代码
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>全选反选</title>
</head>
<body><input type="checkbox" id="all">全选<ul><li><input type="checkbox" class="all_check">看书</li><li><input type="checkbox" class="all_check">打篮球</li><li><input type="checkbox" class="all_check">唱</li><li><input type="checkbox" class="all_check">跳</li><li><input type="checkbox" class="all_check">rap</li></ul><script>let all = document.querySelector('#all')let all1 = document.querySelectorAll('ul>li>input')all.onclick=function(){if(all.checked == true){for (i of all1){i.checked = true}}else{for(i of all1){i.checked = false}}}</script>
</body>
</html>结果
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