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HTML

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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-.

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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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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <div class="hero">
    <h1> Image Sequence Animation</h1>
</div>
<div class="hero">
    <h1> Image Sequence Animation</h1>
</div>
<div class="hero">
    <h1> Image Sequence Animation</h1>
</div>

<section class="hero-sequence-wrapper">
    <div class="container-fluid px-0 set-height">
        <div class="hero-sequence">
            <div class="sequence-element sticky-element">
                <!-- onclick it will popup a video -->
                <div class="sequence-youtube-icon " data-toggle="modal" data-target="#sequence-video">
                    <img alt="" class="" src="">
                </div>
                <canvas width="1920" height="400"></canvas>
            </div>
        </div>
    </div>
</section>

<footer class="mt-5">
     Image Sequence Animation Ends Here
</footer>
!

CSS 

              
                .hero {
    background: black;
    padding: 40px;
    text-align: center;
    margin: 40px 0px;
}
.hero h1 {
    color: #fff;
}
.hero-sequence {
    height: 430vh;
}

.sticky-element {
    position: sticky;
    top: 0;
    overflow: hidden;
    display: flex;
    place-items: center;
    padding: 100px 0px;
}

footer {
    background: black;
    color: #fff;
    font-weight: 700;
    font-size: 40px;
    height: 400px;
    display: grid;
    place-items: center;
}
!

JS 

              
                const canvas = document.querySelector('canvas')
const ctx = canvas.getContext('2d')
const heroSequence = document.querySelector('.hero-sequence')
const images = []
const frameCount = 130
const prepareImages = () => {
    for (var i = 0; i < frameCount; i++) {
      const image = new Image()
      image.src = `./img/${i}.jpg`
      images.push(image)

      if (i === 0) {
        images[i].onload = () => drawImage(0)
      }
    }
}

const drawImage = frameIndex => {
    ctx.drawImage(images[frameIndex], 0, 0)
}

prepareImages()

window.addEventListener('scroll', () => {
    const scrollTop = document.documentElement.scrollTop - heroSequence.offsetTop;
    // const maxScrollTop = heroSequence.scrollHeight - window.innerHeight;
    const maxScrollTop = heroSequence.scrollHeight - window.innerHeight;
    const scrollFraction = scrollTop / maxScrollTop;
    // const frameIndex = Math.floor(window.scrollY / (window.innerHeight / images.length));
    const frameIndex = Math.max(0, Math.min(frameCount - 1, Math.ceil(scrollFraction * frameCount)));

    images[frameIndex].onload = () => drawImage(frameIndex);
    requestAnimationFrame(() => drawImage(frameIndex));
});
!
999px

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