example of fetch in javascript

// There were no quick access to mode and credentials to other fetch answers. // Data you'll be sending const data = { funny: "Absolutely not", educational: "yas" } fetch('https://example.com/api/', { method: 'POST', // The method mode: 'no-cors', // It can be no-cors, cors, same-origin credentials: 'same-origin', // It can be include, same-origin, omit headers: { 'Content-Type': 'application/json', // Your headers }, body: JSON.stringify(data), }).then(returnedData => { // Do whatever with returnedData }).catch(err => { // In case it errors. })

how to use fetch() javascript

//Most API's will only allow you to fetch on their website.
//This means you couldn't run this code in the console on 
// google.com because:
// 		1. Google demands the fetch request be from https
// 		2. open-notify's API blocks the request outside of their website

fetch('http://api.open-notify.org/astros.json')
.then(function(response) {
  return response.json();
})
.then(function(json) {
  console.log(json)
});

// Here is another example. A method (function) that 
// grabs Game of Thrones books from an API ...

function fetchBooks() {
  return fetch('https://anapioficeandfire.com/api/books')
  .then(resp => resp.json())
  .then(json => renderBooks(json));
}

function renderBooks(json) {
  const main = document.querySelector('main')
  json.forEach(book => {
    const h2 = document.createElement('h2')
    h2.innerHTML = `<h2>${book.name}</h2>`
    main.appendChild(h2)
  })
}

document.addEventListener('DOMContentLoaded', function() {
  fetchBooks()
})

Posted by: Guest on March-30-2020

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