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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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The text was updated successfully, but these errors were encountered: