return data from fetch api code example

Example 1: How to Use the JavaScript Fetch API to Get Data

fetch('http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0002/?gameid=221380')
    .then(function(response) {
        return response.json();
    })
    .then(function(myJson) {
        console.log(JSON.stringify(myJson));
    });

Example 2: return value from fetch javascript

function getvals(){
    return fetch('https://jsonplaceholder.typicode.com/posts',
    {
    	method: "GET",
      headers: {
        'Accept': 'application/json',
        'Content-Type': 'application/json',
      },
    })
    .then((response) => response.json())
    .then((responseData) => {
      console.log(responseData);
      return responseData;
    })
    .catch(error => console.warn(error));
  }
  
  getvals().then(response => console.log(response));

Example 3: get data from fetch response html

fetch('/about').then(function (response) {
	// The API call was successful!
	return response.text();
}).then(function (html) {

	// Convert the HTML string into a document object
	var parser = new DOMParser();
	var doc = parser.parseFromString(html, 'text/html');

	// Get the image file
	var img = doc.querySelector('img');
	console.log(img);

}).catch(function (err) {
	// There was an error
	console.warn('Something went wrong.', err);
});

Example 4: fetch get data js

var myHeaders = new Headers();

var myInit = { method: 'GET',
               headers: myHeaders,
               mode: 'cors',
               cache: 'default' };

fetch('flowers.jpg',myInit)
.then(function(response) {
  return response.blob();
})
.then(function(myBlob) {
  var objectURL = URL.createObjectURL(myBlob);
  myImage.src = objectURL;
});