Always read the property 'length of undefined; The at App getConfig function; At the API request success callback function
TypeError: always read the property 'length of undefined

The code

 getList function () {
Var I=this. 
A. oading (), enclosing setData ({
Loading:! 0 
}), atul gawande et (" wemecms/merch/get_list ", {
Page: this. Data page, 
Cateid: this. Data. Cateid, 
Keyword: this data. The keyword, 
Lat: this data. Mypos. Lat, 
LNG and LNG: this data. Mypos. 
Range: this. Data. Range 
{}, the function (t) 
Var e={
Loading:! 1, 
Total: t.t otal, 
Pagesize: t.p agesize, 
Cates: tc ates, 
Disopt: t.d isopt 
}; 
0 & lt; T.l ist. Length & amp; & (e.p age=i.d ata. Page + 1, e.list=i.d ata. List the concat (t.l ist), 
T.l ist. Length & lt; T.p agesize & amp; & (e.l oaded=! 0), i. etSpeed (t.l ist)), i. etData (e), 
A.h ideLoading (); 
}); 
},