How do I fix this JSON parsing issue?-CodePudding

I send data with fetch() in HTML to an express API, this is how it comes out in the req.body (I use body-parser)

{
  '{"address":"a","town":"NYC","details":"a","appr":': { '"Car1"': '' }
}

it's all "stringy", as the only way I know to "parse it" to send it, is to send it with JSON.stringify. But, upon getting the info, it's "unparseable", JSON.parse errors with "unexpected string in JSON at position 62"

I send it like:

    body: JSON.stringify({
      address: address,
      town: town,
      details: details,
      appr: apr,
    }),

I've tried everything I know how to do to attempt to "make it a JSON" again, but nothing has worked.

CodePudding user response：

1 - Don't forget to add header to fetch

 const response = await fetch(url, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json' // => this is important
    },
    body: JSON.stringify(data)
  });

2 - Don't forget to add this on express

app.use(bodyParser.json())

Note: If you are using Express v4.16.0 or newer you can use built-in middleware. Thanks to @Dov Rine

app.use(express.json());

3 - req.body will be available as object after this. You should not use JSON.parse(req.body) because body-parser does this for you.

let address = req.body.address;