返回数据多了“var data_json =”，respsonse.json()报错

response.text 可以正确执行，返回 var data_json ={"flag":ture,"j001":{"code":"001","pricr":""p1".....},"j002":{"code":"002","pricr":""p1".....},...,}"errorCode":[]}
但如果调用respsonse.json()则报错,怀疑是格式问题，多了“var data_json =”, 想着就是要取到后面J001,J002,,,, 数值，但多种尝试都不行。

把返回的数据先转成text字符删除var data_json =后再转成json