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JavaScript Create a Reusable Fetch Function

Posted by Taylor Hall
.a{fill-rule:evenodd;}techdegree seal-36
Taylor Hall
Front End Web Development Techdegree Graduate 14,496 Points

Why did my code not display anything? Please update this workshop to be more layman terms.

const select = document.getElementById('breeds'); const card = document.querySelector('.card'); const form = document.querySelector('form');

// ------------------------------------------ // FETCH FUNCTIONS // ------------------------------------------

function fetchData(url) { return fetch(url) .then(res => res.json()) }

fetchData('https://dog.ceo/api/breeds/list') .then(data => generateOptions(data.message))

fetch('https://dog.ceo/api/breeds/image/random') .then(data => generateImage(data.message))

// ------------------------------------------ // HELPER FUNCTIONS // ------------------------------------------

function generateOptions(data) { const options = data.map(item => <option value='${item}'>${item}</option> ).join(''); select.innerHTML = options; }

function generateImage(data) { const html = <img src='${data}' alt> <p>Click to view images of ${select.value}s</p> ; card.innerHTML = html; }

function fetchBreedImage() { const breed = select.value; const img = card.querySelector('img'); const p = card.querySelector('p');

fetchData(https://dog.ceo/api/breed/${breed}/images/random) .then(data = { img.src = data.message; img.alt = breed; p.textContent = Click to view more ${breed}s }) }

// ------------------------------------------ // EVENT LISTENERS // ------------------------------------------

select.addEventListener('change', fetchBreedImage); card.addEventListener('click', fetchBreedImage);

// ------------------------------------------ // POST DATA // ------------------------------------------

2 Answers

Lars Gessner
Lars Gessner
10,919 Points
Lars Gessner
Lars Gessner
10,919 Points 
const select = document.getElementById('breeds');
const card = document.querySelector('.card');
const form = document.querySelector('form');

// ------------------------------------------ // FETCH FUNCTIONS // ------------------------------------------

function fetchData(url) { 
  return fetch(url) 
  .then(res => res.json()) 
}

fetchData('https://dog.ceo/api/breeds/list') 
.then(data => generateOptions(data.message))

fetch('https://dog.ceo/api/breeds/image/random') 
.then(data => generateImage(data.message))

// ------------------------------------------ // HELPER FUNCTIONS // ------------------------------------------

function generateOptions(data) { 
  const options = data.map(item => ` 
    <option value='${item}'>${item}</option> `).join(''); 
    select.innerHTML = options; 
  }

function generateImage(data) { 
    const html = `
     <img src='${data}' alt> <p>Click to view images of ${select.value}s</p>` ; 
     card.innerHTML = html; 
  }

function fetchBreedImage() { 
    const breed = select.value; 
    const img = card.querySelector('img'); 
    const p = card.querySelector('p');

  fetchData(`https://dog.ceo/api/breed/${breed}/images/random`) 
    .then(data => {
        img.src = data.message 
        img.alt = breed 
        p.textContent = `Click to view more ${breed}s `
    })   
  }


select.addEventListener('change', fetchBreedImage); 
card.addEventListener('click', fetchBreedImage);

Can you check the format - this should work

Piotr Sochaczewski
Piotr Sochaczewski
13,038 Points
Piotr Sochaczewski
Piotr Sochaczewski
13,038 Points

in line( 16?) : fetch('https://dog.ceo/api/breeds/image/random') .then(data => generateImage(data.message))

should be "fetchData" not "fetch" the same problem will be displayed in the answer above.