<html>
<head>
<title>按钮点击事件示例</title>
<script>
function a(callback) {
console.log("执行函数a！");
console.log("调用回调函数");
callback(); // 调用回调函数
}
function b(){ console.log("回调函数b"); }
function c() { console.log("回调函数c"); }
function execute(){ a(b); a(c); }
<!-- execute(); -->
</script>
</head>
<body>
<button onclick = "execute()">回调函数</button>
</body>
<html>
标签：function,console,log,js,callback,回调,函数 From： https://www.cnblogs.com/xbding/p/18101444