今天就跟大家聊聊有关利用layui怎么实现三级联动，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
LayUI的使用
1 、引用
将以下导入到html中：
<link rel="stylesheet" href="/自己的地址/./layui/css/layui.css" rel="external nofollow" media="all"> <script type="text/javascript" src="../自己的地址+/layui/layui.js"></script>
2、输出： hello world
<script type="text/javascript" src="./jquery-3.0.0/jquery-3.0.0.min.js"></script> <!-- 直接将解压的文件辅助到项目 然后导入layui.css和layui.js --> <script type="text/javascript" src="../day/layui/css/layui.css"></script> <script type="text/javascript" src="../day/layui/layui.js"></script> <!--提示：如果是采用非模块化方式（最下面有讲解），此处可换成：./layui/layui.all.js --> <script type="text/javascript" src="./layui/layui.all.js"></script> </head> <body> <script> // layui.use(['layer', 'form'], function(){ // var layer = layui.layer // ,form = layui.form; // layer.msg('Hello World'); // }); $(function(){ layer.msg('Hello World'); }) </script> </body> </html>3、基于layui三级联动
html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <title>基于 Layui form 组件的省市区联动选择的实现</title> <script type="text/javascript" src="./jquery-3.0.0/jquery-3.0.0.min.js"></script> <link rel="stylesheet" href="layui/css/layui.css" /> <script src="layui/css/layui.css"></script> <script type="text/javascript" src="layui/layui.js"></script> <script type="text/javascript" src="./data.js"></script> <script type="text/javascript" src="/province.js"></script> <script type="text/javascript"> var defaults = { s1: 'provid', s2: 'cityid', s3: 'areaid', v1: null, v2: null, v3: null }; </script> </head> <body> <div > <form class="layui-form"> <div class="layui-form-item"> <label class="layui-form-label">选择地区</label> <div class="layui-input-inline"> <select name="provid" id="provid" lay-filter="provid"> <option value="">请选择省</option> </select> </div> <div class="layui-input-inline"> <select name="cityid" id="cityid" lay-filter="cityid"> <option value="">请选择市</option> </select> </div> <div class="layui-input-inline"> <select name="areaid" id="areaid" lay-filter="areaid"> <option value="">请选择县/区</option> </select> </div> </div> </form> </div> </body> </html>province.js var defaults = { s1: 'provid', s2: 'cityid', s3: 'areaid', v1: null, v2: null, v3: null }; var $form; var form; var $; layui.define(['jquery', 'form'], function () { $ = layui.jquery; form = layui.form; $form = $('form'); treeSelect(defaults); }); function treeSelect(config) { config.v1 = config.v1 ? config.v1 : 110000; config.v2 = config.v2 ? config.v2 : 110100; config.v3 = config.v3 ? config.v3 : 110101; $.each(threeSelectData, function (k, v) { appendOptionTo($form.find('select[name=' + config.s1 + ']'), k, v.val, config.v1); }); form.render(); cityEvent(config); areaEvent(config); form.on('select(' + config.s1 + ')', function (data) { cityEvent(data); form.on('select(' + config.s2 + ')', function (data) { areaEvent(data); }); }); function cityEvent(data) { $form.find('select[name=' + config.s2 + ']').html(""); config.v1 = data.value ? data.value : config.v1; $.each(threeSelectData, function (k, v) { if (v.val == config.v1) { if (v.items) { $.each(v.items, function (kt, vt) { appendOptionTo($form.find('select[name=' + config.s2 + ']'), kt, vt.val, config.v2); }); } } }); form.render(); config.v2 = $('select[name=' + config.s2 + ']').val(); areaEvent(config); } function areaEvent(data) { $form.find('select[name=' + config.s3 + ']').html(""); config.v2 = data.value ? data.value : config.v2; $.each(threeSelectData, function (k, v) { if (v.val == config.v1) { if (v.items) { $.each(v.items, function (kt, vt) { if (vt.val == config.v2) { $.each(vt.items, function (ka, va) { appendOptionTo($form.find('select[name=' + config.s3 + ']'), ka, va, config.v3); }); } }); } } }); form.render(); form.on('select(' + config.s3 + ')', function (data) { }); } function appendOptionTo($o, k, v, d) { var $opt = $("<option>").text(k).val(v); if (v == d) { $opt.attr("selected", "selected") } $opt.appendTo($o); } } ======================================================================================= data数据 var threeSelectData={"北京":{val:"110000",items:{"北京":{val:"110100",items:{"东城区":"110101","西城区":"110102","崇文区":"110103","宣武区":"110104","朝阳区":"110105","丰台区":"110106","石景山区":"110107","海淀区":"110108","门头沟区":"110109","房山区":"110111","通州区":"110112","顺义区":"110113","昌平区":"110114","大兴区":"110115","怀柔区":"110116","平谷区":"110117","密云县":"110228","延庆县":"110229"}}}}看完上述内容，你们对利用layui怎么实现三级联动有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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