Use of layui event monitoring

When using layui's form form for verification and submission, if it is combined with vue or three-level linkage, event monitoring is required.

Specific syntax:

form.on('event(过滤器值)', callback);

can be used to monitor: changes in select, checkbox, switch, radio, submit

1. Monitor changes in select

<!-- 不用form 用div也可以 -->
<form class="layui-form">
    <div class="layui-form-item">
        <label class="layui-form-label">下拉选择框</label>
        <div class="layui-input-block">
            <select name="interest" lay-filter="aihao">
                <option value="0">写作</option>
                <option value="1">阅读</option>
                <option value="2">听歌</option>
                <option value="4">游戏</option>
            </select>
        </div>
    </div>
</form>
<script type="text/javascript" src="./layui/layui.js"></script>
<script type="text/javascript">
layui.use(&#39;form&#39;, function(){
    var form = layui.form;
    form.on(&#39;select(aihao)&#39;,function(data){
        console.log(data);
        console.log(data.elem); //得到select原始DOM对象
        console.log(data.value); //得到被选中的值
        console.log(data.othis); //得到美化后的DOM对象
    });
});
</script>

Similarly, monitor checkbox check

form.on('checkbox(filter)', function(data){
    console.log(data.elem); //得到checkbox原始DOM对象
    console.log(data.elem.checked); //是否被选中，true或者false
    console.log(data.value); //复选框value值，也可以通过data.elem.value得到
    console.log(data.othis); //得到美化后的DOM对象
});

Monitor switch:

form.on('switch(filter)', function(data){
　　console.log(data.elem); //得到checkbox原始DOM对象
　　console.log(data.elem.checked); //开关是否开启，true或者false
　　console.log(data.value); //开关value值，也可以通过data.elem.value得到
　　console.log(data.othis); //得到美化后的DOM对象
});

Monitor radio single selection:

form.on('radio(filter)', function(data){
    console.log(data.elem); //得到radio原始DOM对象
    console.log(data.value); //被点击的radio的value值
});

Monitor submit submission:

<button lay-submit lay-filter="*">提交</button>
form.on(&#39;submit(*)&#39;, function(data){
    console.log(data.elem) //被执行事件的元素DOM对象，一般为button对象
    console.log(data.form) //被执行提交的form对象，一般在存在form标签时才会返回
    console.log(data.field) //当前容器的全部表单字段，名值对形式：{name: value}
    return false; //阻止表单跳转。如果需要表单跳转，去掉这段即可。
});

Update For more layui knowledge, please pay attention to the layui usage tutorial column.

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