Toggle font awesome class on button click

Question

I have the code as here in this jsfiddle, I want the font awesome icon to change on button click using javascript, but it does\'nt seem to work. I\'m new to javascript so pl

Answer 1

When using jQuery you never need to use an inline attribute eventHandler.

onclick=

• Demo 1 uses jQuery .toggleClass()

• Demo 2 uses JavaScript .classList.toggle()

• Demo 3 uses CSS :checked pseudo-class

Update v4 to v5: Go to Start | Font Awesome. There are some class changes as well. See Demo 4.

Demo 1 -- jQuery

$('button').on('click', fav);

function fav(e) {
  $(this).find('.fa').toggleClass('fa-star-o fa-star');
}

:root {
  font: 400 16px/1.5 Verdana;
}

button {
  display: inline-block;
  font: inherit;
  padding: 0px 5px;
  cursor: pointer;
}

button::after {
  content: ' Favorite'
}

Demo 2 -- Plain JavaScript

document.querySelector('button').addEventListener('click', fav);

function fav(e) {
  const tgt = e.target.firstElementChild;
  tgt.classList.toggle('fa-star');
  tgt.classList.toggle('fa-star-o');
}

:root {
  font: 400 16px/1.5 Verdana;
}

button {
  display: inline-block;
  font: inherit;
  padding: 0px 5px;
  cursor: pointer;
}

button::after {
  content: ' Favorite'
}

Demo 3 -- Pure CSS

:root {
  font: 400 16px/1.5 Verdana;
}

#fav {
  display: none
}

#fav+label {
  display: inline-block;
  border: 2px outset grey;
  padding: 0px 5px;
  cursor: pointer;
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;
}

#fav+label::after {
  content: ' Favorite'
}

#fav+label>.fa-star-o {
  display: inline-block
}

#fav+label>.fa-star {
  display: none;
}

#fav:checked+label>.fa-star-o {
  display: none;
}

#fav:checked+label>.fa-star {
  display: inline-block
}

Demo 4 -- Font Awesome 5

jQuery / JavaScript / CSS

/* #1 jQuery */
$('button.jq').on('click', jQFav);
function jQFav(e) {
  $(this).find('.fa-star').toggleClass('fas far');
}

/* #2 JavaScript */
document.querySelector('button.js').addEventListener('click', JSFav);
function JSFav(e) {
  const tgt = e.target.firstElementChild;
  tgt.classList.toggle('far');
  tgt.classList.toggle('fas');
}

/* #1 JS / #2 jQ */
:root {
  font: 400 16px/1.5 Verdana;
}

button {
  display: inline-block;
  font: inherit;
  padding: 0px 5px;
  cursor: pointer;
}

button::after {
  content: ' Favorite'
}

/* #3 CSS */

#fav {
  display: none
}

#fav+label {
  display:inline-block;
  border: 2px outset grey;
  padding: 0px 5px;
  cursor: pointer;
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;
}

#fav+label::after {
  content: ' Favorite'
}

#fav+label>.far {
  display: inline-block;
}

#fav+label>.fas {
  display: none;
}

#fav:checked+label>.far {
  display: none;
}

#fav:checked+label>.fas {
  display: inline-block
}

jQuery


  





Plain JavaScript


  





Pure CSS