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author | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
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committer | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
commit | 310fd066e91f454b990372ffa30e803cc8120975 (patch) | |
tree | d5d900deb656a5da18e0b60d00f0db73f3a2e88e /files/zh-cn/web/javascript/reference/global_objects/string/trimleft/index.html | |
parent | 8260a606c143e6b55a467edf017a56bdcd6cba7e (diff) | |
download | translated-content-310fd066e91f454b990372ffa30e803cc8120975.tar.gz translated-content-310fd066e91f454b990372ffa30e803cc8120975.tar.bz2 translated-content-310fd066e91f454b990372ffa30e803cc8120975.zip |
unslug zh-cn: move
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diff --git a/files/zh-cn/web/javascript/reference/global_objects/string/trimleft/index.html b/files/zh-cn/web/javascript/reference/global_objects/string/trimleft/index.html deleted file mode 100644 index bc6133cecb..0000000000 --- a/files/zh-cn/web/javascript/reference/global_objects/string/trimleft/index.html +++ /dev/null @@ -1,122 +0,0 @@ ---- -title: String.prototype.trimStart() -slug: Web/JavaScript/Reference/Global_Objects/String/TrimLeft -tags: - - JavaScript - - Method - - Prototype - - String - - 参考 - - 字符串 - - 方法 -translation_of: Web/JavaScript/Reference/Global_Objects/String/trimStart ---- -<div>{{JSRef}}</div> - -<div><strong><code>trimStart()</code> </strong>方法从字符串的开头删除空格。<code>trimLeft()</code> 是此方法的别名。</div> - -<div>{{EmbedInteractiveExample("pages/js/string-trimstart.html")}}</div> - - - -<h2 id="语法">语法</h2> - -<pre class="syntaxbox"><var>str</var>.trimStart(); -<var>str</var>.trimLeft();</pre> - -<h3 id="返回值">返回值</h3> - -<p>一个新字符串,表示从其开头(左端)除去空格的调用字符串。</p> - -<h2 id="描述">描述</h2> - -<p><code>trimStart()</code> / <code>trimLeft()</code> 方法移除原字符串左端的连续空白符并返回一个新字符串,并不会直接修改原字符串本身。</p> - -<h3 id="别名">别名</h3> - -<p>为了与 {{jsxref("String.prototype.padStart")}} 等函数保持一致,标准方法名称为<code>trimStart</code>。 但是,出于 Web 兼容性原因,<code>trimLeft</code> 仍然是 <code>trimStart</code> 的别名。在某些引擎中,这意味着:</p> - -<pre class="brush: js">String.prototype.trimLeft.name === "trimStart";</pre> - -<h2 id="示例">示例</h2> - -<h3 id="使用_trimStart">使用 <code>trimStart()</code></h3> - -<p>下面的例子输出了小写的字符串 <code>"foo "</code>:</p> - -<pre class="brush:js;highlight:[5]">var str = " foo "; - -console.log(str.length); // 8 - -str = str.trimStart() // 等同于 str = str.trimLeft(); -console.log(str.length); // 5 -console.log(str); // "foo " -</pre> - -<h2 id="规范">规范</h2> - -<table> - <thead> - <tr> - <th scope="col">规范</th> - <th scope="col">状态</th> - <th scope="col">备注</th> - </tr> - </thead> - <tbody> - <tr> - <td><code><a href="https://github.com/tc39/proposal-string-left-right-trim/#stringprototypetrimstart--stringprototypetrimend">String.prototype.{trimStart,trimEnd}</a></code>proposal</td> - <td>Stage 4</td> - <td>Expected to be part of ES2019</td> - </tr> - </tbody> -</table> - -<h2 id="浏览器兼容性">浏览器兼容性</h2> - -<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p> - -<p>{{Compat("javascript.builtins.String.trimStart")}}</p> - -<h2 id="Polyfill">Polyfill</h2> - -<pre class="brush: js">// https://github.com/FabioVergani/js-Polyfill_String-trimStart - -(function(w){ - var String=w.String, Proto=String.prototype; - - (function(o,p){ - if(p in o?o[p]?false:true:true){ - var r=/^\s+/; - o[p]=o.trimLeft||function(){ - return this.replace(r,'') - } - } - })(Proto,'trimStart'); - -})(window); - - -/* -ES6: -(w=>{ - const String=w.String, Proto=String.prototype; - - ((o,p)=>{ - if(p in o?o[p]?false:true:true){ - const r=/^\s+/; - o[p]=o.trimLeft||function(){ - return this.replace(r,'') - } - } - })(Proto,'trimStart'); - -})(window); -*/</pre> - -<h2 id="参见">参见</h2> - -<ul> - <li>{{jsxref("String.prototype.trim()")}}</li> - <li>{{jsxref("String.prototype.trimEnd()")}}</li> -</ul> |