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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                

<h1>iOS7 Switch</h1>
<p>Click on the toggle switch below to see the funky animation, a la iOS7. Keep your mouse button pressed down for a second for maximum fun.</p>

<div class='listItem'>
  <span>Click me!</span>
  
  <div class='switch'>
    <div class='nub-bg'></div>
    <div class='nub'></div>
  </div>
</div>
              
            
!

CSS

              
                // ---------------------------- [ General Styles ] //

* {
  // Keeps the user from being able to drag the nub off the page.
  -webkit-user-select: none;
  -moz-user-select: none;
	user-select: none;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

body {
  font-family: "helvetica neue", "helvetica", "Open Sans", "Calibri", sans-serif;
  text-align: center;
  background-color: #efeff4;
  padding-top: 0px;
}
div.listItem {
  height: 43px;
  border-radius: 5px;
  background-color: #fff;
  width: 537px;
  margin: 0 auto;
  padding: 0 15px;
}
div.listItem span {
  float: left;
  line-height: 43px;
  font-size: 16px;
}

h1 {
  font-size: 65px;
  font-weight: 100;
  color: #157dfb;
  margin-bottom: 20px;
}
p {
  width: 537px;
  margin: 0 auto 40px;
  line-height: 21px;
}

// ---------------------------- [ Switch Styles ] //

// The main switch container.

div.switch {
  position: relative;
  top: 6px;
  float: right;
  
  width: 51px;
  height: 31px;
  border-radius: 31px;
  background-color: #e6e6e6;
  
  cursor: pointer;  
  
  -webkit-transition: 200ms background-color ease-in;
  -moz-transition:    200ms background-color ease-in;
  transition:         200ms background-color ease-in;
}
div.switch.active {
  background-color: #4cd964;
}

// The "back" part of the nub.

div.switch div.nub-bg {  
  position: absolute;
  top: 2px;
  left: 2px;
  
  width: 47px;
  height: 27px;

  border-radius: 27px;
  background-color: #fff;
  
  -webkit-transform: scale(1,1);
  -moz-transform:    scale(1,1);
  transform:         scale(1,1);
  transform-origin: center center;
  
  -webkit-transition: 200ms -webkit-transform ease-in;
  -moz-transition:    200ms -moz-transform ease-in;
  transition:         200ms transform ease-in;
}
div.switch div.nub-bg.active {
  width: 47px;
  height: 27px;
  
  -webkit-transform: scale(0,0);
  -moz-transform:    scale(0,0);
  transform:         scale(0,0);
}

// The nub.

div.switch div.nub {
  position: absolute;
  top: 2px;
  
  left: 2px;
  right: 22px;
  
  height: 27px;

  border-radius: 27px;
  background-color: #fff;
  box-shadow: 0 2px 3px rgba(0,0,0,0.5);
  
  -webkit-transition: 200ms width ease-in,
                      200ms left ease-in,
                      200ms right ease-in;
  
  -moz-transition:    200ms width ease-in,
                      200ms left ease-in,
                      200ms right ease-in;
  
  transition:         200ms width ease-in,
                      200ms left ease-in,
                      200ms right ease-in;
}
div.switch.active div.nub {
  left: 22px;
  right: 2px;
}

div.switch div.nub.wide {
  left: 2px;
  right: 14px;
}
div.switch.active div.nub.wide {
  left: 14px;
  right: 2px;
}
              
            
!

JS

              
                   
function iosSwitch() {
  this.switchContainer = document.querySelector("div.switch");
  this.nub             = document.querySelector("div.switch div.nub");
  this.nubBg           = document.querySelector("div.switch div.nub-bg");
  
  this.isActive = false;
  
  var self = this;

  function mouseDown() {
    self.nub.addClassName("wide");
    
    document.body.addEventListener("mouseup", mouseUp);
  };

  function mouseUp() {
    self.nub.removeClassName("wide");    
    self.toggleState();
    
    document.body.removeEventListener("mouseup", mouseUp);
  };

  this.switchContainer.addEventListener("mousedown", mouseDown);
};

iosSwitch.prototype.toggleState = function() {
  this.isActive = !this.isActive;
  
  this.renderState();
};

iosSwitch.prototype.renderState = function() {
  var self = this;

  switch(self.isActive) {
    case true:
      self.switchContainer.addClassName("active");
      self.nubBg.addClassName("active");
    break;
    case false:
      self.switchContainer.removeClassName("active");
      self.nubBg.removeClassName("active");
    break;
  }
};

// Support Methods

Element.prototype.addClassName = function(className) {
  if(this.className == 'undefined') {
    this.className = className;
  } else {
    var classes = this.className.split(" ");
    if(classes.indexOf(className) == -1) {
      classes.push(className);
    }
    
    this.className = classes.join(" ");
  }
  
  return this;
};

Element.prototype.removeClassName = function(className) {
  if(this.className == 'undefined')
    return;
  else {
    var classes = this.className.split(" ");
    var classNameIndex = classes.indexOf(className);
    
    if(classNameIndex == -1)
      return this;
    else {
      classes.splice(classNameIndex, 1);
      
      this.className = classes.join(" ");
    }
  }
}

// Instantite the switch.
var iosSwitch = new iosSwitch();
              
            
!
999px

Console