avalon 数据为数组，数组元素为对象时，$model在IE8下获取为undefined

Question

avalon 数据为数组，数组元素为对象时，$model在IE8下获取为undefined
代码：

        let wrapOption={
            $id:'wrap',
            showCont:-1,
            items:[{
                name:'基本信息',
                filled:_this.args.base && _this.args.base.length || false || false,
                type:'base'
            },{
                name:'教育背景',
                          filled:_this.args.edu && _this.args.edu.length || false,
                type:'edu'
            }],
            chooseClick(index){
                this.showCont=index;
            }
        }
        let wrapVm=avalon.define(wrapOption);
        let items=wrapVm.items.$model
        console.log(items) //items打出来undefined
        

Answer 1

改用vm.items.toJSON()