You Might Not Need jQuery

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jQuery and its cousins are great, and by all means use them if it makes it easier to develop your application.

If you're developing a library on the other hand, please take a moment to consider if you actually need jQuery as a dependency. Maybe you can include a few lines of utility code, and forgo the requirement. If you're only targeting more modern browsers, you might not need anything more than what the browser ships with.

At the very least, make sure you know what jQuery is doing for you[1], and what it's not. Some developers believe that jQuery is protecting us from a great demon of browser incompatibility when, in truth, post-IE8, browsers are pretty easy to deal with on their own.

Your search didn't match any comparisons.

AJAX

JSON[2]

jQuery

$.getJSON('/my/url', function(data) {

});

IE8+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onreadystatechange = function() {
  if (this.readyState === 4) {
    if (this.status >= 200 && this.status < 400) {
      // Success!
      var data = JSON.parse(this.responseText);
    } else {
      // Error :(
    }
  }
};

request.send();
request = null;

IE9+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onload = function() {
  if (request.status >= 200 && request.status < 400) {
    // Success!
    var data = JSON.parse(request.responseText);
  } else {
    // We reached our target server, but it returned an error

  }
};

request.onerror = function() {
  // There was a connection error of some sort
};

request.send();

IE10+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onload = function() {
  if (this.status >= 200 && this.status < 400) {
    // Success!
    var data = JSON.parse(this.response);
  } else {
    // We reached our target server, but it returned an error

  }
};

request.onerror = function() {
  // There was a connection error of some sort
};

request.send();

Request[3]

jQuery

$.ajax({
  type: 'GET',
  url: '/my/url',
  success: function(resp) {

  },
  error: function() {

  }
});

IE8+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onreadystatechange = function() {
  if (this.readyState === 4) {
    if (this.status >= 200 && this.status < 400) {
      // Success!
      var resp = this.responseText;
    } else {
      // Error :(
    }
  }
};

request.send();
request = null;

IE9+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onload = function() {
  if (request.status >= 200 && request.status < 400) {
    // Success!
    var resp = request.responseText;
  } else {
    // We reached our target server, but it returned an error

  }
};

request.onerror = function() {
  // There was a connection error of some sort
};

request.send();

IE10+

var request = new XMLHttpRequest();
request.open('GET', '/my/url', true);

request.onload = function() {
  if (this.status >= 200 && this.status < 400) {
    // Success!
    var resp = this.response;
  } else {
    // We reached our target server, but it returned an error

  }
};

request.onerror = function() {
  // There was a connection error of some sort
};

request.send();

Post[4]

jQuery

$.ajax({
  type: 'POST',
  url: '/my/url',
  data: data
});

IE8+

var request = new XMLHttpRequest();
request.open('POST', '/my/url', true);
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
request.send(data);

Effects

Hide[5]

IE8+

el.style.display = 'none';

Fade In[6]

IE8+

function fadeIn(el) {
  var opacity = 0;

  el.style.opacity = 0;
  el.style.filter = '';

  var last = +new Date();
  var tick = function() {
    opacity += (new Date() - last) / 400;
    el.style.opacity = opacity;
    el.style.filter = 'alpha(opacity=' + (100 * opacity)|0 + ')';

    last = +new Date();

    if (opacity < 1) {
      (window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 16);
    }
  };

  tick();
}

fadeIn(el);

IE9+

function fadeIn(el) {
  el.style.opacity = 0;

  var last = +new Date();
  var tick = function() {
    el.style.opacity = +el.style.opacity + (new Date() - last) / 400;
    last = +new Date();

    if (+el.style.opacity < 1) {
      (window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 16);
    }
  };

  tick();
}

fadeIn(el);

IE10+

el.classList.add('show');
el.classList.remove('hide');

.show {
  transition: opacity 400ms;
}
.hide {
  opacity: 0;
}

Elements

Add Class[7]

jQuery

$(el).addClass(className);

IE8+

if (el.classList)
  el.classList.add(className);
else
  el.className += ' ' + className;

IE10+

el.classList.add(className);

After[8]

IE8+

el.insertAdjacentHTML('afterend', htmlString);

Before[9]

jQuery

$(el).before(htmlString);

IE8+

el.insertAdjacentHTML('beforebegin', htmlString);

Contains[10]

IE8+

el !== child && el.contains(child);

Children[11]

IE8+

var children = [];
for (var i = el.children.length; i--;) {
  // Skip comment nodes on IE8
  if (el.children[i].nodeType != 8)
    children.unshift(el.children[i]);
}

Contains Selector[12]

jQuery

$(el).find(selector).length;

IE8+

el.querySelector(selector) !== null

Each[13]

jQuery

$(selector).each(function(i, el){

});

IE8+

function forEachElement(selector, fn) {
  var elements = document.querySelectorAll(selector);
  for (var i = 0; i < elements.length; i++)
    fn(elements[i], i);
}

forEachElement(selector, function(el, i){

});

IE9+

var elements = document.querySelectorAll(selector);
Array.prototype.forEach.call(elements, function(el, i){

});

Empty[14]

IE8+

while(el.firstChild)
  el.removeChild(el.firstChild);

Find Elements[15]

jQuery

$('.my #awesome selector');

IE8+

document.querySelectorAll('.my #awesome selector');

Filter[16]

jQuery

$(selector).filter(filterFn);

IE8+

function filter(selector, filterFn) {
  var elements = document.querySelectorAll(selector);
  var out = [];
  for (var i = elements.length; i--;) {
    if (filterFn(elements[i]))
      out.unshift(elements[i]);
  }
  return out;
}

filter(selector, filterFn);

IE9+

Array.prototype.filter.call(document.querySelectorAll(selector), filterFn);

Get Style[17]

IE8+

// Varies based on the properties being retrieved, some can be retrieved from el.currentStyle
// https://github.com/jonathantneal/Polyfills-for-IE8/blob/master/getComputedStyle.js

IE9+

getComputedStyle(el)[ruleName];

Get Height[18]

IE8+

function getHeight(el) {
    var d = /^\d+(px)?$/i;
    if (window.getComputedStyle) el = parseFloat(getComputedStyle(el, null).height.replace("px", ""));
    else {
        var c = el.currentStyle.height;
        if (d.test(c)) el = parseInt(c);
        else {
            d = el.style.left;
            var e = el.runtimeStyle.left;
            el.runtimeStyle.left = el.currentStyle.left;
            el.style.left = c || 0;
            c = el.style.pixelLeft;
            el.style.left = d;
            el.runtimeStyle.left = e;
            el = c;
        }
    }
    return el
};

getHeight(el);

IE9+

parseFloat(getComputedStyle(el, null).height.replace("px", ""))

Get Text[19]

IE8+

el.textContent || el.innerText

Has Class[20]

jQuery

$(el).hasClass(className);

IE8+

if (el.classList)
  el.classList.contains(className);
else
  new RegExp('(^| )' + className + '( |$)', 'gi').test(el.className);

IE10+

el.classList.contains(className);

Get Width[21]

IE8+

function getWidth(el) {
    var d = /^\d+(px)?$/i;
    if (window.getComputedStyle) el = parseFloat(getComputedStyle(el, null).width.replace("px", ""));
    else {
        var c = el.currentStyle.width;
        if (d.test(c)) el = parseInt(c);
        else {
            d = el.style.left;
            var e = el.runtimeStyle.left;
            el.runtimeStyle.left = el.currentStyle.left;
            el.style.left = c || 0;
            c = el.style.pixelLeft;
            el.style.left = d;
            el.runtimeStyle.left = e;
            el = c;
        }
    }
    return el
};

getWidth(el);

IE9+

parseFloat(getComputedStyle(el, null).width.replace("px", ""))

Matches Selector[22]

IE8+

var matches = function(el, selector) {
  var _matches = (el.matches || el.matchesSelector || el.msMatchesSelector || el.mozMatchesSelector || el.webkitMatchesSelector || el.oMatchesSelector);

  if (_matches) {
    return _matches.call(el, selector);
  } else {
    var nodes = el.parentNode.querySelectorAll(selector);
    for (var i = nodes.length; i--;) {
      if (nodes[i] === el)
        return true;
    }
    return false;
  }
};

matches(el, '.my-class');

IE9+

var matches = function(el, selector) {
  return (el.matches || el.matchesSelector || el.msMatchesSelector || el.mozMatchesSelector || el.webkitMatchesSelector || el.oMatchesSelector).call(el, selector);
};

matches(el, '.my-class');

Offset[24]

IE8+

var rect = el.getBoundingClientRect();

{
  top: rect.top + document.body.scrollTop,
  left: rect.left + document.body.scrollLeft
}

Outer Height With Margin[25]

IE8+

function outerHeight(el) {
  var height = el.offsetHeight;
  var style = el.currentStyle || getComputedStyle(el);

  height += parseInt(style.marginTop) + parseInt(style.marginBottom);
  return height;
}

outerHeight(el);

IE9+

function outerHeight(el) {
  var height = el.offsetHeight;
  var style = getComputedStyle(el);

  height += parseInt(style.marginTop) + parseInt(style.marginBottom);
  return height;
}

outerHeight(el);

Outer Width With Margin[26]

IE8+

function outerWidth(el) {
  var width = el.offsetWidth;
  var style = el.currentStyle || getComputedStyle(el);

  width += parseInt(style.marginLeft) + parseInt(style.marginRight);
  return width;
}

outerWidth(el);

IE9+

function outerWidth(el) {
  var width = el.offsetWidth;
  var style = getComputedStyle(el);

  width += parseInt(style.marginLeft) + parseInt(style.marginRight);
  return width;
}

outerWidth(el);

Position[27]

IE8+

{left: el.offsetLeft, top: el.offsetTop}

Prepend[28]

IE8+

parent.insertBefore(el, parent.firstChild);

Position Relative To Viewport[29]

jQuery

var offset = el.offset();

{
  top: offset.top - document.body.scrollTop,
  left: offset.left - document.body.scrollLeft
}

IE8+

el.getBoundingClientRect()

Remove[31]

IE8+

el.parentNode.removeChild(el);

Remove Class[32]

jQuery

$(el).removeClass(className);

IE8+

if (el.classList)
  el.classList.remove(className);
else
  el.className = el.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ');

IE10+

el.classList.remove(className);

Remove Attributes[33]

jQuery

$(el).removeAttr('tabindex');

IE8+

el.removeAttribute('tabindex');

Set Attributes[34]

jQuery

$(el).attr('tabindex', 3);

IE8+

el.setAttribute('tabindex', 3);

Set Style[35]

jQuery

$(el).css('border-width', '20px');

IE8+

// Use a class if possible
el.style.borderWidth = '20px';

Set Text[36]

IE8+

if (el.textContent !== undefined)
  el.textContent = string;
else
  el.innerText = string;

Set Height[37]

IE8+

function setHeight(el, val) {
    if (typeof val === "function") val = val();
    if (typeof val === "string") el.style.height = val;
    else el.style.height = val + "px";
}

setHeight(el, val);

Siblings[38]

IE8+

var siblings = Array.prototype.slice.call(el.parentNode.children);

for (var i = siblings.length; i--;) {
  if (siblings[i] === el) {
    siblings.splice(i, 1);
    break;
  }
}

IE9+

Array.prototype.filter.call(el.parentNode.children, function(child){
  return child !== el;
});

Set Width[39]

IE8+

function setHeight(el, val) {
    if (typeof val === "function") val = val();
    if (typeof val === "string") el.style.height = val;
    else el.style.height = val + "px";
}

setHeight(el, val);

Toggle Class[40]

jQuery

$(el).toggleClass(className);

IE8+

if (el.classList) {
  el.classList.toggle(className);
} else {
    var classes = el.className.split(' ');
    var existingIndex = -1;
    for (var i = classes.length; i--;) {
      if (classes[i] === className)
        existingIndex = i;
    }

    if (existingIndex >= 0)
      classes.splice(existingIndex, 1);
    else
      classes.push(className);

  el.className = classes.join(' ');
}

IE9+

if (el.classList) {
  el.classList.toggle(className);
} else {
  var classes = el.className.split(' ');
  var existingIndex = classes.indexOf(className);

  if (existingIndex >= 0)
    classes.splice(existingIndex, 1);
  else
    classes.push(className);

  el.className = classes.join(' ');
}

IE10+

el.classList.toggle(className);

Events

Off[41]

jQuery

$(el).off(eventName, eventHandler);

IE8+

function removeEventListener(el, eventName, handler) {
  if (el.removeEventListener)
    el.removeEventListener(eventName, handler);
  else
    el.detachEvent('on' + eventName, handler);
}

removeEventListener(el, eventName, handler);

IE9+

el.removeEventListener(eventName, eventHandler);

On

jQuery

$(el).on(eventName, eventHandler);

IE8+

function addEventListener(el, eventName, handler) {
  if (el.addEventListener) {
    el.addEventListener(eventName, handler);
  } else {
    el.attachEvent('on' + eventName, function(){
      handler.call(el);
    });
  }
}

addEventListener(el, eventName, handler);

IE9+

el.addEventListener(eventName, eventHandler);

Trigger Native[42]

IE8+

if (document.createEvent) {
  var event = document.createEvent('HTMLEvents');
  event.initEvent('change', true, false);
  el.dispatchEvent(event);
} else {
  el.fireEvent('onchange');
}

IE9+

// For a full list of event types: https://developer.mozilla.org/en-US/docs/Web/API/document.createEvent
var event = document.createEvent('HTMLEvents');
event.initEvent('change', true, false);
el.dispatchEvent(event);

Trigger Custom[43]

jQuery

$(el).trigger('my-event', {some: 'data'});

IE8+

// Custom events are not natively supported, so you have to hijack a random
// event.
//
// Just use jQuery.

IE9+

if (window.CustomEvent) {
  var event = new CustomEvent('my-event', {detail: {some: 'data'}});
} else {
  var event = document.createEvent('CustomEvent');
  event.initCustomEvent('my-event', true, true, {some: 'data'});
}

el.dispatchEvent(event);

Ready[44]

jQuery

$(document).ready(function(){

});

IE8+

function ready(fn) {
  if (document.readyState != 'loading'){
    fn();
  } else if (document.addEventListener) {
    document.addEventListener('DOMContentLoaded', fn);
  } else {
    document.attachEvent('onreadystatechange', function() {
      if (document.readyState != 'loading')
        fn();
    });
  }
}

IE9+

function ready(fn) {
  if (document.readyState != 'loading'){
    fn();
  } else {
    document.addEventListener('DOMContentLoaded', fn);
  }
}

Utils

Bind[45]

IE8+

fn.apply(context, arguments);

Deep Extend[46]

jQuery

$.extend(true, {}, objA, objB);

IE8+

var deepExtend = function(out) {
  out = out || {};

  for (var i = 1; i < arguments.length; i++) {
    var obj = arguments[i];

    if (!obj)
      continue;

    for (var key in obj) {
      if (obj.hasOwnProperty(key)) {
        if (typeof obj[key] === 'object')
          out[key] = deepExtend(out[key], obj[key]);
        else
          out[key] = obj[key];
      }
    }
  }

  return out;
};

deepExtend({}, objA, objB);

Array Each[47]

jQuery

$.each(array, function(i, item){

});

IE8+

function forEach(array, fn) {
  for (var i = 0; i < array.length; i++)
    fn(array[i], i);
}

forEach(array, function(item, i){

});

IE9+

array.forEach(function(item, i){

});

Index Of[48]

IE8+

function indexOf(array, item) {
  for (var i = 0; i < array.length; i++) {
    if (array[i] === item)
      return i;
  }
  return -1;
}

indexOf(array, item);

Is Array[49]

IE8+

isArray = Array.isArray || function(arr) {
  return Object.prototype.toString.call(arr) == '[object Array]';
};

isArray(arr);

Extend[50]

jQuery

$.extend({}, objA, objB);

IE8+

var extend = function(out) {
  out = out || {};

  for (var i = 1; i < arguments.length; i++) {
    if (!arguments[i])
      continue;

    for (var key in arguments[i]) {
      if (arguments[i].hasOwnProperty(key))
        out[key] = arguments[i][key];
    }
  }

  return out;
};

extend({}, objA, objB);

Map[51]

jQuery

$.map(array, function(value, index){

});

IE8+

function map(arr, fn) {
  var results = [];
  for (var i = 0; i < arr.length; i++)
    results.push(fn(arr[i], i));
  return results;
}

map(array, function(value, index){

});

IE9+

array.map(function(value, index){

});

Parse Html[52]

IE8+

var parseHTML = function(str) {
  var el = document.createElement('div');
  el.innerHTML = str;
  return el.children;
};

parseHTML(htmlString);

IE9+

var parseHTML = function(str) {
  var tmp = document.implementation.createHTMLDocument();
  tmp.body.innerHTML = str;
  return tmp.body.children;
};

parseHTML(htmlString);

Trim[53]

IE8+

string.replace(/^\s+|\s+$/g, '');

Type[54]

IE8+

Object.prototype.toString.call(obj).replace(/^\[object (.+)\]$/, '$1').toLowerCase();
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This is my test area for webdev. I keep a collection of code here, mostly for my reference. Also if i find a good link, i usually add it here and then forget about it. more...

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🪦 2000 - 16 Oct 2022 - Boots
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@viewport

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
min-zoom (@viewport) css reference