<div id="parallax_banner" class="parallax_main">
            <section id="parallax-section-1" class="section active">
                <div class="section-content">
                    <div class="title-1">Environmental Protection is</div>
                    <div class="title-2">Our commitment to the Eatch</div>
                    <a href="#" class="button">Read more</a>
                </div>
                <img src="https://tools.digishot.name/freelancer/modernsolid/img/banner01-parts.png" alt="" class="picture">
                <div class="section-bg" style="background-image: url(https://tools.digishot.name/freelancer/modernsolid/img/banner01.jpg)"></div>
                <div class="scroll-down-mark">Scroll</div>
            </section>

            <section id="parallax-section-2" class="section">
                <div class="section-content">
                    <div class="title-1">Professionality Hospital Arm</div>
                    <div class="title-2">Improving healthcare efficiency</div>
                    <a href="#" class="button">Read more</a>
                </div>
                <img src="https://tools.digishot.name/freelancer/modernsolid/img/banner02-parts.png" alt="" class="picture">
                <div class="section-bg" style="background-image: url(https://tools.digishot.name/freelancer/modernsolid/img/banner02.jpg)"></div>
            </section>

            <section id="parallax-section-3" class="section">
                <div class="section-content">
                    <div class="title-1">Free Up Your Workspace</div>
                    <div class="title-2">For Better Working Comfort and Productivity</div>
                    <a href="#" class="button">Read more</a>
                </div>
                <img src="https://tools.digishot.name/freelancer/modernsolid/img/banner03-parts.png" alt="" class="picture">
                <div class="section-bg" style="background-image: url(https://tools.digishot.name/freelancer/modernsolid/img/banner03.jpg)"></div>
            </section>

            <section id="parallax-section-4" class="section">
                <div class="section-content">
                    <div class="title-1">Ergonomic Design Integrated into Life</div>
                    <div class="title-2">Cosy.user-friendly.stylish</div>
                    <a href="#" class="button">Read more</a>
                </div>
                <img src="https://tools.digishot.name/freelancer/modernsolid/img/banner04-parts.png" alt="" class="picture">
                <div class="section-bg" style="background-image: url(https://tools.digishot.name/freelancer/modernsolid/img/banner04.jpg)"></div>
            </section>

            <section id="parallax-section-5" class="section">
                <div class="section-content">
                    <div class="title-1">Your Most Valued Partner</div>
                    <div class="title-2">Designing And Manufacturing Mounting Solutions</div>
                    <a href="#" class="button">Read more</a>
                </div>
                <img src="https://tools.digishot.name/freelancer/modernsolid/img/banner05-parts.png" alt="" class="picture">
                <div class="section-bg" style="background-image: url(https://tools.digishot.name/freelancer/modernsolid/img/banner05.jpg)"></div>
            </section>

            <section class="section --scroll">
                <div class="section-content">
                    <div>begin</div>
                    <div style="height:2000px"></div>
                    <div>end</div>
                    <div class="section-bg"></div>
                    <div class="picture"></div>
            </section>
        </div>
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;400;700&display=swap');

$default-width: 1920px;
$tv-width: 1440px;
$desktop-width: 1200px;
$tablet-width-lg: 991px;
$tablet-width: 768px;
$mobile-width: 600px;

@mixin default {
    @media (min-width: #{$default-width}) {
      @content;
    }
  }

@mixin tv {
    @media (max-width: #{$tv-width}) {
      @content;
    }
  }

@mixin desktop {
  @media (max-width: #{$desktop-width}) {
    @content;
  }
}

@mixin tablet-lg {
  @media (max-width: #{$tablet-width-lg}) {
    @content;
  }
}

@mixin tablet {
    @media (max-width: #{$tablet-width}) {
      @content;
    }
  }

@mixin mobile {
    @media (max-width: #{$mobile-width}) {
      @content;
    }
  }

body{
    top:0;
    overflow:hidden;
    z-index:1;
    background:#fff;
    font-family: Poppins;
}

.parallax_main {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    z-index: 1;
}

.section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    color: white;
    display: flex;
    flex-flow: column nowrap;
    justify-content: center;
    align-items: center;
    z-index: 4;
    will-change: transform;
    overflow: hidden;

    &.active {
        z-index: 5;
    }
}

.section-content {
    z-index: 4;
    color: #393B3A;
    padding: 10px;
    position: absolute;
    left: 2%;

    .title-1 {
        font-size: 2.2vw;
        font-weight: 700;
        line-height: 2.5vw;
    }

    .title-2 {
        font-size: 1.7vw;
        font-weight: 400;
    }

    .button {
        margin-top: 20px;
        display: block;
        padding: 10px 15px;
        width: 160px;
        color: #fff;
        background: #3A3A3A;
        font-size: 16px;
        transition: 1s;

        &:hover {
            text-decoration: none;
            background: #5A5A5A;
        }
    }
}

.section-bg {
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    will-change: transform;
    background-position: right bottom;
    background-size: cover;
    background-repeat: no-repeat;

    @include tv{
        background-size: auto;
    }
}

.picture {
    position: absolute;
    z-index: 2;
    top: 15%;
    right: 0;
    display: block;
    transform: scale(1);
    max-width: none;

    @include tv{
        transform: scale(0.9);
    }

    @include desktop{
        transform: scale(0.8);
    }
}

.--scroll {
    overflow: auto;
    display: block;
    width: 100%;
    .section-content {
        width:100%;
        left:0;
    }
}

#parallax-section-1 {
    .scroll-down-mark{
        position:absolute;
        bottom:0;
        right:25px;
        background-color: #004EA1;
        color:#fff;
        z-index:2;
        font-size:14px;
        font-weight: 200;
        text-align: center;
        width: 60px;
        padding-top:70px;
        padding-bottom:20px;
    }

    .section-content {
        color: #fff;

        @include tv{
            top:15%;
        }

        @include desktop{
            top:15%;
        }

        @include tablet-lg {
           top:10%;
        }

        .title-1{
            @include tv{
                font-size:4vw;
                line-height:4vw;
            }

            @include desktop{
                font-size:4vw;
                line-height:4vw;
            }

            @include tablet-lg {
                font-size:6vw;
                line-height:6vw;
            }
        }
        .title-2{
            @include desktop{
                font-size:3vw;
                line-height:3vw;
            }

            @include tablet-lg {
                font-size:5vw;
                line-height:6vw;
            }
        }
    }

    .picture{
        @include tv{
            top:auto;
            bottom: -10%;
            right: -7%;
        }

        @include desktop{
            right: -15%;
        }

        @include tablet-lg{
            bottom:-5%;
            right:-5%;
        }

        @include mobile{
            width:100%;
            transform: scale(1);
            right:0;
            bottom:0;
        }
    }
}

#parallax-section-2 {
    .section-content {
        left: 2%;
        top: 36%;

        @include tv{
            bottom:2%;
            top:auto;
        }

        .title-1 {
            @include tv{
                font-size:4vw;
                line-height:4vw;
            }

            @include desktop{
                font-size:4vw;
                line-height:4vw;
            }

            @include tablet-lg {
                font-size:6vw;
                line-height:6vw;
            }
        }

        .title-2 {
            @include desktop{
                font-size:3vw;
                line-height:3vw;
            }

            @include tablet-lg {
                font-size:5vw;
                line-height:6vw;
            }
        }
    }

    .picture {
        top: 0;
        right: -8%;

        @include tv{
            transform: scale(0.8);
            top: -12%;
            right: -18%;
        }

        @include tablet{
            left:0;
            right:auto;
        }

        @include mobile{
            transform:scale(0.7);
            left: -13%;
            top: -25%;
        }
    }
}

#parallax-section-3 {
    .section-content {
        top: 38%;

        @include tv{
            top: auto;
            bottom: 10%;
        }

        .title-1 {
            @include tv{
                font-size:4vw;
                line-height:4vw;
            }

            @include desktop{
                font-size:4vw;
                line-height:4vw;
            }

            @include tablet-lg {
                font-size:6vw;
                line-height:6vw;
            }
        }

        .title-2 {
            width: 70%;
            line-height: 2vw;
            @include desktop{
                font-size:3vw;
                line-height:3vw;
            }

            @include tablet-lg {
                font-size:5vw;
                line-height:5vw;
            }
        }
    }

    .picture {
        top: auto;
        bottom: 3%;
        right: -3%;

        @include tv{
            bottom: -1%;
            right: -7%;
        }

        @include desktop {
            bottom: -4%;
            right: -15%;
        }

        @include mobile{
            bottom: -4%;
            right: -25%;
        }
    }
}

#parallax-section-4 {
    .section-content {
        color: #fff;
        left: 2%;
        top: 35%;

        @include tv{
            top: auto;
            bottom: 10%;
            text-shadow: 0 0 5px rgba(0,0,0,0.5);
        }
        
        @include desktop{
            top: auto;
            bottom: 30%;
            width: 80%;
            left: 37%;
        }

        @include tablet-lg{
            bottom: 25%;
            left: 50%;
        }

        @include tablet{
            bottom: auto;
            top:10%;
        }

        @include mobile{
            bottom: 21%;
            top: auto;
        }

        .title-1 {
            width: 60%;
            @include tv{
                font-size:4vw;
                line-height:4vw;
            }

            @include desktop{
                font-size:4vw;
                line-height:4vw;
            }

            @include tablet-lg {
                font-size:6vw;
                line-height:6vw;
            }
        }

        .title-2 {
            width: 60%;
            @include desktop{
                font-size:3vw;
                line-height:3vw;
            }

            @include tablet-lg {
                font-size:5vw;
                line-height: 5vw;
            }
        }
    }

    .picture {
        bottom: 0%;
        right: 21%;
        top: auto;

        @include desktop{
            right: 35%;
        }

        @include tablet-lg{
            right: 40%;
        }

        @include tablet{
            right: 28%;
            bottom: -11%;
        }
        @include mobile{
            transform: scale(0.7);
            right: auto;
            bottom: auto;
        }
    }

    .section-bg{
        @include mobile{
            background-position: bottom left;
        }
    }
}

#parallax-section-5 {
    .section-content {
        left: 2%;
        top: 35%;
        .title-1 {
            @include tv{
                font-size:4vw;
                line-height:4vw;
            }

            @include desktop{
                font-size:4vw;
                line-height:4vw;
            }

            @include tablet-lg {
                font-size:6vw;
                line-height:6vw;
            }
        }

        .title-2 {
            @include desktop{
                font-size:3vw;
                line-height:3vw;
            }

            @include tablet-lg {
                font-size:5vw;
                line-height:6vw;
            }
        }
    }

    .picture {
        top: auto;
        right: auto;
        bottom: -5%;
        left: 20%;

        @include desktop{
            bottom: -8%;
        }
    }

    .section-bg {
        background-position: bottom right;
        background-size: cover;
    }
}
View Compiled
$(function(){
    let _ = window._;

    const sections = document.querySelectorAll(".section");
    const sectionsBG = document.querySelectorAll(".section-bg");
    const sectionsPicture = document.querySelectorAll(".picture");
    const duration = 0.8;
    const ease = "power4.inOut";
    const amt = $(".section").length - 1;

    let scrolling;

    let prevSection = -1;
    let activeSection = 0;
    let nextSection = 1;

    var startCoords = {}, endCoords = {};
    var touchstartY, touchendY = 0;
    $('.parallax_main').on('touchstart mousedown', function(event){
        event.preventDefault();
        startCoords = event.originalEvent.targetTouches[0];
        touchstartY = startCoords.pageY;
    })
    .on('touchstart touchmove mousemove', function(event){
        event.preventDefault();
        endCoords = event.originalEvent.targetTouches[0];
        //console.log(endCoords);
    })
    .on('mouseup mouseleave touchend', function(e){
        touchendY = endCoords.pageY;
        // console.log('start: '+touchstartY);
        // console.log('end: '+touchendY);
        handleGesure();
    });

    function handleGesure() {
        var swiped = 'swiped: ';
        if (touchendY < touchstartY) {
            //console.log(swiped + 'down!');
            if (activeSection < amt) slidesDown();
        }
        if (touchendY > touchstartY) {
            //console.log(swiped + 'up!');
            if (activeSection > 0) slidesUp();
        }
    }

    // Init Slides
    const initSlides = () => {
    sections.forEach((section, index) => {
        if (index != activeSection) {
            gsap.set(section, {
                yPercent: 100
            });
            gsap.set(sectionsBG[index], {
                yPercent: -50
            });
            gsap.set(sectionsPicture[index], {
                yPercent: 80
            });
        }
    });
    };

    // Update Slides
    const updateSlides = () => {
    sections.forEach((section, index) => {
        if (index == activeSection) {
        section.classList.add("active");
        } else {
        section.classList.remove("active");
        }
    });
    };

    // SCROLL UP FUNCTIONALITY
    const slidesUp = () => {
    // Current Slide
    gsap.to(sections[activeSection], {
        yPercent: 100,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsBG[activeSection], {
        yPercent: -50,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsPicture[activeSection], {
        yPercent: 80,
        duration: duration,
        ease: ease
    });
    // Previous Slide
    gsap.to(sections[prevSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsBG[prevSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsPicture[prevSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    // Set new vars
    prevSection--;
    activeSection--;
    nextSection--;
    };

    // SCROLL DOWN FUNCTIONALITY
    const slidesDown = () => {
    // Current Slide
    gsap.to(sections[activeSection], {
        yPercent: -100,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsBG[activeSection], {
        yPercent: 50,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsPicture[activeSection], {
        yPercent: -80,
        duration: duration,
        ease: ease
    });
    // Next Slide
    gsap.to(sections[nextSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsBG[nextSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    gsap.to(sectionsPicture[nextSection], {
        yPercent: 0,
        duration: duration,
        ease: ease
    });
    // Set new vars
    prevSection++;
    activeSection++;
    nextSection++;
    };

    // Update index on scroll
    const handleWheel = (e) => {
    // UP
    if (e.deltaY < -1) {
        if (activeSection == 0) {
        return;
        } else if (activeSection == sections.length - 1) {
        if (sections[activeSection].scrollTop == 0) {
            slidesUp();
        }
        } else {
        slidesUp();
        }
    }
    // DOWN
    else if (e.deltaY > 1) {
        if (activeSection == sections.length - 1) {
        return;
        }
        slidesDown();
    }
    
    updateSlides();
    };


    // ON SCROLL
    const throttleWheel = _.throttle(handleWheel, 750, { trailing: false, leading: true });
    window.addEventListener("wheel", throttleWheel);

    // ON ARROW KEY
    const handleKeyUp = (e) => {
    if (e.key == "ArrowUp" && activeSection != 0) {
        slidesUp();
    } else if (e.key == "ArrowDown" && activeSection != sections.length - 1) {
        slidesDown();
    }
    updateSlides();
    };

    window.addEventListener(
    "keyup",
    _.throttle(handleKeyUp, 750, { trailing: false, leading: true })
    );

    initSlides();
});

External CSS

  1. https://necolas.github.io/normalize.css/latest/normalize.css
  2. https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js
  3. https://cdnjs.cloudflare.com/ajax/libs/gsap/3.8.0/gsap.min.js
  4. https://cdnjs.cloudflare.com/ajax/libs/gsap/3.8.0/ScrollTrigger.min.js
  5. https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js