代码示例:(标识:eg_js_debugger)
<!DOCTYPE html>
<html>
<head>
</head>

<body>

<p id="demo"></p>

<p>打开调试器后,下面的代码应该在执行第三行之前停止执行。</p>

<script>
var x = 15 * 5;
debugger;
document.getElementById("demo").innerHTML = x;
</script>

</body>
</html>
运行结果: