files/zh-cn/web/http/headers/content-security-policy/script-src-elem/index.html


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---
title: 'CSP: script-src-elem'
slug: Web/HTTP/Headers/Content-Security-Policy/script-src-elem
translation_of: Web/HTTP/Headers/Content-Security-Policy/script-src-elem
---
<div>{{HTTPSidebar}}</div>

<p>HTTP协议中 {{HTTPHeader("Content-Security-Policy")}} (CSP) <code><strong>script-src-elem</strong></code> 指示符明指定了合法的js要素来源 {{HTMLElement("script")}} ，但是不包括类似onclick这样的事件处理器中包含的内联脚本。</p>

<table class="properties">
 <tbody>
  <tr>
   <th scope="row">CSP 版本</th>
   <td>3</td>
  </tr>
  <tr>
   <th scope="row">Directive type</th>
   <td>{{Glossary("Fetch directive")}}</td>
  </tr>
  <tr>
   <th scope="row">{{CSP("default-src")}} fallback</th>
   <td>Yes. If this directive is absent, the user agent will look for the {{CSP("script-src")}} directive, and if both of them are absent, fallback to <code>default-src</code> directive.</td>
  </tr>
 </tbody>
</table>

<h2 id="语法">语法</h2>

<p> <code>script-src-elem</code> 可以允许多个来源：</p>

<pre class="syntaxbox notranslate">Content-Security-Policy: script-src-elem &lt;source&gt;;
Content-Security-Policy: script-src-elem &lt;source&gt; &lt;source&gt;;
</pre>

<p><code>script-src-elem</code> 可以跟 {{CSP("script-src")}}一起用：</p>

<pre class="syntaxbox notranslate">Content-Security-Policy: script-src &lt;source&gt;;
Content-Security-Policy: script-src-elem &lt;source&gt;;
</pre>

<h3 id="Sources">Sources</h3>

<p>{{page("Web/HTTP/Headers/Content-Security-Policy/default-src", "Sources")}}</p>

<h2 id="范例">范例</h2>

<h3 id="回退到_script-src">回退到 script-src</h3>

<p>如果没有 <code>script-src-elem</code> 存在, 客户端会回退到 {{CSP("script-src")}} 指示符, 如果那个也还是没有那就回退到 {{CSP("default-src")}}。</p>

<div class="hidden">
<p>TODO: Add comprehensive examples.</p>
</div>

<h2 id="细则">细则</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{specName("CSP 3.0", "#directive-script-src-elem", "script-src-elem")}}</td>
   <td>{{Spec2("CSP 3.0")}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容问题">浏览器兼容问题</h2>

<p>{{Compat("http.headers.csp.Content-Security-Policy.script-src-elem")}}</p>

<h2 id="其他的链接">其他的链接</h2>

<ul>
 <li>{{HTTPHeader("Content-Security-Policy")}}</li>
 <li>{{HTMLElement("script")}}</li>
 <li>{{CSP("script-src")}}</li>
 <li>{{CSP("script-src-attr")}}</li>
</ul>