<div id = 'data-test' data-my-age = 23></div>
<script>
let age = document.getElementById("data-test")
alert(age.dataset.myAge)
</script>
<div id = 'data-test' data-my-age = 23></div>
<script>
let age = document.getElementById("data-test")
alert(age.dataset.myAge)
</script>
本文标题:js dataset的用法
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