// jQuery
$(document).ready(function() {
// code
})
// Vanilla
document.addEventListener('DOMContentLoaded', function() {
// code
})// jQuery
$('a').click(function() {
// code…
})
// Vanilla
[].forEach.call(document.querySelectorAll('a'), function(el) {
el.addEventListener('click', function() {
// code…
})
})// jQuery
var divs = $('div')
// Vanilla
var divs = document.querySelectorAll('div')// jQuery
var newDiv = $('<div/>')
// Vanilla
var newDiv = document.createElement('div')// jQuery
$('img').filter(':first').attr('alt', 'My image')
// Vanilla
document.querySelector('img').setAttribute('alt', 'My image')// jQuery
newDiv.addClass('foo')
// Vanilla
newDiv.classList.add('foo')// jQuery
newDiv.toggleClass('foo')
// Vanilla
newDiv.classList.toggle('foo')// jQuery
$('body').append($('<p/>'))
// Vanilla
document.body.appendChild(document.createElement('p'))// jQuery
var clonedElement = $('#about').clone()
// Vanilla
var clonedElement = document.getElementById('about').cloneNode(true)// jQuery
$('#wrap').empty()
// Vanilla
var wrap = document.getElementById('wrap')
while(wrap.firstChild) wrap.removeChild(wrap.firstChild)// jQuery
var parent = $('#about').parent()
// Vanilla
var parent = document.getElementById('about').parentNode// jQuery
if($('#wrap').is(':empty'))
// Vanilla
if(!document.getElementById('wrap').hasChildNodes())// jQuery
var nextElement = $('#wrap').next()
// Vanilla
var nextElement = document.getElementById('wrap').nextSibling// jQuery
$.get('//example.com', function (data) {
// code
})
// Vanilla
var httpRequest = new XMLHttpRequest()
httpRequest.onreadystatechange = function (data) {
// code
}
httpRequest.open('GET', url)
httpRequest.send()// jQuery
$.post('//example.com', { username: username }, function (data) {
// code
})
// Vanilla
var httpRequest = new XMLHttpRequest()
httpRequest.onreadystatechange = function (data) {
// code
}
httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
httpRequest.open('POST', url)
httpRequest.send('username=' + encodeURIComponent(username))// jQuery
$.getJSON('//openexchangerates.org/latest.json?callback=?', function (data) {
// code
})
// Vanilla
function success(data) {
// code
}
var scr = document.createElement('script')
scr.src = '//openexchangerates.org/latest.json?callback=formatCurrency'
document.body.appendChild(scr)Here are a few additional references demonstrating vanilla javascript equivalents of jquery methods:
Also, see the two part series showing equivalents for ...
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[Events, Ajax and Utilities](http://www.sitepoint.com/jquery-vs-raw- javascript-3-events-ajax/)
For the same reason people sometimes prefer to use vanilla css isntead of a framework. even if you are only using 1 method of jquery, the whole library gets loaded along with the page, which makes for a really heavy page