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Vanilla JS equivalents of jQuery methods

Sans jQuery

Events

// 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…
  })
})

Selectors

// jQuery
var divs = $('div')

// Vanilla
var divs = document.querySelectorAll('div')
// jQuery
var newDiv = $('<div/>')

// Vanilla
var newDiv = document.createElement('div')

Attributes

// jQuery
$('img').filter(':first').attr('alt', 'My image')

// Vanilla
document.querySelector('img').setAttribute('alt', 'My image')

Classes

// jQuery
newDiv.addClass('foo')

// Vanilla
newDiv.classList.add('foo')
// jQuery
newDiv.toggleClass('foo')

// Vanilla
newDiv.classList.toggle('foo')

Manipulation

// 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)

Transversing

// 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

AJAX

GET

// jQuery
$.get('//example.com', function (data) {
  // code
})

// Vanilla
var httpRequest = new XMLHttpRequest()
httpRequest.onreadystatechange = function (data) {
  // code
}
httpRequest.open('GET', url)
httpRequest.send()

POST

// 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))

JSONP

// 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)

More

Here are a few additional references demonstrating vanilla javascript equivalents of jquery methods:

Also, see the two part series showing equivalents for ...

@oohkumar
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oohkumar commented Nov 19, 2020

This is why jQuery will never die. Why would any programmer want to use vanilla JS? Three times as many characters in vanilla Javascript to perform the same function as jQuery. Ridiculous. The performance difference doesn't justify the overly complicated and difficult-to-read syntax of vanilla JS.

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ghost commented Jan 2, 2021

This is why jQuery will never die. Why would any programmer want to use vanilla JS? Three times as many characters in vanilla Javascript to perform the same function as jQuery. Ridiculous. The performance difference doesn't justify the overly complicated and difficult-to-read syntax of vanilla JS.

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

@pthurmond
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While I'm glad for the examples to learn more vanilla js, I gotta say that every single one is far more verbose then the jQuery equivalent. Some are even excessively so. That alone makes me want to stick with jQuery. I just don't see any good reason to switch to Vanilla JS unless I am using a framework like Vue.js. I just haven't heard any truly compelling arguments.

@johnsfuller
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While I'm glad for the examples to learn more vanilla js, I gotta say that every single one is far more verbose then the jQuery equivalent. Some are even excessively so. That alone makes me want to stick with jQuery. I just don't see any good reason to switch to Vanilla JS unless I am using a framework like Vue.js. I just haven't heard any truly compelling arguments.

Benchmark your pagespeed with and without. Look on a large website for time the browser spends on scripting with jQuery vs without. Its a pretty resource-expensive library to simply query dom elements.

@happytm
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happytm commented May 7, 2022

Nice discussion. I would like to see if anyone have a pure javascript solution for following code:

Thanks.

<html> 
<head> 
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1"> 
<title>Select Box</title> 
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
</head> 
<body>
<h2>Select Box</h2>

<form action="">
  
<SELECT class="combine" id ="command" name = "a">
    <option></option>
    <option>SELECT</option>
    <option>Digital Write</option>
    <option>Analog Write</option>
    <option>Digital Read</option>
    <option>Analog Read</option>
    <option>Neopixel</option>
    <option>Set AP Channel</option>
    <option>Set Sleep Time</option>
    <option>Set Mode</option>
</SELECT>

<SELECT class="combine" id ="device" name = "b">
    <option></option>
    <option>Livingroom</option>
    <option>Kitchen</option>
    <option>Bedroom1</option>
    <option>Bedroom2</option>
    <option>Bathroom1</option>
    <option>Bathroom2</option>
    <option>Laundry</option>
    <option>Office</option>
    
</SELECT>

<SELECT class="combine" id ="command1" name = "c" >
    <option>00</option>
    <option>01</option>
    <option>02</option>
    <option>03</option>
    <option>04</option>
   </SELECT>

<SELECT class="combine" id ="command2" name = "d">
    <option>00</option>
    <option>01</option>
    <option>02</option>
    <option>03</option>
    <option>04</option>
    
</SELECT>

<SELECT class="combine" id ="command3" name = "e">
    <option>00</option>
    <option>01</option>
    <option>02</option>
    <option>03</option>
    <option>04</option>
    
</SELECT>

<SELECT class="combine" id ="command4" name = "f" >
    <option>00</option>
    <option>01</option>
    <option>02</option>
    <option>03</option>
    <option>04</option>
    
</SELECT>


<br>

<script>
var attachEvent = function(node, event, listener, useCapture) {
  // Method for FF, Opera, Chrome, Safari
  if ( window.addEventListener ) {
    node.addEventListener(event, listener, useCapture || false);
  }
  // IE has its own method
  else {
    node.attachEvent('on'+event, listener);
  }
};

// Once the window loads and the DOM is ready, attach the event to the main
  attachEvent(window, "load", function() {
  var select_command = document.getElementById("command");

  var selectHandler = function() {
      option1 = document.getElementById("device"),
      option2 = document.getElementById("command1");
      option3 = document.getElementById("command2");
      option4 = document.getElementById("command3");
      option5 = document.getElementById("command4");
      
     
// Show and hide the appropriate select's
     if (this.value == "Neopixel") {
     
       option1.style.display = "";
       option2.style.display = "";
       option3.style.display = "";
       option4.style.display = "";
       option5.style.display = "";
       
	   
     } else if (this.value == "Set AP Channel" || this.value == "Set Sleep Time" || this.value == "Set Mode" || this.value == "Digital Read" || this.value == "Analog Read") {
       
       option1.style.display = "";
       option2.style.display = "";
       option3.style.display = "none";
       option4.style.display = "none";
       option5.style.display = "none";
       
	   
	 } else if (this.value == "Digital Write" || this.value == "Analog Write" || this.value == "SELECT") {
       
       option1.style.display = "";
       option2.style.display = "";
       option3.style.display = "";
       option4.style.display = "none";
       option5.style.display = "none";
       
		  
  if (this.value == "SELECT") {
	 
	  option1.style.display = "none";
          option2.style.display = "none";
          option3.style.display = "none";
          option4.style.display = "none";
          option5.style.display = "none";
          
	   }
     } 
  };

  // Use the onchange and onkeypress events to detect when the 
  // value of select_command has changed
  attachEvent(select_command, "change", selectHandler);
  attachEvent(select_command, "keypress", selectHandler);
});

$(document).ready(function(){
  $("form").submit(function(){
    var sentCommand = document.getElementById('result').value;
    
});
});

$(document).ready(function(){

$('.combine').on('change', function(){

if ($('#command').val() == "Set AP Channel" || "Set Sleep Time" || "Set Mode" || "Digital Read" || "Analog Read")
  { 
  var payload = $('#command').val() + '/' + $('#device').val() + '/' + $('#command1').val(); 
  }  

if ($('#command').val() == "Digital Write")
    {
    var payload = $('#command').val() + '/' + $('#device').val() + '/' + $('#command1').val() + "/" + $('#command2').val(); 
    }

if ($('#command').val() == "Neopixel")
    {
    var payload = $('#command').val() + '/' + $('#device').val() + '/' + $('#command1').val() + "/" + $('#command2').val() + '/' + $('#command3').val()  + '/' + $('#command4').val() ; 
    }
	
$('#result').val(payload); 
   });
})
</script>

<br>
<input type="text" id="result" size = "52" name="send" value="" />
<input type="submit" value="Send Command">

</form>

</body>
</html>

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