I used to think that I could only use jquery's data() to get it
Haha, I'm too weak
<!DOCTYPE html>
<html>
<head>
<title>dataset</title>
<meta charset="utf-8">
</head>
<body>
<p id='p' data-index='demo'>
</p>
</body>
<script type="text/javascript">var a = document.getElementById('p');
console.log(a)
console.log(a.dataset.index)//demo</script>
</html>You can directly use dataset to get the data attribute of the DOM element
Okay, you can also use the js method of getting attributes, getAttribute()
a.getAttribute('data-index')==>"demo"
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