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JavaScript
iframe緩存jquery
iframe緩存jquery
JavaScript
錢淋西
2年前
9瀏覽
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是HTML中的一個(gè)重要元素，可以為網(wǎng)頁提供一個(gè)獨(dú)立的窗口，其中可以加載其他網(wǎng)頁或嵌入其他類型的媒體。而jQuery是一種流行的JavaScript庫，它為JavaScript提供了許多簡(jiǎn)化代碼的語法和方法。本文將探討如何在<iframe>中緩存jQuery框架的問題。<p>當(dāng)我們?cè)谑褂?iframe>加載其他網(wǎng)頁時(shí)，如果這個(gè)網(wǎng)頁中使用了jQuery框架，那么默認(rèn)情況下每次加載網(wǎng)頁時(shí)，瀏覽器都會(huì)重新下載和解析jQuery文件，這無疑會(huì)影響頁面的加載速度和用戶體驗(yàn)。</p><p>為了解決這個(gè)問題，我們可以將jQuery文件緩存到本地，并在<iframe>中引用本地緩存文件，這樣就可以避免重復(fù)加載和解析jQuery文件。</p><pre><!-- 引入jQuery文件 --> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <!-- 緩存jQuery文件到本地 --> <script> if (!localStorage.getItem('jquery')) { $.get('https://code.jquery.com/jquery-3.6.0.min.js', function(data){ localStorage.setItem('jquery', data); }); } </script></pre><p>上面的代碼中，我們先引入了jQuery文件，然后在<script>標(biāo)簽中寫了一個(gè)JavaScript代碼塊，它會(huì)檢查本地是否已經(jīng)存在緩存的jQuery文件，如果不存在，則對(duì)jQuery進(jìn)行g(shù)et請(qǐng)求，并將返回的數(shù)據(jù)緩存在localStorage中。</p><p>接下來，在<iframe>中引用緩存的jQuery文件：</p><pre><!-- 引用緩存的jQuery文件 --> <iframe src="your-src" onload=" var iframe = this.contentWindow; iframe.$ = iframe.jQuery = localStorage.getItem('jquery'); "></iframe></pre><p>上面的代碼中，我們?cè)?lt;iframe>標(biāo)簽中使用了onload事件來監(jiān)聽當(dāng)<iframe>加載完成后，將其窗口對(duì)象的jQuery對(duì)象和$對(duì)象設(shè)置為本地緩存的jQuery文件。</p><p>有了這些操作，每次加載包含<iframe>的頁面時(shí)，瀏覽器就不再需要重新下載和解析jQuery文件，從而提高頁面加載速度，改善用戶體驗(yàn)。</p></div><div id="vfznft7" class="share"></div><div id="75dlrt5" class="Prev_Next"><div id="zlphxll" class="box">上一篇<a href="http://www.lofty888.cn/post/904293.html">快速定位css</a></div><div id="lj7fj57" class="box">下一篇<a href="http://www.lofty888.cn/post/904302.html">mysql中保存大數(shù)據(jù)用什么</a></div></div></div><div id="vrhv7dp" class="related related-list"><h5>相關(guān)文章</h5><ul><li><a href="http://www.lofty888.cn/post/1620588.html">javascript倒計(jì)時(shí)做法</a><span>10-19</span></li><li><a href="http://www.lofty888.cn/post/1620587.html">javascript值得學(xué)么</a><span>10-19</span></li><li><a 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