全选 #178
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<input type="checkbox" id="all" /> 全选
<br />
<input type="checkbox" class="item" /> 选项1
<input type="checkbox" class="item" /> 选项2
<input type="checkbox" class="item" /> 选项3
<script>
const all = document.querySelector("#all");
const items = document.querySelectorAll(".item");
all.addEventListener("click", function () {
for (let i = 0; i < items.length; i++) {
items[i].checked = all.checked;
}
});
</script>
</body>
</html> |
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