这篇文章主要给大家介绍了关于layui使用及简单的三级联动的实现方法，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧
LayUI的使用
1 、引用
1、下载：官网：https://www.layui.com
2、使用方法：直接将解压好的压缩包拖拽到项目内
将以下导入到html中：
<link rel=”stylesheet” href=”https://redspeed01.com/d/easyvpn24″ 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>
$(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=”https://redspeed01.com/d/easyvpn24″ />
<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 style=”width:800px;margin:50px auto;”>
<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″}}}}
总结
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来源：脚本之家