关于layui+php，三级联动-编辑回显的问题。

注

忍不住吐槽一波。都什么年代了。现在都前后端分离，但是公司老项目非得用tp+layui。。

代码如下

layui.use(['fORM'], function () {        var form = layui.form;//PHP代码渲染页面的时候，将一级分类id和二级分类id带过来，存到页面input框中，属性为hidden。方便获取这里js获取        var first_cateGory_id = $('#first_category_id').val()        var second_category_id = $('#second_category_id').val()        var third_category_id = $('#third_category_id').val()        // 加载省份数据        $.ajax({            url: '',            type: 'post',            dataType: 'JSON',            data: {parentId: 0},            success: function (res) {            //这里是select下拉框的id                var provinceSelect = $('#province');                var citySelect = $('#city');                var districtSelect = $('#district');                $.each(res.data, function (index, item) {                    if (item.id == first_category_id) {                        provinceSelect.append('+ item.id + '" selected>' + item.name + '');                        $.ajax({url: '',type: 'post',dataType: 'json',data: {parentId: item.id},success: function (res) {    $.each(res.data, function (index, item) {        if (item.id == second_category_id) {            citySelect.append('+ item.id + '" selected>' + item.name + '');            $.ajax({                url: '',                type: 'post',                dataType: 'json',                data: {parentId: item.id},                success: function (res) {                    $.each(res.data, function (index, item) {                        if (item.id == third_category_id) {districtSelect.append('+ item.id + '" selected>' + item.name + '');                        } else {districtSelect.append('+ item.id + '">' + item.name + '');                        }                    })                }            })            form.render('select');        } else {            citySelect.append('+ item.id + '">' + item.name + '');        }    })}                        })                        form.render('select');                    } else {                        provinceSelect.append('+ item.id + '">' + item.name + '');                    }                });                form.render('select');            }        });        // 监听下拉框变化事件--这里和回显没有关系了 点击事件触发        form.on('select(province)', function (data) {            var provinceId = data.value;            if (provinceId !== '') {                // 加载数据                $.ajax({                    url: '',                    type: 'post',                    dataType: 'json',                    data: {parentId: provinceId},                    success: function (res) {                        var citySelect = $('#city');                        citySelect.empty().append('请选择');                        $.each(res.data, function (index, item) {citySelect.append('+ item.id + '">' + item.name + '');                        });                        form.render('select');                    }                });            } else {                // 清空下面两级的数据                $('#city').empty().append('请选择');                $('#district').empty().append('请选择');                form.render('select');            }        });        // 监听下拉框变化事件--这里和回显没有关系了 点击事件触发        form.on('select(city)', function (data) {            var cityId = data.value;            if (cityId !== '') {                // 加载区县数据                $.ajax({                    url: '',                    type: 'post',                    dataType: 'json',                    data: {parentId: cityId},                    success: function (res) {                        var districtSelect = $('#district');                        districtSelect.empty().append('请选择');                        $.each(res.data, function (index, item) {districtSelect.append('+ item.id + '">' + item.name + '');                        });                        form.render('select');                    }                });            } else {                // 清空区县数据                $('#district').empty().append('请选择');                form.render('select');            }        });

html代码

<div class="layui-form-item">   <label class="layui-form-label">商品分类：label>   <div class="layui-input-inline">       <select name="first" id="province" lay-filter="province">           <option value="">请选择option>       select>   div>   <div class="layui-input-inline">       <select name="second" id="city" lay-filter="city">           <option value="">请选择option>       select>   div>   <div class="layui-input-inline">       <select name="third" id="district" lay-filter="district">           <option value="">请选择option>       select>   div>div>          <input type="hidden" id="third_category_id" value="{$info.category_id}"> <input type="hidden" id="second_category_id" value="{$info.second_category_id}"> <input type="hidden" id="first_category_id" value="{$info.first_category_id}">

来源地址：https://blog.csdn.net/handsomezls/article/details/132542736