javascript - How to get all the data in a page and then convert it into a json format string and pass it to the background

Question

The data in the page is placed in a p according to the user's selection, but after obtaining the data of the page pair, how to make it into a json format string.

Answer 1

Sounds like a form, which can be obtained with jQuery and then sent to the backend using ajax
It is recommended that the subject post the code, otherwise it will be difficult to judge

Answer 2

var jsonStr = JSON.stringify(jsonData)；
var jsonData = JSON.parse(jsonStr);