javascript - After Ajax returns the data in json format, the data taken out after parsing is undefined?

Question

As the title states, the background data format is as shown in the figure

Some data has been read in the front desk, and some data show undefind. Even if I use the eval function to convert it, it doesn’t work either.

Solution...

Answer 1

If you want to post the code, it is obvious that there is no field.
Check if it is spelled correctly and pay attention to the capitalization.

Answer 2

Obviously the field is wrong, just check the corresponding code carefully.

Answer 3

The code is written wrong