<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.div1{
display: block;
}
</style>
</head>
<body>
<div style="display: none;">
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
</ul>
</div>
<script>
document.oncontextmenu = function(e){
e.preventDefault();
let div1 = document.querySelector('div');
div1.style.display = 'block';
}
</script>
</body>
</html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
window.onload = function(){
let div1 = document.querySelector('div');
div1.onclick = function(){
alert(div1.innerHTML)
}
window.onresize = function(){
div1.style.background = 'red';
}
}
</script>
</head>
<body>
<div>
我是div
</div>
</body>
</html>
