如何根据名称的首字母排序

根据汽车品牌名称排序

用到的js

链接：https://pan.baidu.com/s/1jB6kcdahLeI5MiOjw1X9kQ
提取码：9c9n

首先把首字母写在页面上

<div style="display:flex;flex-direction:column;">
        <div>
            <div>B</div>
            <ul id="brand_B" style="display:flex;flex-direction:column;"></ul>
        </div>
        <div>
            <div>C</div>
            <ul id="brand_C" style="display:flex;flex-direction:column;"></ul>
        </div>
        <div>
            <div>D</div>
            <ul id="brand_D" style="display:flex;flex-direction:column;"></ul>
        </div>
        <div>
            <div>*</div>
            <ul id="brand_s" style="display:flex;flex-direction:column;"></ul>
        </div>
    </div>

js

  api.ajax({
            url: 'http://*******/index',
            method: 'post',
            data: {
                values: {}
            }
        }, function(ret, err) {
            if (ret) {
                var brand_name = ret.data.brand;

                var brand_name_html1 = '';
                var brand_name_html2 = '';
                var brand_name_html3 = '';
                var brand_name_html4 = '';

                for (var i = 0; i < brand_name.length; i++) {


                    //遍历出每个品牌车名拼音的首字母
                    var names = JSON.stringify(getPy(brand_name[i].name));
                    //截取首字母 substr(2,1)截取字符串中第二个下标的字母  截取一个
                    var initial = names.substr(2, 1);
                    console.log(initial);
                    var initial_ = String(initial);
                    console.log(initial_);
                    switch (initial_) {
                        case "B":
                            brand_name_html1 += '<li onclick="openwin_chooseCar(' + brand_name[i].id + ',\'' +
                                brand_name[i].name + '\',\'价格\',\'首付\')"> <img  style="width:30px;height:30px;float:left;display:block" src="' + brand_name[i].base_logo + '">' +
                                '<p style="font-size:14px;color:#000;float:left;height:30px;line-height:30px;margin-left:15px;" class="frame1_name">' + brand_name[i].name + '</p></li>';
                               $api.byId('brand_B').innerHTML = brand_name_html1;
                            //跳出此循环  继续下一个
                            continue;
                            case "C":
                                brand_name_html3 += '<li onclick="openwin_chooseCar(' + brand_name[i].id + ',\'' +
                                    brand_name[i].name + '\',\'价格\',\'首付\')"> <img  style="width:30px;height:30px;float:left;display:block" src="' + brand_name[i].base_logo + '">' +
                                    '<p style="font-size:14px;color:#000;float:left;height:30px;line-height:30px;margin-left:15px;" class="frame1_name">' + brand_name[i].name + '</p></li>';
                                   $api.byId('brand_C').innerHTML = brand_name_html2;
                                //跳出此循环  继续下一个
                                continue;
                                case "D":
                                    brand_name_html3 += '<li onclick="openwin_chooseCar(' + brand_name[i].id + ',\'' +
                                        brand_name[i].name + '\',\'价格\',\'首付\')"> <img  style="width:30px;height:30px;float:left;display:block" src="' + brand_name[i].base_logo + '">' +
                                        '<p style="font-size:14px;color:#000;float:left;height:30px;line-height:30px;margin-left:15px;" class="frame1_name">' + brand_name[i].name + '</p></li>';
                                       $api.byId('brand_D').innerHTML = brand_name_html3;
                                    //跳出此循环  继续下一个
                                    continue;
                            // break;
                        default:
                        brand_name_html4 += '<li onclick="openwin_chooseCar(' + brand_name[i].id + ',\'' +
                            brand_name[i].name + '\',\'价格\',\'首付\')"> <img  style="width:30px;height:30px;float:left;display:block" src="' + brand_name[i].base_logo + '">' +
                            '<p style="font-size:14px;color:#000;float:left;height:30px;line-height:30px;margin-left:15px;" class="frame1_name">' + brand_name[i].name + '</p></li>';
                           $api.byId('brand_s').innerHTML = brand_name_html4;

                    }





                }





            } else {
                alert(JSON.stringify(err));
            }
        });