How to efficiently remove specific conditional expressions in script tags in HTML strings?

Efficiently modify HTML strings: accurate removal<script>标签内特定条件表达式</script>

本文介绍如何高效地修改HTML字符串，目标是移除<script></script>标签内特定条件表达式的一部分，避免影响其他内容。 我们将处理以下HTML片段：

<meta charset="utf-8"><meta content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" name="viewport"><meta content="ie=edge" http-equiv="X-UA-Compatible"><link href="//test.baidu.com/533fb44/umi.10d72219.css" rel="stylesheet">window.publicPath = window.__INJECTED_PUBLIC_PATH_BY_QIANKUN__ || "//test.baidu.com/533fb44/";<div id="root"></div>

目标是将以下部分：

window.publicPath = window.__INJECTED_PUBLIC_PATH_BY_QIANKUN__ || "//test.baidu.com/533fb44/";

替换为：

window.publicPath = "//test.baidu.com/533fb44/";

解决方案：利用JavaScript的replace()方法

直接使用字符串的replace()方法即可高效地解决此问题。 代码如下：

let str = '<meta charset="utf-8"><meta content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" name="viewport"><meta content="ie=edge" http-equiv="X-UA-Compatible"><link href="//test.baidu.com/533fb44/umi.10d72219.css" rel="stylesheet">window.publicPath = window.__INJECTED_PUBLIC_PATH_BY_QIANKUN__ || "//test.baidu.com/533fb44/";<div id="root"></div>';
let newStr = str.replace('window.__INJECTED_PUBLIC_PATH_BY_QIANKUN__ || ', '');
console.log(newStr);

这段代码将目标字符串window.__INJECTED_PUBLIC_PATH_BY_QIANKUN__ ||替换为空字符串，从而达到去除条件表达式的目的。 需要注意的是，此方法依赖于目标字符串的固定格式。如果格式发生变化，则需要相应调整替换字符串。 对于更复杂的场景，正则表达式可能更灵活。

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