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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                <button onclick="do1();">Move 1</button><br/>
<button onclick="do2();">Move 2</button><br/>
<button onclick="do3();">Move 3</button><br/>
<button onclick="do4();">Move 4</button><br/>
<button onclick="do5();">Move 5</button><br/>
<button onclick="do6();">Move 6</button><br/>
<button onclick="do7();">Move 7</button><br/>
<button onclick="do8();">Move 8</button><br/>
<svg id="elSVG" viewBox="0 0 420 620" preserveAspectRatio="xMinYMin meet">
   <rect id="rect1" x="23" y="10" width="50" height="50" fill="#0000cc" />
   <rect id="rect2" x="360" y="230" width="50" height="50" fill="#00cc00" />
   <rect id="rect3" x="143" y="412" width="50" height="50" fill="#cc0000" />  
</svg>
<div id="div1"></div>
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
<div id="divLine"></div>
<div id="divSquare"></div>
!

CSS 

              
                @charset "utf-8";	
	*{box-sizing: border-box;}

	#elSVG
	{
	  position: absolute;
	  left:25%;
	  top:15%;
	  width:22%;
	  height:50%;    
	  outline: 2px solid red;
    
    overflow: visible;
	}
	
	#div1 /*red*/
	{
		position:absolute;
		left:32%;
		top:85%;
		width:6px;		
		height:6px;
		border: solid 2px #CC0000;
		border-radius:50%;
		background-color:#FF6666;
		background-opacity:.3;
	}
	
	#div2  /*blue*/
	{
		position:absolute;
		left:67%;
		top:15%;
		width:6px;		
		height:6px;
		border: solid 2px #0033FF;
		border-radius:50%;
		background-color:#33CCFF;
		background-opacity:.3;
	}
	
	#div3  /*green*/
	{
		position:absolute;
		left:48%;
		top:41%;
		width:6px;		
		height:6px;
		border: solid 2px #336600;
		border-radius:50%;
		background-color: #66FFCC;
		background-opacity:.3;
	}
	
	#div4  /*orange*/
	{
		position:absolute;
		left:52%;
		top:71%;
		width:6px;		
		height:6px;
		border: solid 2px #FF9933;
		border-radius:50%;
		background-color:#FFCCCC;
		background-opacity:.3;
	}
	
	#divLine
	{
		position:absolute;
    display:none;
		left:326px;
		top:5%;
		width:4px;
		height:90%;
		background-color:#000000;
	}
	
	#divSquare
	{
		position:absolute;
    display:none;
		left:326px;
		top:100%;px;
		width:50px;
		height:50px;
		background-color:#000000;
	}
!

JS 

              
                // Polyfill for getTransformToElement
SVGElement.prototype.getTransformToElement = SVGElement.prototype.getTransformToElement || function(toElement) {
  return toElement.getScreenCTM().inverse().multiply(this.getScreenCTM());  
};

var svg = null;
var rect1 = null;
var rect2 = null;
var rect3 = null;
var dot1 = null;
var dot2 = null;

$(function()
{
	console.clear();  
});

function do1()
{
	//move svg so top left is at blue dot center
  console.clear();
  var elSVG = document.querySelector("#elSVG");
  var rectDot = document.querySelector("#div2").getBoundingClientRect();
  var rectSVG = elSVG.getBoundingClientRect();
  elSVG.style.left = (rectDot.left + (rectDot.width/2)) + "px";
  elSVG.style.top = (rectDot.top + (rectDot.height/2)) + "px";
  
}

function do2()
{
  //move svg so bottom right is at orange dot center
  var elSVG = document.querySelector("#elSVG");
  var rectDot = document.querySelector("#div4").getBoundingClientRect();
 
  elSVG.style.left = rectDot.left + (rectDot.width/2) + "px";
  elSVG.style.top = rectDot.top + (rectDot.height/2) + "px"; 
}

function do3()
{
  //Move svg so green square top left is at green dot center
  var elSVG = document.querySelector("#elSVG");
  var rectSVG = elSVG.getBoundingClientRect();
  var rectDot = document.querySelector("#div3").getBoundingClientRect();
  var rectSq = document.querySelector("#rect2").getBoundingClientRect();
  
  DotX = rectDot.left + (rectDot.width/2);
  DotY = rectDot.top + (rectDot.height/2);
  SqX = rectSq.left - rectSVG.left;
  SqY = rectSq.top - rectSVG.top;
  
  elSVG.style.left = DotX - SqX + "px";
  elSVG.style.top = DotY - SqY + "px";	
}

function do4()
{
	//Move svg so red square bottom right is at red dot center.
  //This doesn't always work exactly (given different screen sizes).
  var elSVG = document.querySelector("#elSVG");
  var rectSVG = elSVG.getBoundingClientRect();  
  var rectDot = document.querySelector("#div1").getBoundingClientRect();   
  var rectSq = document.querySelector("#rect3").getBoundingClientRect();
 
  var DotX = rectDot.left + (rectDot.width/2);
  var DotY = rectDot.top + (rectDot.height/2);
  var SqX = (rectSq.left + rectSq.width) - rectSVG.left;
  var SqY = (rectSq.top + rectSq.height) - rectSVG.top;
   
  elSVG.style.left = DotX - SqX + "px";
  elSVG.style.top = DotY - SqY + "px";  
}

function do5()
{
	//Move orange dot so center is on red square right bottom
  
  var elDot = document.querySelector("#div4");
  var rectDot = elDot.getBoundingClientRect();
  var rectSq = document.querySelector("#rect3").getBoundingClientRect();
  
 
  var sqX = rectSq.left + rectSq.width;
  var sqY = rectSq.top + rectSq.height;
  
  elDot.style.left = (sqX - (rectDot.width/2)) + "px";
  elDot.style.top = (sqY - (rectDot.height/2)) + "px";
  
}

function do6() {
  
  var svg = document.querySelector("#elSVG");
  var box = document.querySelector("#rect2");
  var div = document.querySelector("#div2");
    
  var svgBounds = svg.getBoundingClientRect();
  var boxBounds = box.getBoundingClientRect();
  var divBounds = div.getBoundingClientRect();
  
  var p1 = svg.createSVGPoint();
  var p2 = svg.createSVGPoint();
  
  p1.x = (divBounds.left + divBounds.width / 2) - svgBounds.left;
  p1.y = (divBounds.top + divBounds.height / 2) - svgBounds.top;
  
  p2.x = boxBounds.left - svgBounds.left;
  p2.y = boxBounds.top - svgBounds.top;
  
  var local1 = toLocalPoint(box, p1);
  var local2 = toLocalPoint(box, p2);
  
  var x = local1.x - local2.x;
  var y = local1.y - local2.y;
  
  TweenLite.to(box, 0.4, {
    x: "+=" + x,
    y: "+=" + y 
  });
}

function toLocalPoint(element, point) {
  
  var svg = element.ownerSVGElement;
  var globalPoint = point.matrixTransform(svg.getScreenCTM().inverse());
  var globalToLocalMatrix = element.getTransformToElement(svg).inverse();
  return globalPoint.matrixTransform(globalToLocalMatrix);
}

// function do6()
// {
// 	//Without moving svg, move green square so that top left is at blue dot center
//   var elSVG = document.querySelector("#elSVG");
//   var elSq = document.querySelector("#rect2");
//   var rectDot = document.querySelector("#div2");
// 	var point = elSVG.createSVGPoint();
//   var pntSq = point.matrixTransform(elSq.getScreenCTM().inverse());  
//   //Oh no, what now? I'm getting negative numbers for x & y.
// }

function do7()
{
	//Without moving the SVG, move the red square so the bottom right is center of orange dot	
  	
}

function do8()
{

}

function do9()
{

}
!
999px

Console