QuickRef.ME

jQuery

This jQuery cheat sheet is a great reference for both beginners and experienced developers.

#Getting started

#Including jQuery

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

#Official CDN

<script src="https://code.jquery.com/jquery-3.5.1.min.js" crossorigin="anonymous"></script>

#jQuery syntax


$(selector).methodOrFunction();

#Example:

$('#menu').on('click', () =>{
  $(this).hide();  
});

$("body").css("background", "red");

#jQuery document ready


$(document).ready(function() {
  // Runs after the DOM is loaded.
  alert('DOM fully loaded!');
});
$(function(){
  // Runs after the DOM is loaded.
  alert('DOM fully loaded!');
});

#Attributes

#Examples

$('h2').css({
  color: 'blue',
  backgroundColor: 'gray',
  fontSize: '24px'
});

#jQuery addClass

$('.button').addClass('active'); 

#jQuery removeClass

$('.button').on('mouseleave', evt => {
   let e = evt.currentTarget;
   $(e).removeClass('active');
});

#jQuery .toggleClass

$('.choice').toggleClass('highlighted');

#Manipulation

#Examples

/*<span>Span.</span>*/
$('span').after('<p>Paragraph.</p>');
/*<span>Span.</span><p>Paragraph.</p>*/

/*<span>Span.</span>*/
$('<span>Span.</span>').replaceAll('p');
/*<p>Span.</p>*/

/*<span>This is span.</span>*/
$('span').wrap('<p></p>');
/*<p><span>This is span.</span></p>*/

#Copying

#DOM Insertion, Around

#DOM Replacement

#Events

#Examples

// A mouse event 'click'
$('#menu-button').on('click', () => {
  $('#menu').show();
});

// A keyboard event 'keyup'
$('#textbox').on('keyup', () => {
  $('#menu').show();
});

// A scroll event 'scroll'
$('#menu-button').on('scroll', () => {
  $('#menu').show();
});

#Event object

$('#menu').on('click', event => {
  $(event.currentTarget).hide();
});

#Method chaining

$('#menu-btn').on('mouseenter', () => {
  $('#menu').show();
}).on('mouseleave', () => {
  $('#menu').hide();
});

#Prevents the event

$( "p" ).click(function( event ) {
  event.stopPropagation();
  // Do something
});

#Browser Events

#Document Loading

#Keyboard Events

#Effects

#Examples

$('#menu-button').on('click', () => {
  // $('#menu').fadeIn(400, 'swing')
  $('#menu').fadeIn();
});

#fadeOut effect

$('#menu-button').on('click', () => {
  // $('#menu').fadeOut(400, 'swing')
  $('#menu').fadeOut();
});

#Ajax

#Examples

$.ajax({
  url: this.action,
  type: this.method,
  data: $(this).serialize()
}).done(function(server_data){
  console.log("success" + server_data);
}).fail(function(jqXHR, status, err){
  console.log("fail" + err);
});