How to process JSON?

Question

JavaScript

When interacting with the server, data is received in JSON format. But some data comes with a syntax error. Example: . For some reason, there is undefined at the beginning of the line. How can I check for undefined at the beginning of a string and remove it? undefined{cars: "BMW, LAMBA, PORSCHE"}

Answer 1

How can I check for undefined at the beginning of a string and remove it?

Or maybe you'd better do it so that there are no undefined? - fix the server code.
If you want to go the way of the govnocoder: . str.replace(/^undefined/, '')