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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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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.

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Insecure Resource

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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).

Add External Stylesheets/Pens

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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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HTML 

              
                <div class="wrapper overflow:hidden">
  <section class="h:100vh bg:pink flex jc:center ai:center">
    <div class="fade-up">
      Lorem ipsum dolor sit amet consectetur adipisicing elit. Reprehenderit a perspiciatis consectetur vitae quisquam repellat velit nemo architecto, quos provident excepturi enim voluptatem sapiente dolore sed maxime quo incidunt exercitationem!
    </div>
  </section>
  <section class="sec-1 rel
bg:url(https://img.freepik.com/free-photo/abstract-grunge-decorative-relief-navy-blue-stucco-wall-texture-wide-angle-rough-colored-background_1258-28311.jpg?w=2000) bg:fixed
" 
style="background-attachment: fixed">
    <div class="container">
        <div class="row">
            <div class="col-lg-6 min-h:900@width1200 rel sec-1-pic fade-left">
                <figure class="">
                    <img class="max-w:100%" src="https://3.bp.blogspot.com/-GCRwg01rCtE/V_sXreCYGOI/AAAAAAAApOo/R4WTsVrHN-wBPenCcPYifUQ2GNyyJR4WQCLcB/s1600/1.png" alt="">
                </figure>
            </div>
            <div class="col-lg-6 sec-1-text fade-up">
                <div class="pt:3em@width1200">
                    <h3 class="color:var(--light-blue-color)!">Low-power Mini-ITX Motherboard for IoT Edge Computing</h3>
                    <p class="color:white!">
                        The KINO-EHL-J6412 Mini-ITX motherboard features reliable performance,
                        advanced network connectivity and rich I/O capabilities in a
                        compact board that fits small chassis size for space-critical in stallation
                        like kiosk, POS or digital signage. The motherboard supports up
                        to 3 display outputs, 8 USB ports and 6 COM ports for a wide range
                        of peripheral connections. Dual 2.5GbE and 5G & Wi-Fi expandability
                        are available to provide high-bandwidth data transmission. Its flexible
                        customization options and low power advantages make it the ideal
                        choice for IoT edge applications, which require economic solution
                        with high scalability and reliability.
                    </p>
                </div>
            </div>
        </div>
    </div>
</section>
  <section class="sec-3 pt:3em">
      <div class="container">
          <div class="row">
              <div class="col-12">
                  <h3 class="t:center">Title</h3>
                  <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Et cumque perferendis neque maiores, dolore, voluptates nisi, nostrum dolores dolorum obcaecati minus. Officia nobis, fugiat porro nulla consequuntur eos repudiandae autem.
                  </p>
                  <div class="scroll-trigger flex">
                      <div class="scroll-trigger-item w:full">
                          <div class="mx:auto w:80% flex">
                              <div>
                                  <h4>Long-term Support</h4>
                                  <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                      period. This long-term availability makes the Mini-ITX motherboard an
                                      ideal solution for integrators looking to maximize their return on investment.
                                  </p>
                              </div>
                              <figure>
                                  <img src="../_img/fake.png" alt="">
                              </figure>
                          </div>
                      </div>
                      <div class="scroll-trigger-item w:full">
                          <div class="mx:auto w:80% flex">
                              <div>
                                  <h4>Long-term Support</h4>
                                  <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                      period. This long-term availability makes the Mini-ITX motherboard an
                                      ideal solution for integrators looking to maximize their return on investment.
                                  </p>
                              </div>
                              <figure>
                                  <img src="../_img/fake.png" alt="">
                              </figure>
                          </div>
                      </div>
                                                                <div class="scroll-trigger-item w:full">
                                    <div class="mx:auto w:80%">
                                        <h4>CPU Benchmark</h4>
                                        <figure>
                                            <img src="../_img/fake.png" class="max-w:30%" alt="">
                                            <small>Source:<a target="_blank" href="www.cpubenchmark.net">www.cpubenchmark.net</a></small>
                                        </figure>
                                    </div>
                                </div>
                                <div class=" scroll-trigger-item w:full">
                                    <div class="mx:auto w:80% flex flex:column flex:row@width1200">
                                        <div>
                                            <h4>Long-term Support</h4>
                                            <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                                period. This long-term availability makes the Mini-ITX motherboard an
                                                ideal solution for integrators looking to maximize their return on investment.
                                            </p>
                                        </div>
                                        <figure>
                                            <img class="max-w:80% h:80" src="../_img/fake.png" alt="">
                                        </figure>
                                    </div>
                                </div>
                                <div class=" scroll-trigger-item w:full">
                                    <div class="mx:auto w:80% flex flex:column flex:row@width1200">
                                        <div>
                                            <h4>Long-term Support</h4>
                                            <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                                period. This long-term availability makes the Mini-ITX motherboard an
                                                ideal solution for integrators looking to maximize their return on investment.
                                            </p>
                                        </div>
                                        <figure>
                                            <img class="max-w:80% h:80" src="../_img/fake.png" alt="">
                                        </figure>
                                    </div>
                                </div>
                                                    <div class="scroll-trigger-item w:full">
                                    <div class="mx:auto w:80%">
                                        <h4>CPU Benchmark</h4>
                                        <figure>
                                            <img src="../_img/fake.png" class="max-w:30%" alt="">
                                            <small>Source:<a target="_blank" href="www.cpubenchmark.net">www.cpubenchmark.net</a></small>
                                        </figure>
                                    </div>
                                </div>
                                <div class=" scroll-trigger-item w:full">
                                    <div class="mx:auto w:80% flex flex:column flex:row@width1200">
                                        <div>
                                            <h4>Long-term Support</h4>
                                            <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                                period. This long-term availability makes the Mini-ITX motherboard an
                                                ideal solution for integrators looking to maximize their return on investment.
                                            </p>
                                        </div>
                                        <figure>
                                            <img class="max-w:80% h:80" src="../_img/fake.png" alt="">
                                        </figure>
                                    </div>
                                </div>
                                                    <div class="scroll-trigger-item w:full">
                                    <div class="mx:auto w:80%">
                                        <h4>CPU Benchmark</h4>
                                        <figure>
                                            <img src="../_img/fake.png" class="max-w:30%" alt="">
                                            <small>Source:<a target="_blank" href="www.cpubenchmark.net">www.cpubenchmark.net</a></small>
                                        </figure>
                                    </div>
                                </div>
                                <div class=" scroll-trigger-item w:full">
                                    <div class="mx:auto w:80% flex flex:column flex:row@width1200">
                                        <div>
                                            <h4>Long-term Support</h4>
                                            <p>The Intel® Celeron® J6412 processor is available and supported for an extended
                                                period. This long-term availability makes the Mini-ITX motherboard an
                                                ideal solution for integrators looking to maximize their return on investment.
                                            </p>
                                        </div>
                                        <figure>
                                            <img class="max-w:80% h:80" src="../_img/fake.png" alt="">
                                        </figure>
                                    </div>
                                </div>
                  </div>
              </div>
          </div>
      </div>
  </section>
</div>
!

CSS
!

JS 

              
                console.clear();

/////////// css setting doesn't matter ////////
window.MasterCSSManual = true;
let Style = window.MasterStyle;
Style.extend('classes', {
    customContainer: 'margin:0|auto px:1em {px:0em;max-w:540px}@bsSm max-w:690px@width768 max-w:960px@width992 max-w:1140px@width1200 max-w:1280px@width1440',
    customRow: 'flex flex:wrap'
})
Style.extend('breakpoints', {
    bsSm: '576px',
    width768: '768px',
    width992: '992px',
    width1024: '1024px',
    width1200: '1200px',
    width1280: '1280px',
    width1440: '1440px',
    width1920: '1920px',
    width2560: '2560px',
});
window.initMasterCSS();
/////////// css setting doesn't matter ////////

gsap.registerPlugin(ScrollTrigger);

const gsapSimpleAnimation = (className, config, tl = gsap) => {
  const animateEl = gsap.utils.toArray(className);
  animateEl.forEach(item => {
    tl.from(item,{
      ...config,
      duration: item.dataset.duration || 0.7,
      delay: item.dataset.delay || null,
      scrollTrigger: {
        trigger: item,
        start: () => item.dataset.start || "-10% center",
        end: () => {
          if(item.dataset.end) item.dataset.end
          else "+=" + item.offsetWidth
        },
        toggleActions: 'restart none restart reverse',
        pinnedContainer: ".feature-sec .wrapper", 
        refreshPriority: -1 
      }
    })
  })
}
gsapSimpleAnimation('.fade-up',{ yPercent: 10, opacity: 0 })
gsapSimpleAnimation('.fade-left',{ xPercent: -10, opacity: 0 })


// section-3 animation
//////// comment out background-attachment will work //////////////
const items = gsap.utils.toArray(".scroll-trigger-item");
const scrollTriggerContainer = document.querySelector('.scroll-trigger');
scrollTriggerContainer.style.width = `${items.length*100}%`

gsap.to(items, {
  xPercent: (items.length - 1) * -100,
  scrollTrigger: {
    trigger: '.sec-3',
    pin: '.wrapper',
    scrub: 1,
    start: 'top top',
    end: () => "+=" + (items[0].offsetHeight * (items.length)),
    markers: true,
  },
});
//////////// comment out background-attachment will work ///////////
!
999px

Console