这篇文章主要介绍了JavaScript怎么实现复选框全选功能，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
具体内容如下
代码：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> table { width: 300px; border-spacing: 0; margin: 100px auto; border-collapse: collapse; } table tr:nth-child(n+2)>td { text-align: left; background-color: rgb(250, 245, 245); color: dimgray; font-size: 14px; } table tr:nth-child(1) { background-color: skyblue; color: white; } th, td { padding: 10px; border: 0.5px solid gray; } </style></head><body> <table> <tr> <th><input type="checkbox" name="" id="all"></th> <th>商品</th> <th>价格</th> </tr> <tr> <td><input type="checkbox" name="" id="ip8"></td> <td>iPhone8</td> <td>8000</td> </tr> <tr> <td><input type="checkbox" name="" id="pro"></td> <td>iPad Pro</td> <td>5000</td> </tr> <tr> <td><input type="checkbox" name="" id="air"></td> <td>iPad Air</td> <td>2000</td> </tr> <tr> <td><input type="checkbox" name="" id="watch"></td> <td>Apple Watch</td> <td>2000</td> </tr> </table> <script> var all = document.getElementById('all'); var items = document.querySelectorAll('tr>td>input'); all.onclick = function() { for (var i = 0; i < items.length; i++) { items[i].checked = this.checked; } } for (var i = 0; i < items.length; i++) { items[i].onclick = function() { var flag_all = 1; for (var j = 0; j < items.length; j++) { if (items[j].checked == 0) { flag_all = 0; all.checked = flag_all; break; } } all.checked = flag_all; } } </script></body></html>感谢你能够认真阅读完这篇文章，希望小编分享的“JavaScript怎么实现复选框全选功能”这篇文章对大家有帮助，同时也希望大家多多支持编程网，关注编程网行业资讯频道，更多相关知识等着你来学习!
