演示代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title></title>
<script type="text/javascript">
window.onload = function(){
var abc = document.getElementById("wyzx");
abc.style.color = "#ff0000";
// 以下错误,上面代码执行;后面代码都不执行,阻塞了
abbc.style.fontSize = "50px";
// 如果前面有错误,以下弹窗不会弹出来
alert(111);
abc.style.fontWeight = "700";
abc.style.textAlign = "center";
}
</script>
</head>
<body>
<!--
查错:
1,通过f12控制台
2,alert阻塞调试错误
-->
<div id="wyzx">我要自学</div>
</body>
</html>