可以通过debugger来检测是否打开了f12开发者工具，然后进行隐藏，完整代码如下：
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<div id="cont">我是内容</div>
<script>
function consoleOpenCallback() {
document.getElementById("cont").style.display="none";
alert("您打开了f12");
}
!function () {
const handler = setInterval(() => {
const before = new Date();
debugger;
const after = new Date();
const cost = after.getTime() - before.getTime();
if (cost > 100) {
consoleOpenCallback();
clearInterval(handler)
}
}, 1000)
}();
</script>
</body>
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