Vue assignment, is this allowed?

Question

The returned json format is {"desc":"OK","status":1000,"data":{"wendu":"17","type": "clear", "yesterday" :{"wendu": "20", "type":"Cloudy"},"city":"Beijing"}}

registerData.wendu can be displayed normally, but registerData.yesterday.type reports an error

Answer 1

Your json format is not legal at all.

Let you change his code in the background, the format is wrong

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The data can be extracted according to the format you provided later. You can console.log() to output your registerData.
Maybe there is an extra layer of data inside

Answer 2

The brackets are wrong. . The additional json should be in double quotes

Answer 3

Single quotes cannot be used in JSON

{"data": {{"wendu": "17", "type": "晴"}, "yesterday": {"wendu": "20", "type": "多云"}}

Answer 4

....Forget it, I can't understand the description of the problem