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Body mixin의 json() 매서드는 Response 스트림을 가져와 스트림이 완료될때까지 읽는다. 이 메서드는 body 텍스트를 JSON으로 바꾸는 결과로 해결되는 promise를 반환한다.

구문

response.json().then(function(data) {
  // do something with your data
});

매개변수

없음.

반환값

A promise that resolves with the result of parsing the body text as JSON. This could be anything that can be represented by JSON — an object, an array, a string, a number...

Example

In our fetch json example (run fetch json live), we create a new request using the Request.Request constructor, then use it to fetch a .json file. When the fetch is successful, we read and parse the data using json(), then read values out of the resulting objects as you'd expect and insert them into list items to display our product data.

var myList = document.querySelector('ul');

var myRequest = new Request('products.json');

fetch(myRequest)
  .then(function(response) { return response.json(); })
  .then(function(data) {
    for (var i = 0; i < data.products.length; i++) {
      var listItem = document.createElement('li');
      listItem.innerHTML = '<strong>' + data.products[i].Name + '</strong> can be found in ' +
                           data.products[i].Location +
                           '. Cost: <strong>£' + data.products[i].Price + '</strong>';
      myList.appendChild(listItem);
    }
  });

Specifications

Specification Status Comment
Fetch
The definition of 'json()' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support 42
Full support 42
Full support 41
Disabled
Disabled From version 41: this feature is behind the Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.
Edge Full support YesFirefox Full support 39
Full support 39
Full support 34
Disabled
Disabled From version 34: this feature is behind the dom.fetch.enabled preference. To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 29
Full support 29
Full support 28
Disabled
Disabled From version 28: this feature is behind the Experimental Web Platform Features preference.
Safari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile Full support YesFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.
User must explicitly enable this feature.

See also

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