The jquery method to achieve inversion: 1. Import the jQuery library; 2. Set the click event; 3. Loop to set the selected status of other multi-select boxes; 4. Implement the inversion of the identification variable through the "!chkall;" method That’s it.
The operating environment of this article: windows7 system, jquery-2.1.4 version, Dell G3 computer.
How to implement the inversion method in jquery?
Several methods of using JQuery to achieve all selection and inverse selection
As shown in the figure: the effect to be achieved is to click the Select All box to select all, and then click to unselect all
Method 1: 1. Import the jQuery library, which can be downloaded online and is free and open source. 2. Set the class to fruit and set their properties through prop.
Method 1: jQuery code:
//定义标识,true表示选中 var chkall = true; $(function () { //全选按钮设置点击事件 $("#btnAll").click(function () { //1、循环设置其它多选框选中状态,跟标识用的变量一样 $(".fruit").prop("checked", chkall); //2、标识的变量取反 chkall = !chkall; }) })
Method 2 idea: Get all the radio button boxes through the form filter, and then set the checked attribute in a loop.
Method 2: jQuery code:
$(function () { //得到全选框的值 var $checked = this.checked; //通过表单过滤器得到所有单选框 $("input[class=fruit]").each(function () { //单选框的值与全选框的值保持一致 this.checked = $checked; }) }) })
Final additional explanation: In JQuery, we generally use Attr to obtain attributes, and we use prop to set the value of attributes.
Recommended learning: " jquery video tutorial》
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