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捲動時變更文字顏色

我正在製作作品集網站，我希望我的固定文字在某些部分更改其顏色，我該怎麼做？我無法發布我的程式碼，因為它太大太長，但如果你能給出程式碼範例會非常高興，這就是它的樣子（https://olaolu.dev），你會看到按鈕和名稱如何在滾動時改變顏色：）

P.請用js來做，謝謝！

我試著找訊息，但什麼也沒找到:(

<!doctype html>
<html>
<head>
    <link rel="stylesheet" href="/b/cs.css">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.css">
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
</head>
<body>

    <section class="section-top active" id="s1">
        
        <div class="details">
            <div class="top">
                <h2>Faxraddin</h2>
                <div class="lists">
                    <div class="nav-btn" id="nav-icon1" onclick="document.getElementById('nav-icon1').classList.toggle('open')">
                        <span></span>
                        <span></span>
                        <span></span>
                    </div>
                </div>
                <div class="hide-it">
                    <div class="hide1">
                        <div class="p1">
                            <a class="hide1-btn">My Work</a>
                            <a class="hide1-btn">My Shelf</a>
                            <a class="hide1-btn">My Resume</a>
                        </div>
                         
                        <div class="p2">
                            <a class="hide-span">SAY HELLO</a>
                            <a class="hide-span">[email protected]</a>
                            <a class="hide-span">t/me.com</a>
                        </div>
                    </div>
                </div>
            </div>

            <div class="first-info">
                <div class="first-sec">
                    <h1>Frontend</br> Developer.</h1>
                    <h3 class="profession-info">I like to craft solid and scalable frontend products with great user experiences.</h3>
                </div>
                <img class="my-img" src="/b/images/Screenshot 2022-11-04 at 19.35.20.png">
            </div>

            <div class="some-info">
                <div class="a1">
                    <span>Highly skilled at progressive
                enhancement, design systems &
                UI Engineering.
                    </span>
                    <span>Over a decade of experience
                building products for clients
                across several countries.
                    </span>
                </div>

                <div class="btn-container">
                    <ul>
                        <a class="a" href="#s1"><div class="btn"></div></a>
                        <a class="a" href="#s2"><div class="btn"></div></a>
                        <a class="a" href="#s3"><div class="btn"></div></a>
                        <a class="a" href="#s4"><div class="btn"></div></a>
                        <a class="a" href="#s5"><div class="btn"></div></a>
                    </ul>
                </div>
            </div>

        </div>
    </section>

     
     <section class="what-do" id="s2">
         <div class="my-info">
            <div class="what-doing" id="i1">
                <h1>Design</h1>
                <p>
                    I'm probably not the typical designer positioned behind an Illustrator artboard adjusting pixels, but I design. Immersed in stylesheets tweaking font sizes and contemplating layouts is where you'll find me (~_^). I'm committed to creating fluent user experiences while staying fashionable.
                </p>
            </div>
            <div class="what-doing" id="i2">
                <h1>Engineering</h1>
                <p>
                    In building JavaScript applications, I'm equipped with just the right tools, and can absolutely function independently of them to deliver fast, resilient solutions optimized for scale — performance and scalabilty are priorities on my radar
                </p>
            </div>
         </div>
     </section>

    <section class="exp" id="s3">
        <div class="e1">
            <div class="exp-info">
                <h2>Over the</br> past 3 years,</h2>
                <p>I've built products for companies and businesses around the globe ranging from marketing websites to complex solutions and enterprise apps with focus on fast, elegant and accessible user experiences.</p>
                <p>Currently, I work at Shopify as a Senior UX Developer and Accessibility advocate crafting thoughtful and inclusive experiences that adhere to web standards for over a million merchants across the world.</p>
                <p>Before now, I was Principal Frontend Engineer at hellotax, where I worked on a suite of tools and services tailored at providing fast, automated VAT Registration / filings & Returns solutions for multi-channel sellers across Europe.</p>
                <p>Prior to hellotax, I was Senior frontend engineering contractor with Pixel2HTML, building JavaScript applications and interfaces for orgs and individuals.</p>
                <p>I once also led the frontend team at a Russian startup, Conectar through building multiple React applications into a single robust learning platform.</p>
            </div>
            <img class="exp-img" src="/b/images/2634454 copy.pdf">
        </div>
    </section>

    <section class="done" id="s4">
        <div class="grid">
            <div class="what-done">
                <div class="w1">
                    <h1>I buld & </br> deign stuff</h1>
                    <p>Open source 
                    projects, web apps 
                    and experimentals.
                    </p>
                    <button class="done-btn">see my work ---></button>
                </div>
                <div class="w2">
                    <h1>I write,</br>sometimes</h1>
                    <p>About design, 
                    frontend dev, 
                    learning and life.
                    </p>
                    <button class="done-btn">read my article ---></button>
                </div>
            </div>
        </div>
    </section>

    <section id="s5" class="send-me">
        <div class="send-container">
            <div class="send-top">
                <h1>Send me a message!</h1>
                <p>Got a question or proposal, or just want</br>
                    to say hello? Go ahead.</p>
            </div>
            <div class="send-inputs">
                <div class="l">
                    <label>Your Name</label>
                    <input type="text" placeholder="Enter your name">
                </div>

                <div class="l">
                    <label>Email Address</label>
                    <input type="text" placeholder="Enter your address">
                </div>
            </div>
            <div class="send-final">
                <input type="text" placeholder="Hi,i think we have to work together">
                <button class="shoot">SHOOT ---></button>
            </div>
        </div>
    </section>

    <section class="end-1" id="s6">
        <div class="end-container">
            <div class="end-info">
                <div class="e2" id="ll">
                    <span>SAY HELLO</span>
                    <span>[email protected]</span>
                    <span>t.me/mrolaolu</span>
                </div>
                <div class="e2">
                    <span>My Work</span>
                    <span>My Shelf</span>
                    <span>My Resume</span>
                </div>
            </div>
            <h2 class="end-link">© Faxraddin Olawuyi 2022</h2>
        </div>
    </section>

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


    body {
    margin: 0;
    padding: 0;
    scroll-snap-type: y mandatory;
}

html{
    scroll-behavior: smooth;
}

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    height: .35vw;
    background-color: #333;
    margin: 6px 0;
    transition: 0.2s;
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.change .bar1 {
    transform: translate(0, 11px) rotate(-45deg);
}

.change .bar2 {opacity: 0;}

.change .bar3 {
    transform: translate(0, -11px) rotate(45deg);
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section{
    scroll-snap-align: start;
}

.section-top{
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    padding-bottom: 10vw;
}

.details{
    background-color:#0b2361;
    background-repeat: no-repeat;
    background-size: 100vw 100%;
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.top {
    display: flex;
    justify-content: space-between;
    padding: 1vw;
    padding-bottom: 6vw;
}

.top h2{
    font-size: 2.2vw;
    margin: 0;
    margin-top: 30px;
    margin-left: 60px;
    color:#e9ecf4;
    position: fixed;
    z-index: 3;
}

.nav-btn {
    background: none;
    border: none;
    font-size: 3vw;
    cursor: pointer;
    position: fixed;
    right: 4.5vw;
    top:4vw;
    z-index: 3;
    padding-bottom: 2vw;
}

#l1{
    width: 3vw;
}

#l2{
    width: 2vw;
}

.first-info{
    display: flex;
    justify-content: space-between;
    width: 70vw;
    margin-left: 10vw ;
    padding-top: 30px;
}

.first-sec h1{
    font-size: 4.4vw;
    color: #f1554c;
}

.first-sec h3{
    width: 35vw;
    margin-top: -2vw;
    font-size: 1.5vw;
    color:#e9ecf4;
}

.my-img{
    width: 24vw;
    margin-top: 10px;
}

.a1{
    display: flex;
    justify-content: space-between;
    width: 35vw;
    margin-left: 10vw ;
    padding-top: 30px;
    color:#f1554c;
    margin-top: 20px;
    padding-bottom: 6.5vw;
    font-size: 1.3vw;
}

.a1 span{
    width: 45%;
    font-size: 1vw;
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.some-info {
    display: flex;
    justify-content: space-between;
    width: 93vw;
}

.btn-container{
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    z-index: 1;
    right: 0;
    padding-right: 5.5vw;
    margin-top: -3vw;
    
}

.btn-container ul{
    display: flex;
    flex-direction: column;
    align-items: center;
}

.btn{
    margin:.7vw;
    cursor: pointer;
    z-index: 1;
    width: .2vw;
    height: .2vw;
    background-color: black;
    transform: rotate(45deg);
    border-style:solid;
    transition: 0.3s;
}

.what-do{
    background-repeat: no-repeat;
    background-size: 100vw 100%;
    height: 840px;
    background-color: #e9ecf4;
}

.my-info{    
    display: flex;
    margin-left: 7vw ;

    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
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.what-doing{
    width: 50%;
}

.what-doing h1{
    font-size: 4vw;
    color: #f1554c;
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.what-doing p{
    font-size: 1.2vw;
    width: 30vw;
    margin-top: -2vw;
    color:#0b2361;
}

#i2{
    margin-top: 17vw;
    margin-left: 1vw;
}

.exp{
    height: 840px;
    background-color:#0b2361
}

.e1{
    display: flex;
    justify-content: space-between;
    width: 85vw;
    padding-top: 1vw;
    margin-left: -8vw;
    padding-bottom: 2vw;

    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.exp-info{
    display: flex;
    flex-direction: column;
    margin-left: 10vw;
    color: #e9ecf4;
}

.exp-info h2{
    font-size: 4.5vw;
    margin-bottom: 0;
}

.exp-info p{
    width: 25vw;
    font-size: 1.1vw;
}

.exp-img{
    height: 40vw;
    margin-top: 6vw;
}

.done{
    height: 840px;
    background-color:#e9ecf4;
}

.grid{
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.what-done{
    display: flex;
    margin: auto;
    width: 90vw;
    height: 40vw;
    background-color: whitesmoke;
}

.w1{
    width: 50%;
    text-align: left;
    padding: 5vw;

}

.w2{
    width: 50%;
    text-align: left;
    padding: 5vw;
    border-left-style: solid;
    border-width: thin;
}

.w1 h1{
    font-size: 3.3vw;
    color: #f1554c;
}

.w1 p{
    font-size: 2vw;
    color:#0b2361;
}

.w2 h1{
    font-size: 3.3vw;
    color: #f1554c;
}

.w2 p{
    font-size: 2vw;
    color: #0b2361;
}

.done-btn{
    background: none;
    cursor: pointer;
    font-size: 1.3vw;
    padding: 1.3vw 5vw 1.3vw 5vw;
    margin-top: 3vw;
    color: #f1554c;
}

.hide-it{
    position: absolute;
    transition: 0.2s;
    background-color: white;
    height: 0;
    width: 25vw;
    position: fixed;
    right: 3vw;
    top:3vw;
    color: white;
}

.hide1{
    display: flex;
    flex-direction: column;
}

.p1{
    display: flex;
    flex-direction: column;
    padding-top: 6vw;
    padding-left: 2.7vw;
    transition: 0.1s;
    visibility: hidden;
    transition: 0.1;
}

.hide1-btn{
    border: none;
    background: none;
    font-size: 1.4vw;
    text-align: left;
    padding: 10px;
}

.p2{
    display: flex;
    flex-direction: column;
    padding-top: 6vw;
    padding-left: 2.7vw;
    transition: 0.1s;
    visibility: hidden;
    transition: 0.9;
}

.hode-1{
    font-size: 1.4vw;
    text-align: left;
    padding: 10px;
}

.hide-span{
    font-size: 1.4vw;
    text-align: left;
    padding: 10px;
}

.active{
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    height: 34vw;
    z-index: 2;
    color: black;
}

.active2{
    visibility: visible;
}
 
.btn.active1{
    background-color: white;
    width: .7vw;
    height: .7vw;
    transform: rotate(0deg);
    border-radius: 4px;
}

#nav-icon1 {
    width: 4vw;
    height: 3vw;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .5s ease-in-out;
    -moz-transition: .5s ease-in-out;
    -o-transition: .5s ease-in-out;
    transition: .5s ease-in-out;
    cursor: pointer;
  }
  
#nav-icon1 span {
    display: block;
    position: absolute;
    height: 3px;
    width: 3.5vw;
    background: black;
    border-radius: 9px;
    opacity: 1;
    left: 0;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .25s ease-in-out;
    -moz-transition: .25s ease-in-out;
    -o-transition: .25s ease-in-out;
    transition: .25s ease-in-out;
  }
  
  #nav-icon1 span:nth-child(1) {
    top: 0px;
  }
  
  #nav-icon1 span:nth-child(2) {
    top: 18px;
  }
  
  #nav-icon1 span:nth-child(3) {
    top: 36px;
  }
  
  #nav-icon1.open span:nth-child(1) {
    top: 18px;
    -webkit-transform: rotate(135deg);
    -moz-transform: rotate(135deg);
    -o-transform: rotate(135deg);
    transform: rotate(135deg);
  }
  
  #nav-icon1.open span:nth-child(2) {
    opacity: 0;
    left: -60px;
  }
  
  #nav-icon1.open span:nth-child(3) {
    top: 18px;
    -webkit-transform: rotate(-135deg);
    -moz-transform: rotate(-135deg);
    -o-transform: rotate(-135deg);
    transform: rotate(-135deg);
  }
  
.send-me{
    height: 840px;
    background-color: #e9ecf4;
    display: flex;
    justify-content: center;
    align-items: center;
}

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    font-size: 3.3vw;
    text-align: center;
    color: #f1554c;
}

.send-top p{
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    color:#0b2361;
    text-align: center;
    margin-top: -2vw;
    padding-bottom: 5vw;
}

.send-inputs{
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    justify-content: space-between;
    width: 50vw;
}

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    border-bottom: 5px solid black;
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    border-top: none;
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.l{
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}

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    width: 100%;
    outline: none;
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    height: 2vw;
    border-width: thin;
    border-bottom: 5px solid black;
    background: none;
    border-width: thin;
    border-top: none;
    border-left: none;
    border-right: none;
}

.shoot{
    border-width: thin;
    font-size: 1.3vw;
    border-color: black;
    margin-top: 4vw;
    width: 20vw;
    height: 4vw;

    background: none;
    cursor: pointer;
    font-size: 1.3vw;
    padding: 1.3vw 5vw 1.3vw 5vw;
}

.end-1{
    background-color: #0b2361;
    height: 830px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.end-container{
    display: flex;
    flex-direction: column;
    width: 80vw;
}

.end-info{
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    border-bottom: 5px solid #e9ecf4;
    background: none;
    border-width: thin;
    border-top: none;
    border-left: none;
    border-right: none;

    display: flex;
}

.e2{
    display: flex;
    flex-direction: column;
    font-size: 1.5vw;
    color: #e9ecf4;
    padding: 4vw 0vw 8vw 0vw;
}

.e2 span{
    padding-top: 1.5vw;
}

#ll{
    margin-top:-3vw;
    padding-right: 19vw;
}

.end-link{
    color: #e9ecf4;
    padding-top: 3vw;
}

P粉983021177P粉983021177267 天前370

全部回覆(1)我來回復

  • P粉884548619

    P粉8845486192024-03-29 13:33:33

    我認為你需要的是一個交叉點觀察者。交叉口觀察器可讓您「觀察」目標並在目標可見時做出反應。

    我創建了一個小例子來演示這一點。我們正在觀察第二節。當它可見時，我們將顏色變更為紫色。當它不可見時，我們將其改回黑色。 

    const title = document.querySelector('.topbar__title');
const sectionOne = document.querySelector('.section--one');
const sectionTwo = document.querySelector('.section--two');

const observer = new IntersectionObserver((entry, observer) => {
  entry[0].isIntersecting > 0 ?
    title.style.color = sectionTwo.getAttribute('data-color') :
    title.style.color = sectionOne.getAttribute('data-color')
});

observer.observe(sectionTwo);
    * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  padding: 1rem;
  width: 100%;
  background-color: white;
}

.section {
  height: 150vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section--one {
  background-color: white;
}

.section--two {
  background-color: rgb(255 0 0 / 5%);
}
    
  
    Title
    

    


    
  
    Section One
    

    


    
  
    Section Two

    當然你可以觀察多個部分，或是改變一個類別而不是用JS設定樣式。這只是一個簡單的例子...

    MDN 上有一些關於 Intersection Observers 的好資訊

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