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Sasuke Khan answered on October 13, 2022 Popularity 5/10 Helpfulness 4/10

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<div class="wrap">
      <nav class="nav">
        <ul>
          <li><a href="#section1">HOME</a></li>
          <li><a href="#section2">About</a></li>
          <li><a href="#section3">Contact</a></li>
          <li><a href="#section4">Blog</a></li>
          <li><a href="#section5">Portfoilo</a></li>
        </ul>
      </nav>
      <div class="main">
        <h1>Automatic Scroll Menu Highlight</h1>
        <section id="section1" class="section1">
          <h2>Section 1</h2>
          <p>
            Scroll the page up and down and the left hand menu will
            automatically highlight the current section. No JS was harmed in
            producing this function.
          </p>
          <p>
            This demo is proof of concept only and requires on a few 'magic
            numbers' so is of limited use other than an exercise in what can be
            done with CSS alone.
          </p>
          <p>Enjoy...</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
          <p>scroll</p>
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        </section>
	</div>
</div>
        
        <----------------------CSS-------------------------->
        html {
  box-sizing: border-box;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
html {
  overflow: hidden;
}
body {
  scroll-behavior: smooth;
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch; /* Lets it scroll lazy */
  height: 100vh;
}
html,
body {
  margin: 0;
  padding: 0;
}
h1 {
  text-align: center;
  margin: 0;
  padding: 1rem 0;
  background: palegoldenrod;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.wrap {
  display: flex;
  align-items: flex-start;
  position: relative;
  background: #f9f9f9;
}
.main {
  flex: 1 0 0;
  background: #8000006e;
}
.main p {
  padding: 0 10px;
  margin: 0.5rem 0 1rem;
}
.main .item1 {
  margin: 0 0 0 -220px; /* magic number alert*/
}
.nav {
  width: 200px;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  margin-right: 1rem;
  z-index: 2;
  box-shadow: 0 0 10px 10px rgba(0, 0, 0, 0.3);
  background: rgba(0, 0, 0, 0.1);
}
.nav a {
  padding: 5px 10px;
  text-decoration: none;
  border: 1px solid #000;
  display: block;
  height: 2rem; /* magic number alert*/
  color: #000;
}
.nav a:hover {
  background: #ccc;
}
.wrap section h2 {
  margin: -2rem 0 0;
  position: -webkit-sticky;
  position: sticky;
  top: 0px;
  background: #000;
  color: #fff;
  padding: 5px 10px;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}
.wrap section:before {
  content: '\2190';
  display: block;
  margin: 0 1rem 0 0;
  position: -webkit-sticky;
  position: sticky;
  top: 1px;
  left: 0;
  height: 2rem; /* magic number alert*/
  line-height: 2rem;
  text-align: right;
  background: linear-gradient(to left, red, red 10px, transparent 10px),
    linear-gradient(to left, #eee, #ccc);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: 200px 2rem;
  width: 198px;
  margin-left: -215px;
  color: transparent;
}

.wrap .section2:before {
  top: 2rem; /* magic number alert*/
  background-position: 0 2rem;
}
/* magic number alerts below */
.wrap .section3:before {
  top: 4rem;
  background-position: 0 4rem;
}
.wrap .section4:before {
  top: 6rem;
  background-position: 0 6rem;
}
.wrap .section5:before {
  top: 8rem;
  background-position: 0 8rem;
}

Popularity 5/10 Helpfulness 4/10 Language html

Source: Grepper

Tags: highlight html nav scroll

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Contributed on Oct 13 2022

Sasuke Khan

0 Answers Avg Quality 2/10

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