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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>

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CSS

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CSS Base

About CSS Base

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JavaScript

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HTML 

              
                <div id="box"></div>
<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 22.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
<div id="svgCont">
<svg version="1.1" id="masterGroup" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px"
	 y="0px" viewBox="0 0 1024 768" enable-background="new 0 0 1024 768" xml:space="preserve" id="svgMain">
<g id="desktop">
	<g>
		<polygon fill="#363636" points="567,508 567,527 513,527 513,508 530,508 530,473 549,473 549,508 		"/>
	</g>
	<g>
		<path fill="#616161" d="M678,477H402c-6.1,0-11-4.9-11-11V308c0-6.1,4.9-11,11-11h276c6.1,0,11,4.9,11,11v158
			C689,472.1,684.1,477,678,477z"/>
	</g>
	<g>
		<rect x="406" y="312" fill="#FFFFFF" width="268" height="151"/>
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	<circle fill="none" stroke="#363636" stroke-miterlimit="10" cx="599" cy="412" r="11"/>
	<g>
		<path id="desktopSignature" fill="none" stroke="#363636" stroke-width="2" stroke-miterlimit="10" d="M474,449.1c0,0,2.8-5.7,2.8-7.1
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	<g>
		
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			<line class="desktopFormContent" fill="none" stroke="#363636" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="478" y1="356" x2="522" y2="356"/>
		
			<line class="desktopFormContent" fill="none" stroke="#363636" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="558" y1="356" x2="602" y2="356"/>
		
			<line class="desktopFormContent" fill="none" stroke="#363636" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="478" y1="412" x2="570" y2="412"/>
	</g>
	<g>
		<path id="desktopTick" fill="none" stroke="#363636" stroke-width="2" stroke-linejoin="round" stroke-miterlimit="10" d="M593,412c0,0,5,1,6,5
			c0,0,2-13,12-18"/>
	</g>
</g>
<g id="Tablet">
	<g>
		<path fill="#616161" d="M243.4,460.1h-99.4c-1.4,0-2.6-1.1-2.6-2.6V333.1c0-1.4,1.1-2.6,2.6-2.6h99.4c1.4,0,2.6,1.1,2.6,2.6v124.5
			C246,458.9,244.9,460.1,243.4,460.1z"/>
	</g>
	<g>
		<rect x="145.7" y="340.5" fill="#FFFFFF" width="96.1" height="109.5"/>
	</g>
	<g id="tabletFormContent">
		
			<line fill="none" stroke="#363636" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="159" y1="357" x2="229" y2="357"/>
		
			<line fill="none" stroke="#363636" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="159" y1="390" x2="229" y2="390"/>
		
			<line fill="none" stroke="#363636" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="159" y1="406" x2="209" y2="406"/>
		
			<line fill="none" stroke="#363636" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="158" y1="373" x2="182" y2="373"/>
		
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		<circle fill="none" stroke="#363636" stroke-width="0.75" stroke-miterlimit="10" cx="228.5" cy="406.4" r="6.5"/>
		<path fill="none" stroke="#363636" stroke-miterlimit="10" d="M156,434.8c0,0,1.8-3.6,1.8-4.6c0-0.9,2.3,2.3,2.3,3.2
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			c7.8,5.9,6.8,6.8,8.7,2.7c1.8-4.1-3.6-7.3,2.7-4.1c6.4,3.2-4.1,1.8,6.8,3.2c10.9,1.4,7.3,2.7,10.9,0.9"/>
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	</g>
	<g>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="224" y1="319" x2="228" y2="292"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="190" y1="317" x2="189" y2="291"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="157" y1="320" x2="149" y2="294"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="129" y1="327" x2="110" y2="314"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="124" y1="353" x2="99" y2="352"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="126" y1="387" x2="105" y2="390"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="125" y1="415" x2="99" y2="426"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="126" y1="448" x2="98" y2="463"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="134" y1="468" x2="127" y2="483"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="163" y1="476" x2="163" y2="496"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="195" y1="477" x2="198" y2="500"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="235" y1="479" x2="242" y2="502"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="255" y1="470" x2="285" y2="482"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="260" y1="443" x2="289" y2="452"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="258" y1="415" x2="279" y2="415"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="258" y1="385" x2="284" y2="383"/>
		
			<line class="tabletDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="257" y1="353" x2="281" y2="341"/>
	</g>
</g>
<g>
	<path id="rightJump" fill="none" stroke="#FF7700" stroke-width="6" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" d="M693,286c0,0,103-59,137,42
		"/>
</g>
<g>
	<path id="leftJump" fill="none" stroke="#FF7700" stroke-width="6" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" d="M382,286c0,0-73-38-125,31"
		/>
</g>
<g id="smartphone">
	<g>
		<path fill="#616161" d="M873.3,412.5h-37.5c-1,0-1.7-0.8-1.7-1.7v-63.5c0-1,0.8-1.7,1.7-1.7h37.5c1,0,1.7,0.8,1.7,1.7v63.5
			C875,411.7,874.2,412.5,873.3,412.5z"/>
	</g>
	<g>
		<rect x="836.5" y="350.5" fill="#FFFFFF" width="36" height="57"/>
	</g>
	<g id="smartphoneFormContent">
		
			<line fill="none" stroke="#363636" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="841.4" y1="358" x2="868.3" y2="358"/>
		
			<line fill="none" stroke="#363636" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="841.4" y1="376.7" x2="868.3" y2="376.7"/>
		
			<line fill="none" stroke="#363636" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="841.4" y1="384.9" x2="860.6" y2="384.9"/>
		
			<line fill="none" stroke="#363636" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" x1="841" y1="368.2" x2="850.2" y2="368.2"/>
		
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		<rect x="838.5" y="355.6" fill="none" stroke="#363636" stroke-width="0.25" stroke-miterlimit="10" width="32.3" height="5.2"/>
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		<rect x="856.6" y="366.1" fill="none" stroke="#363636" stroke-width="0.25" stroke-miterlimit="10" width="14.2" height="4.5"/>
		<circle fill="none" stroke="#363636" stroke-width="0.25" stroke-miterlimit="10" cx="868.1" cy="385" r="2.5"/>
		<path fill="none" stroke="#363636" stroke-width="0.5" stroke-miterlimit="10" d="M840.2,399c0,0,0.7-1.4,0.7-1.8
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	<g>
		
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			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="888" y1="396" x2="907" y2="398"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="882" y1="423" x2="896" y2="439"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="856" y1="426" x2="857" y2="442"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="834" y1="427" x2="826" y2="446"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="823" y1="412" x2="803" y2="422"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="820" y1="387" x2="793" y2="390"/>
		
			<line class="smartphoneDing" fill="none" stroke="#3E70FF" stroke-width="4" stroke-linecap="round" stroke-miterlimit="10" x1="826" y1="361" x2="793" y2="354"/>
	</g>
</g>
</svg>
</div>
!

CSS 

              
                svg{
  display:block;
  width:50%;
  margin:0 auto;
}

#box {
  height: 1000px;
  background-color: red;
}
!

JS 

              
                window.onload = function() {  

  TweenLite.set(["#desktopTick", ".desktopFormContent", "#desktopSignature", "#leftJump", "#rightJump", ".tabletDing", ".smartphoneDing"], {drawSVG:0});
  TweenLite.set(["#tabletFormContent", "#smartphoneFormContent"], {opacity:0});

  function swpAnimate() {
    var tl = new TimelineLite();
    
    tl.to(".desktopFormContent", 0.8, {drawSVG:"5% 95%"}, "+=1")  
      .to("#desktopTick", 0.8, {drawSVG:"5% 95%"})
      .to("#desktopSignature", 1.2, {drawSVG:"5% 95%"})
      .to(["#leftJump", "#rightJump"], 1, {drawSVG:"5% 95%",ease:Back.easeOut.config(2)})
      .to(["#tabletFormContent", "#smartphoneFormContent"], 0.8, {opacity:1}, "-=0.5")
      .to([".tabletDing", ".smartphoneDing"], 0.2, {drawSVG:"5% 95%",  ease: Circ. easeOut}, "-=1")
      .to([".tabletDing", ".smartphoneDing"], 0.2, {drawSVG:0, opacity:0,  ease: Circ. easeOut});

  }

  jQuery.prototype.isInViewport = function() {
    var elementTop = jQuery(this).offset().top;
    var elementBottom = elementTop + jQuery(this).outerHeight();

    var viewportTop = jQuery(window).scrollTop();
    var viewportBottom = viewportTop + jQuery(window).height();

    return elementBottom > viewportTop && elementTop < viewportBottom;
  };

  window.onscroll = function() {
    jQuery('#svgCont').each(function() {
      if (jQuery(this).isInViewport()) {
        swpAnimate();        
      }
    });
  };

};
!
999px

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