前端新手项目练习50projects50days——双向垂直滚动

作者: 简单一点点 | 来源:发表于2021-12-09 09:40 被阅读0次

前端新手项目练习50projects50days——双向垂直滚动
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本项目介绍一个可以在垂直方向上下点击按钮进行滚动的效果。

double-vertial-slider.png

html部分内容较多，主要是添加左右两侧的背景，其中左侧是颜色，右侧是图片，另外还添加了两个按钮down-button和up-button用来控制上下滚动。

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.1/css/all.min.css" />
        <link rel="stylesheet" href="style.css" />
        <title>Vertical Slider</title> 
    </head>
    <body>
        <div class="slider-container">
            <div class="left-slide">
                <div style="background-color: #FD3555;">
                    <h1>Nature flower</h1>
                    <p>all in pink</p>
                </div>
                <div style="background-color: #2A86BA;">
                    <h1>Bluuue Sky</h1>
                    <p>with it's mountains</p>
                </div>
                <div style="background-color: #252E33;">
                    <h1>Lonely castle</h1>
                    <p>in the wilderness</p>
                </div>
                <div style="background-color: #FFB866;">
                    <h1>Flying eagle</h1>
                    <p>in the sunset</p>
                </div>
            </div>
            <div class="right-slide">
                <div style="background-image: url('https://images.unsplash.com/photo-1508768787810-6adc1f613514?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=e27f6661df21ed17ab5355b28af8df4e&auto=format&fit=crop&w=1350&q=80')"></div>
                <div style="background-image: url('https://images.unsplash.com/photo-1519981593452-666cf05569a9?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=90ed8055f06493290dad8da9584a13f7&auto=format&fit=crop&w=715&q=80')"></div>
                <div style="background-image: url('https://images.unsplash.com/photo-1486899430790-61dbf6f6d98b?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=8ecdee5d1b3ed78ff16053b0227874a2&auto=format&fit=crop&w=1002&q=80')"></div>
                <div style="background-image: url('https://images.unsplash.com/photo-1510942201312-84e7962f6dbb?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=da4ca7a78004349f1b63f257e50e4360&auto=format&fit=crop&w=1050&q=80')"></div>
            </div>
            <div class="action-buttons">
                <button class="down-button">
                    <i class="fas fa-arrow-down"></i>
                </button>
                <button class="up-button">
                    <i class="fas fa-arrow-up"></i>
                </button>
            </div>
        </div>

        <script src="script.js"></script>
    </body>
</html>

JS部分主要是根据按钮的点击事件来对左右两个部分的Y轴进行偏移，用来显示对应的部分。

const sliderContainer = document.querySelector('.slider-container')
const slideRight = document.querySelector('.right-slide')
const slideLeft = document.querySelector('.left-slide')
const upButton = document.querySelector('.up-button')
const downButton = document.querySelector('.down-button')
const slidesLength = slideRight.querySelectorAll('div').length

let activeSlideIndex = 0

// 左侧的顶部定位
slideLeft.style.top = `-${(slidesLength - 1) * 100}vh`

// 按钮添加点击监听事件
upButton.addEventListener('click', () => changeSlide('up'))
downButton.addEventListener('click', () => changeSlide('down'))

const changeSlide = (direction) => {
    const sliderHeight = sliderContainer.clientHeight
    // 根据按钮修改索引
    if(direction === 'up') {
        activeSlideIndex++
        if(activeSlideIndex > slidesLength - 1) {
            activeSlideIndex = 0
        }
    } else if(direction === 'down') {
        activeSlideIndex--;
        if(activeSlideIndex < 0) {
            activeSlideIndex = slidesLength - 1
        }
    }

    // 在Y轴方向（垂直）添加转换
    slideRight.style.transform = `translateY(-${activeSlideIndex * sliderHeight}px)`
    slideLeft.style.transform = `translateY(${activeSlideIndex * sliderHeight}px)`
}

CSS部分设置左右两部分分别占据35%和65%的宽度，然后设置Y轴偏移时候的transition动画。

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: sans-serif;
    height: 100vh;
}

.slider-container {
    position: relative;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

.left-slide {
    height: 100%;
    width: 35%;
    position: absolute;
    top: 0;
    left: 0;
    transition: transform 0.5s ease-in-out;
}

.left-slide > div {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.left-slide h1 {
    font-size: 40px;
    margin-bottom: 10px;
    margin-top: -30px;
}

.right-slide {
    height: 100%;
    position: absolute;
    top: 0;
    left: 35%;
    width: 65%;
    transition: transform 0.5s ease-in-out;
}

.right-slide > div {
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    height: 100%;
    width: 100%;
}

button {
    background-color: #fff;
    border: none;
    color: #aaa;
    cursor: pointer;
    font-size: 16px;
    padding: 15px;
}

button:hover {
    color: #222;
}

button:focus {
    outline: none;
}

.slider-container .action-buttons button {
    position: absolute;
    left: 35%;
    top: 50%;
    z-index: 100;
}

.slider-container .action-buttons .down-button {
    transform: translateX(-100%);
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.slider-container .action-buttons .up-button {
    transform: translateY(-100%);
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
}

double-vertical-slider.gif