标签:sub length mamicode llb 实现 info load button meta
Javascript
1、全选、全不选、反选的js实现:
<!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> <button>全选</button> <button>全不选</button> <button>反选</button> <input type="checkbox">吃 <input type="checkbox">喝 <input type="checkbox">玩 <input type="checkbox"> 乐 <script type="text/javascript"> //获取三个button var btns = document.querySelectorAll(‘button‘); //获取所有复选框内容 var inputs = document.querySelectorAll(‘input‘); btns[0].onclick = function () { //循环获取到所有的复选框的input for (var i = 0; i < inputs.length; i++) { inputs[i].checked = true; } }; btns[1].onclick = function () { // for (var i = 0; i < inputs.length; i++) { inputs[i].checked = false; } }; btns[2].onclick = function () { for (var i = 0; i < inputs.length; i++) { inputs[i].checked == true ? inputs[i].checked = false : inputs[i].checked = true; } }; </script> </body> </html>
效果图:
2、全选、全不选、反选的jquery实现:
<!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> <form> 你爱好的运动是:<input type="checkbox" id="checkAllbox" />全选/全不选 <br /> <input type="checkbox" name="items" value="足球" />足球 <input type="checkbox" name="items" value="篮球" />篮球 <input type="checkbox" name="items" value="乒乓球" />乒乓球 <input type="checkbox" name="items" value="羽毛球" />羽毛球 <br /> <input type="button" id="checkAll" value="全选" /> <input type="button" id="checkNo" value="全不选" /> <input type="button" id="checkRev" value="反选" /> <input type="button" id="submit" value="提交" /> </form> <script src="jquery-3.4.1.min.js"></script> <script type="text/javascript"> var $items = $(‘:checkbox[name=items]‘); var $checkAllbox = $(‘#checkAllbox‘); $(‘#checkAll‘).click(function () { //元素固有属性有prop,自定义属性用attr $items.prop(‘checked‘, true); $checkAllbox.prop(‘checked‘, true); }) $(‘#checkNo‘).click(function () { //元素固有属性有prop,自定义属性用attr $items.prop(‘checked‘, false); $checkAllbox.prop(‘checked‘, false); }) $(‘#checkRev‘).click(function () { //遍历 $items.each(function () { this.checked = !this.checked; }) $checkAllbox.prop(‘checked‘, $items.filter(‘:checked‘).length == $items.length) $checkAllbox.prop(‘checked‘, $items.filter(‘:not(:checked)‘).length == 0) }) $checkAllbox.click(function () { $items.prop(‘checked‘, this.checked) }) $items.click(function () { $checkAllbox.prop(‘checked‘, $items.filter(‘:checked‘).length == $items.length) }) </script> </body> </html>
标签:sub length mamicode llb 实现 info load button meta
原文地址:https://www.cnblogs.com/zhaojianhui/p/13657753.html