如何动态加载 JavaScript 文件?
javascriptweb developmentobject oriented programming更新于 2025/8/26 23:40:17
以下是动态加载 JavaScript 文件的代码 −
示例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 20px;
font-weight: 500;
}
</style>
</head>
<body>
<h1>Load a JavaScript file Dynamically</h1>
<div style="color: green;" class="result"></div>
<button class="btn">点击此处</button>
<h3>
Click the above button to load external JavaScript
</h3>
<script>
let resEle = document.querySelector(".result");
document.querySelector(".Btn").addEventListener("click", () => {
var jsRef = document.createElement("script");
jsRef.setAttribute("src", "sample.js");
document.getElementsByTagName("head")[0].appendChild(jsRef);
});
</script>
</body>
</html>
script.js
resEle.innerHTML='JavaScript has been loaded';
输出
上述代码将产生以下输出 −
点击‘CLICK HERE’按钮 −
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有用资源
javascript 参考教程 - 该教程包含有关 javascript 的更多信息:https://www.cainiaomax.com/javascript/
