uTools-Manuals/docs/javascript/Reference/Global_Objects/String/raw.html

<article id="wikiArticle">
<div></div>
<h2 id="Summary" name="Summary">概述</h2>
<p><strong>String.raw()</strong> 是一个<a href="Reference/template_strings">模板字符串</a>的标签函数，它的作用类似于 Python 中的字符串前缀 <code>r</code> 和 C# 中的字符串前缀 <code>@</code>，是用来获取一个模板字符串的原始字面量值的。</p>
<h2 id="Syntax" name="Syntax">语法</h2>
<pre><code class="language-javascript"><code>String.raw(callSite, <em>...substitutions</em>)
String.raw`templateString`</code>
</code></pre>
<h3 id="Parameters" name="Parameters">参数</h3>
<dl>
<dt><code>callSite</code></dt>
<dd>一个模板字符串的“调用点对象”。类似<code>{ raw: ['foo', 'bar', 'baz'] }</code>。</dd>
<dt><code>...substitutions</code></dt>
<dd>任意个可选的参数，表示任意个内插表达式对应的值。</dd>
<dt><font face="consolas, Liberation Mono, courier, monospace"><span style="background-color: rgba(220, 220, 220, 0.5);">templateString</span></font></dt>
<dd>模板字符串。</dd>
</dl>
<h3 id="返回">返回</h3>
<p>给定模板字符串的原始字面量值。</p>
<h3 id="异常">异常</h3>
<dl>
<dt><code><a href="Reference/Global_Objects/TypeError" title="TypeError（类型错误） 对象用来表示值的类型非预期类型时发生的错误。"><code>TypeError</code></a></code></dt>
<dd>如果第一个参数没有传入一个格式良好的调用点对象，则会抛出 <code>TypeError</code> 异常。</dd>
</dl>
<h2 id="Description" name="Description">描述</h2>
<p>不要被上面复杂的参数要求吓到，因为像所有的标签函数一样，你通常不需要把它看成一个普通函数，你只需要把它放在模板字符串前面就可以了，而不是在它后面加个括号和一堆参数来调用它，引擎会替你去调用它。</p>
<p><code>String.raw()</code> 是唯一一个内置的模板字符串标签函数，因为它太常用了。不过它并没有什么特殊能力，你自己也可以实现一个和它功能一模一样的标签函数。</p>
<h2 id="Examples" name="Examples">示例</h2>
<pre><code  class="language-javascript">String.raw `Hi\n!`;                 
// "Hi\\n!"，这里得到的不是 Hi 后面跟个换行符，而是跟着 \ 和 n 两个字符

String.raw `Hi\u000A!`;             
// "Hi\\u000A!"，同上，这里得到的会是 \、u、0、0、0、A 6个字符，
// 任何类型的转义形式都会失效，保留原样输出，不信你试试.length

let name = "Bob";
String.raw `Hi\n${name}!`;             
// "Hi\\nBob!"，内插表达式还可以正常运行

String.raw({raw: "test"}, 0, 1, 2); 
// "t0e1s2t"，我认为你通常不需要把它当成普通函数来调用
</code></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><a class="external" href="https://www.ecma-international.org/ecma-262/6.0/#sec-string.raw" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">String.raw</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p></p><div class="bc-data"><a class="bc-github-link external" href="https://github.com/mdn/browser-compat-data" rel="noopener">Update compatibility data on GitHub</a><table class="bc-table bc-table-js"><thead><tr class="bc-platforms"><td></td><th class="bc-platform-desktop" colspan="6"><span>Desktop</span></th><th class="bc-platform-mobile" colspan="7"><span>Mobile</span></th><th class="bc-platform-server" colspan="1"><span>Server</span></th></tr><tr class="bc-browsers"><td></td><th class="bc-browser-chrome"><span class="bc-head-txt-label bc-head-icon-chrome">Chrome</span></th><th class="bc-browser-edge"><span class="bc-head-txt-label bc-head-icon-edge">Edge</span></th><th class="bc-browser-firefox"><span class="bc-head-txt-label bc-head-icon-firefox">Firefox</span></th><th class="bc-browser-ie"><span class="bc-head-txt-label bc-head-icon-ie">Internet Explorer</span></th><th class="bc-browser-opera"><span class="bc-head-txt-label bc-head-icon-opera">Opera</span></th><th class="bc-browser-safari"><span class="bc-head-txt-label bc-head-icon-safari">Safari</span></th><th class="bc-browser-webview_android"><span class="bc-head-txt-label bc-head-icon-webview_android">Android webview</span></th><th class="bc-browser-chrome_android"><span class="bc-head-txt-label bc-head-icon-chrome_android">Chrome for Android</span></th><th class="bc-browser-edge_mobile"><span class="bc-head-txt-label bc-head-icon-edge_mobile">Edge Mobile</span></th><th class="bc-browser-firefox_android"><span class="bc-head-txt-label bc-head-icon-firefox_android">Firefox for Android</span></th><th class="bc-browser-opera_android"><span class="bc-head-txt-label bc-head-icon-opera_android">Opera for Android</span></th><th class="bc-browser-safari_ios"><span class="bc-head-txt-label bc-head-icon-safari_ios">Safari on iOS</span></th><th class="bc-browser-samsunginternet_android"><span class="bc-head-txt-label bc-head-icon-samsunginternet_android">Samsung Internet</span></th><th class="bc-browser-nodejs"><span class="bc-head-txt-label bc-head-icon-nodejs">Node.js</span></th></tr></thead><tbody><tr><th scope="row"><code>raw</code></th><td class="bc-supports-yes bc-browser-chrome"><span class="bc-browser-name">Chrome</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              41</td><td class="bc-supports-yes bc-browser-edge"><span class="bc-browser-name">Edge</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              12</td><td class="bc-supports-yes bc-browser-firefox"><span class="bc-browser-name">Firefox</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              34</td><td class="bc-supports-no bc-browser-ie"><span class="bc-browser-name">IE</span><abbr class="bc-level-no only-icon" title="No support">
<span>No support</span>
</abbr>
              No</td><td class="bc-supports-no bc-browser-opera"><span class="bc-browser-name">Opera</span><abbr class="bc-level-no only-icon" title="No support">
<span>No support</span>
</abbr>
              No</td><td class="bc-supports-yes bc-browser-safari"><span class="bc-browser-name">Safari</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              10</td><td class="bc-supports-no bc-browser-webview_android"><span class="bc-browser-name">WebView Android</span><abbr class="bc-level-no only-icon" title="No support">
<span>No support</span>
</abbr>
              No</td><td class="bc-supports-yes bc-browser-chrome_android"><span class="bc-browser-name">Chrome Android</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              41</td><td class="bc-supports-yes bc-browser-edge_mobile"><span class="bc-browser-name">Edge Mobile</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              Yes</td><td class="bc-supports-yes bc-browser-firefox_android"><span class="bc-browser-name">Firefox Android</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              34</td><td class="bc-supports-no bc-browser-opera_android"><span class="bc-browser-name">Opera Android</span><abbr class="bc-level-no only-icon" title="No support">
<span>No support</span>
</abbr>
              No</td><td class="bc-supports-yes bc-browser-safari_ios"><span class="bc-browser-name">Safari iOS</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              10</td><td class="bc-supports-yes bc-browser-samsunginternet_android"><span class="bc-browser-name">Samsung Internet Android</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              4.0</td><td class="bc-supports-yes bc-browser-nodejs"><span class="bc-browser-name">nodejs</span><abbr class="bc-level-yes only-icon" title="Full support">
<span>Full support</span>
</abbr>
              4.0.0</td></tr></tbody></table><section class="bc-legend" id="sect1"><h3 class="offscreen" id="Legend">Legend</h3><dl><dt><span class="bc-supports-yes bc-supports">
<abbr class="bc-level bc-level-yes only-icon" title="Full support">
<span>Full support</span>
                  
                </abbr></span></dt><dd>Full support</dd><dt><span class="bc-supports-no bc-supports">
<abbr class="bc-level bc-level-no only-icon" title="No support">
<span>No support</span>
                  
                </abbr></span></dt><dd>No support</dd></dl></section></div><p></p>
<div id="compat-desktop"> </div>
<h2 id="See_also" name="See_also">相关链接</h2>
<ul>
<li><a href="Reference/template_strings">模板字符串</a></li>
<li><a href="Reference/String" title="此页面仍未被本地化, 期待您的翻译!"><code>String</code></a></li>
<li><a href="Reference/Lexical_grammar">JavaScript 词法</a></li>
</ul>
</article>