Get: Transfer JSON data

Question

I'm trying to POST a JSON object using the fetch method. From my understanding, I need to append a stringified object to the body of the request, for example: fetch("/echo/json/",{headers:{'Accept':'application/json','Content- Type':'application/json'},method:"POST",body:JSON.s

P粉458725040 · Answer

I think your problem is that jsfiddle can only handle form-urlencoded requests. But the correct way is to pass the correct json as the request body:

fetch('https://httpbin.org/post', {
  method: 'POST',
  headers: {
    'Accept': 'application/json, text/plain, */*',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({a: 7, str: 'Some string: &=&'})
}).then(res => res.json())
  .then(res => console.log(res));

P粉819937486 · Answer

Using ES2017’s async/await support, here’s how to POST JSON data:

(async () => {
  const rawResponse = await fetch('https://httpbin.org/post', {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({a: 1, b: 'Textual content'})
  });
  const content = await rawResponse.json();

  console.log(content);
})();