js 字符串拼接 html 累加 html 叠加

正常来说已经使用es6 的 模板了如``

//页面层
            layer.open({
                    type: 1,
                    content:`<div class="child_card">
                                <div class="mui-card-content ">
                                    <div class="mui-row ">
                                        <div class="mui-col-xs-12 ">
                                            <ul class="mui-table-view ">
                                                <li class="mui-table-view-cell "><i class="icon iconfont"></i> 穿衣 [${this.life.chuanyi[0]}]：<p style="margin: 15px;    word-break: break-all;">${this.life.chuanyi[1]}</p></li>
                                                <li class="mui-table-view-cell ">  <i class="icon iconfont"></i> 感冒 [${this.life.ganmao[0]}]：<p style="margin: 15px;    word-break: break-all;">${this.life.ganmao[1]}</p></li>
                                                <li class="mui-table-view-cell "><i class="icon iconfont"></i> 运动 [${this.life.yundong[0]}]：<p style="margin: 15px;    word-break: break-all;">${this.life.yundong[1]}</p></li>
                                                <li class="mui-table-view-cell "><i class="icon iconfont"></i> 空调 [${this.life.kongtiao[0]}]：<p style="margin: 15px;    word-break: break-all;">${this.life.kongtiao[1]}</p></li>
                                                <li class="mui-table-view-cell "> <i class="icon iconfont"></i> 紫外线 [${this.life.ziwaixian[0]}]：<p style="margin: 15px;    word-break: break-all;">${this.life.ziwaixian[1]}</p></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                            </div>`
});

但极少情况下还是使用原始的拼接，以下这种方法会比较舒服

  var panelBuffer = '<div class="mui-poppicker">\
        <div class="mui-poppicker-header">\
            <button class="mui-btn mui-poppicker-btn-cancel">取消</button>\
            <button class="mui-btn mui-btn-blue mui-poppicker-btn-ok">确定</button>\
            <div class="mui-poppicker-clear"></div>\
        </div>\
        <div class="mui-poppicker-body">\
        </div>\
    </div>';

    var pickerBuffer = '<div class="mui-picker">\
        <div class="mui-picker-inner">\
            <div class="mui-pciker-rule mui-pciker-rule-ft"></div>\
            <ul class="mui-pciker-list">\
            </ul>\
            <div class="mui-pciker-rule mui-pciker-rule-bg"></div>\
        </div>\
    </div>';