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Home > List of blog posts > 三级联动-2019年5月23日20点00分
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三级联动-2019年5月23日20点00分
小李广花荣
Original
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  1. 下面将展示代码及效果图


  2. 实例

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>三级联动</title>
</head>
<body>
省份：<select name="" id="pro"></select>
市：<select name="" id="city"></select>
地级：<select name="" id="area"></select>

<script src="static/js/jquery-3.4.1.js"></script>
<script>

    $.getJSON('inc/1.json',function (data) {

        var option='<option>请选择省份</option>';
        $.each(data,function (index) {

            option+='<option value="'+data[index]['proId']+'">'+data[index]['proName']+'</option>';
        });
        $('#pro').html(option);

    });
    $('#pro').change(function () {

        $.getJSON('inc/2.json',function (data) {

            var option='<option>请选择市</option>';
            $.each(data,function (index) {

                    if (data[index]['proId'] === parseInt($('#pro').val())){

                        option += '<option value="' + data[index]['cityId'] + '">' + data[index]['cityName'] + '</option>';
                    }

            });
            $('#city').html(option);

        });
    });
    $('#city').change(function () {
        $.getJSON('inc/3.json',function (data) {
            var option='<option value="">请选择地级</option>';
            $.each(data,function (index) {

                if (data[index]['cityId'] === parseInt($('#city').val())){

                    option += '<option value="' + data[index]['areaId'] + '">' + data[index]['areaName'] + '</option>';
                }

            });
            $('#area').html(option);

        });
    });
    $('#area').change(function () {
        console.log($(this).find(':selected').text());

    })



</script>
</body>
</html>

    运行实例 »

    点击 "运行实例" 按钮查看在线实例

    QQ图片20190607183235.png

  3. 学习三级联动  首先要获取JSON的数据

    用$.getJSON方法 获取数据 

    获取的是数组 需要用$.each进行遍历  


Correction status：Uncorrected

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