JavaScript Requests

const getSuggestions = async () => { const wordQuery = inputField.value; const endpoint = `${url}${queryParams}${wordQuery}`; try{ const response = await fetch(endpoint, {cache: 'no-cache'}); if(response.ok){ const jsonResponse = await response.json() } } catch(error){ console.log(error) } } 

fetch('https://api-xxx.com/endpoint', { method: 'POST', body: JSON.stringify({id: "200"}) }).then(response => { if(response.ok){ return response.json(); } throw new Error('Request failed!'); }, networkError => { console.log(networkError.message); }).then(jsonResponse => { console.log(jsonResponse); }) 

fetch('url') .then( response => { console.log(response); }, rejection => { console.error(rejection.message); ); 

fetch('url-that-returns-JSON') .then(response => response.json()) .then(jsonResponse => { console.log(jsonResponse); }); 

fetch(url, { method: 'POST', headers: { 'Content-type': 'application/json', 'apikey': apiKey }, body: data }).then(response => { if (response.ok) { return response.json(); } throw new Error('Request failed!'); }, networkError => { console.log(networkError.message) }) } 

const data = { fish: 'Salmon', weight: '1.5 KG', units: 5 }; const xhr = new XMLHttpRequest(); xhr.open('POST', '/inventory/add'); xhr.responseType = 'json'; xhr.send(JSON.stringify(data)); xhr.onload = () => { console.log(xhr.response); }; 

const req = new XMLHttpRequest(); req.responseType = 'json'; req.open('GET', '/getdata?id=65'); req.onload = () => { console.log(xhr.response); }; req.send(); 

const xhr = new XMLHttpRequest(); xhr.open('GET', 'mysite.com/getjson'); 

XMLHttpRequest is a browser-level API that enables the client to script data transfers via JavaScript, NOT part of the JavaScript language.

const jsonObj = { "name": "Rick", "id": "11A", "level": 4 }; 

Also see: JSON cheatsheet