Things to note when converting string to json

I have been working on a post for a day, sometimes it is normal and sometimes it is wrong!

let str = "{'name':'wanglei'}"; let obj = JSON.parse(str);

The above will report an error:

VM143:1 Uncaught SyntaxError: Unexpected token ' in JSON at position 1 at JSON.parse () at :1:6 str = '{"name":"wanglei"}';

That’s it!

key and value must be in double quotes and comply with json specifications

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