异步渲染页面怎么点击checkbox获取value值

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前后端分离时后端向前端传递json数据前端根据需要进行页面渲染因为是异步渲染想要获取获取渲染数据里面的值时获取不到的

介绍两个方法：

1，设置全局变量即渲染时在html页面设置全局变量

如图：

我们要往ul标签内渲染数据

script代码

<script>

    var rest = $.cookie('username')

            $(".Show").html(rest);

    var username = $.cookie('username')

        let param = new URLSearchParams();

        param.append('username',username);

        axios({

        url:'http://127.0.0.1:8000/md_admin/carlist',

        data:param,

        // async:false,

        method:'post',

        responseType:'json'

        })

        .then(function(obj){

            console.log(obj.data);

            let pro_list = JSON.parse(obj.data[1]);

            let price_list = obj.data[0]

            let sum_pro  = obj.data[2]

            let ul = ''

            for (let i=0;i<pro_list.length;i++){

                ul += '<ul class="cart_list_td clearfix" v-for="(sku,index) in cart" id="porcdesc" ><li class="col01"><input type="checkbox" name="procduc_id" v-model="sku.selected" @change="update_selected(index)" value="'+pro_list[i]['pk']+','+price_list[pro_list[i]['pk']]*pro_list[i]['fields']['price']+'" value1="'+price_list[pro_list[i]['pk']]+'" onclick="onlyone()"></li><li class="col02"><img src='+pro_list[i]['fields']['img']+'></li><li class="col03" id="prodtit">'+pro_list[i]['fields']['title']+'</li><li class="col05" id="prodpic">'+pro_list[i]['fields']['price']+'元</li><li class="col06"><div class="num_add"><a  class="add fl" onclick="addprod('+pro_list[i]['pk']+',\'+\')">+</a><input v-model="sku.count" @focus="origin_input=sku.count" @blur="on_input(index)" type="text" class="num_show fl" value='+price_list[pro_list[i]['pk']]+' ><a @click="on_minus(index)" class="minus fl" onclick="addprod('+pro_list[i]['pk']+',\'-\')">-</a></div></li><li class="col07">'+price_list[pro_list[i]['pk']]*pro_list[i]['fields']['price']+' 元</li><li class="col08"><a @click="on_delete(index)" onclick="delpro('+pro_list[i]['pk']+')">删除</a></li><li id="pkid" value="'+pro_list[i]['pk']+'"></ul>'

            }

            $("#pro_list").html(ul);

            $(".sum_pro").html(sum_pro);

            });

            function checkorder(){

                var _items = [];

                var items = document.getElementsByName('procduc_id');

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

                if (items[i].checked){_items.push(items[i].value);}}

                console.log(_items);

                let param = new URLSearchParams();

                param.append('_items',_items);

                axios({

                url:'http://127.0.0.1:8000/md_admin/orderlist',

                data:param,

                method:'post',

                responseType:'text',

                })

                .then(function(obj){

                    console.log(obj.data);

                    // window.location.href='http://127.0.0.1:8080/cart.html'

                })

            }