Introduction to layui event monitoring

1. Form event monitoring

1. lay-filter event filter

is equivalent to the selector, layui Exclusive selector

2, lay-verify verification attribute

The attribute value can be: required, phone number, email address, url, number, date, identity ID card. This is equivalent to a regular judgment. Of course, you can also define your own regular rules and make some complex judgments, for example:

    <input type="text" lay-verify="required">
    //这里写required就是必填项的意思，相反phone就是手机号，
    如果是多个判断可以这样：ay-verify="required|phone",手机号必填。

What if I want a complicated judgment? We need to reference the form module first

    layui.use('form',function()
    {
        var form = layui.form;
        //自定义一个验证器
        form.verify({
            account:[
            '正则'
            ,'提示语句'
            ]
            ，pass:[
            '正则'
            ,'提示语句'
            ]
            
        });
        
    })

When we finish writing the verification rules, we only need to write the name we defined, such as the account above into lay-verify="account", then for This rule verification is complete.

3. Lay-submit Binds the element that triggers submission

In the submit button label of the input, add such an attribute, then the verification effect of the layui form will come out.

4. form.on event

form.on('event(lay-filter)',function(){
    
})

Among them, event can be radio, checkbox, submit and other elements, and the lay-filter is the event filter attribute value we added, such as:

<input type="submit" lay-filter="go" lay-submit value="提交"/>

Yes, it is the value in this lay-filter=" ". Now we only need these two attributes to execute our corresponding events.

2. Form event monitoring

Before we start the introduction, we can get some ideas from this picture.

Okay, okay, let’s solve the problem! ! First create a table tag

<table id="demo" lay-filter="table"></table>

1. Header toolbar

This layui header toolbar is independent of the table and is attached to it, which means placing a box on top of the table , so it’s easy to understand!
The first step, so we first create a box, but this is a special box, we need to hide it

<div class="layui-hide layui-btn-group" id="toolbar">
    <button class="layui-btn " lay-event="getall">查看所选数据</button>
    <button class="layui-btn " lay-event="getnum">查看所选数量</button>
    <button class="layui-btn  layui-btn-danger" lay-event="delall">批量删除</button>
</div>

Thinking about the problem

There are three attributes that need to be paid attention to, layui -hide hidden attributes, layui-btn-group group button, lay-event event name.

How to identify our operations is to set different values ​​​​for layui-event to perform different behaviors.

The second step is to introduce our header box in the table module, and then listen to the event. Let’s take a look at our code!

    layui.use('table',function(){
       var table = layui.table;
       table.render({
           elem:'#demo'//表格ID
           ,url:'数据接口'
           ,toolbar:'#toolbar'//开启头部栏，写入我们的盒子id
           ,cols[[…………]]
       });
    });

At this point our table rendering is complete, let’s start the event!

    table.on('event(lay-filter)',function(obj){ 
    //这是格式，event有toolbar头部栏事件，tool行标签事件，edit编辑事件，等等，
    括号里的当然就是我们给表格设置的lay-filter属性啦！
    obj是这个表格里所有的数据，我们可以console.log(obj)来查看有哪些数据！！
    })

Now that the format is almost introduced, let’s start with the above typing

    table.on('toolbar(table)',function(obj){//我给表格设置的lay-filter叫table
        var checkStatus = table.checkStatus('demo')//表格id，获取选中行
        //嘿嘿，到了这，我好像说复选框怎么打了，很简单的，{type:'checkbox',fixed:'left'},写到cols里
        switch(obj.event)//对lay-event的值，进行不同的判断
        {
            case 'getall':
                 layer.msg(JSON.stringify(checkStatus.data));
                break;
            case 'getnum':
                layer.msg(JSON.stringify(checkStatus.data.length));
                break;
            case 'delall':
            //这是我自己打的一个批删，道理都差不多，遍历拿到id传到后台处理！
                var a = [];
                        for (var i = 0; i < checkStatus.data.length; i++) {
                            a.push(checkStatus.data[i].ProductID)
                        }
                        console.log(checkStatus)
                        let strid = a.toString();
                        let num = checkStatus.data.length;
                        if (num != 0) {
                            $.ajax({
                                url: &#39;/JD/ShopDelAll?strid=&#39; + strid
                                , type: &#39;Delete&#39;
                                , success: function (d) {
                                    layer.msg("删除了" + num + "条数据");
                                    location.href = &#39;/JD/ShopList&#39;;
                                }
                            })
                        }
                        else {
                            layer.msg("至少选择一个！")
                        }
                        break;
                break;
            
        }
        
    });

2. Table row toolbar

In fact, the principles are similar. It also attaches a box. In the table, it just exists in every row, so just write the code we added into the cols attribute! !
Create a box

<div class="layui-hide layui-btn-group" id="tool">
    <a class="layui-btn layui-btn-warm" lay-event="particulars">查看</a>
    <a class="layui-btn layui-btn-normal" lay-event="edit">修改</a>
    <a class="layui-btn layui-btn-danger" lay-event="delid">删除</a>
</div>

Event monitoring

This is simple. Did we use checkStats to get the selected status earlier? Yes! ! !

We don’t need it here, haha, you can get the data directly from obj.data

table.on('tool(table2)', function (obj) {
                switch (obj.event) {
                    case 'particulars':
                        location.href = "/JD/Particulars?productID=" + obj.data.ProductID;
                        break;//获取id跳转到详情页
                    case 'delid':
                        $.ajax({
                            url: '/JD/ShopDelAll?strid=' +  obj.data.ProductID
                            , type: 'Delete'
                            , success: function (d) {
                                obj.del();
                                layer.msg("删除成功");
                            }
                        })
                        break;//这是我的一个ajax删除方法了，记得删除后要有obj.del()哦，否则数据是不会更新的！
                    case 'edit':
                        layer.msg("功能暂未开放，你没有权限");
                        //嘿嘿，修改和删除差不多啦
                        break;
                }

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