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/size/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/size/index.html
new file mode 100644
index 0000000000..97a5d475c3
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/size/index.html
@@ -0,0 +1,79 @@
+---
+title: Map.prototype.size
+slug: Web/JavaScript/Reference/Global_Objects/Map/size
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Map
+  - Property
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/size
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/size
+browser-compat: javascript.builtins.Map.size
+---
+<div>{{JSRef}}<br>
+ </div>
+
+<p><code><strong>size</strong></code> 是可访问属性，用于返回 一个{{jsxref("Map")}} 对象的成员数量。</p>
+
+<p>{{EmbedInteractiveExample("pages/js/map-prototype-size.html")}}</p>
+
+<p>这个示例源码保存在GitHub：<a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a>。如果你想贡献代码，修改后在GitHub上发推送请求给我们。</p>
+
+<p> </p>
+
+<h2 id="描述">描述</h2>
+
+<p>size 属性的值是一个整数，表示 Map 对象有多少个键值对。size 是只读属性，用set 方法修改size返回 undefined，即不能改变它的值。</p>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush:js">var myMap = new Map();
+myMap.set("a", "alpha");
+myMap.set("b", "beta");
+myMap.set("g", "gamma");
+
+myMap.size // 3
+</pre>
+
+<h2 id="规范">规范</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('ES6', '#sec-get-map.prototype.size', 'Map.prototype.size')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-get-map.prototype.size', 'Map.prototype.size')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+<p>此页的兼容性表格请查阅：<a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> <br>
+ 如果你想更新数据，请在GitHub上给我们发推送请求。</p>
+
+<div class="blockIndicator warning">
+<p><strong>异常提醒</strong></p>
+</div>
+
+<ul>
+ <li>在JavaScript中直接书写Map.prototype.size可能得到以下异常：<br>
+  <code>Uncaught TypeError: Method get Map.prototype.size called on incompatible receiver #&lt;Map&gt;</code><br>
+  异常原因查看：<a href="/zh-CN/docs/">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Called_on_incompatible_type</a></li>
+</ul>
+
+<h2 id="相关阅读">相关阅读</h2>
+
+<ul>
+ <li>{{jsxref("Map")}}</li>
+</ul>
diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/values/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/values/index.html
new file mode 100644
index 0000000000..5c4aad2316
--- /dev/null
+++ b/files/zh-cn/web/javascript/reference/global_objects/map/values/index.html
@@ -0,0 +1,121 @@
+---
+title: Map.prototype.values()
+slug: Web/JavaScript/Reference/Global_Objects/Map/values
+tags:
+  - ECMAScript 2015
+  - Iterator
+  - JavaScript
+  - Map
+  - Method
+  - Prototype
+translation_of: Web/JavaScript/Reference/Global_Objects/Map/values
+original_slug: Web/JavaScript/Reference/Global_Objects/Map/values
+browser-compat: javascript.builtins.Map.values
+---
+<div><code><strong>values()</strong></code> 方法返回一个新的Iterator对象。它包含按顺序插入Map对象中每个元素的value值。</div>
+
+<div> </div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><code><em>myMap</em>.values()</code></pre>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个新的 <a href="https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Map" title="此页面仍未被本地化, 期待您的翻译!"><code>Map</code></a> 可迭代对象.</p>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="使用_values()"><code>使用 values()</code></h3>
+
+<pre class="brush:js">var myMap = new Map();
+myMap.set("0", "foo");
+myMap.set(1, "bar");
+myMap.set({}, "baz");
+
+var mapIter = myMap.values();
+
+console.log(mapIter.next().value); // "foo"
+console.log(mapIter.next().value); // "bar"
+console.log(mapIter.next().value); // "baz"</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-map.prototype.values', 'Map.prototype.values')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>初始定义</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-map.prototype.values', 'Map.prototype.values')}}</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>
+
+<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>38</td>
+   <td>{{ CompatGeckoDesktop("20") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>25</td>
+   <td>7.1</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>{{CompatNo}}</td>
+   <td>38</td>
+   <td>{{ CompatGeckoMobile("20") }}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>8</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="查看">查看</h2>
+
+<ul>
+ <li>{{jsxref("Map.prototype.entries()")}}</li>
+ <li>{{jsxref("Map.prototype.keys()")}}</li>
+</ul>