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本帖最后由 李万金 于 2022-5-11 23:08 编辑
<li>的getBoundingClientRect返回值全为0(打印在console界面),但它明显不在左上角。
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Follow Along Nav</title>
- <style>
- html {
- box-sizing: border-box;
- font-family: "Arial Rounded MT Bold", "Helvetica Rounded", Arial, sans-serif;
- }
- *,
- *:before,
- *:after {
- box-sizing: inherit;
- }
- body {
- margin: 0;
- min-height: 100vh;
- background:
- linear-gradient(45deg, hsla(340, 100%, 55%, 1) 0%, hsla(340, 100%, 55%, 0) 70%),
- linear-gradient(135deg, hsla(225, 95%, 50%, 1) 10%, hsla(225, 95%, 50%, 0) 80%),
- linear-gradient(225deg, hsla(140, 90%, 50%, 1) 10%, hsla(140, 90%, 50%, 0) 80%),
- linear-gradient(315deg, hsla(35, 95%, 55%, 1) 100%, hsla(35, 95%, 55%, 0) 70%);
- }
- h2 {
- margin-top: 0;
- padding-top: .8em;
- }
- nav {
- position: relative;
- perspective: 600px;
- }
- .cool>li>a {
- color: yellow;
- text-decoration: none;
- font-size: 20px;
- background: rgba(0, 0, 0, 0.2);
- padding: 10px 20px;
- display: inline-block;
- margin: 20px;
- border-radius: 5px;
- }
- nav ul {
- list-style: none;
- margin: 0;
- padding: 0;
- display: flex;
- justify-content: center;
- }
- .cool>li {
- position: relative;
- display: flex;
- justify-content: center;
- }
- .dropdown {
- opacity: 0;
- position: absolute;
- overflow: hidden;
- padding: 20px;
- top: -20px;
- border-radius: 2px;
- transition: all 0.5s;
- transform: translateY(100px);
- will-change: opacity;
- display: none;
- }
- .trigger-enter .dropdown {
- display: block;
- }
- .trigger-enter-active .dropdown {
- opacity: 1;
- }
- .dropdownBackground {
- width: 100px;
- height: 100px;
- position: absolute;
- background: #fff;
- border-radius: 4px;
- box-shadow: 0 50px 100px rgba(50, 50, 93, .1), 0 15px 35px rgba(50, 50, 93, .15), 0 5px 15px rgba(0, 0, 0, .1);
- transition: all 0.3s, opacity 0.1s, transform 0.2s;
- transform-origin: 50% 0;
- display: flex;
- justify-content: center;
- opacity: 0;
- }
- .dropdownBackground.open {
- opacity: 1;
- }
- .arrow {
- position: absolute;
- width: 20px;
- height: 20px;
- display: block;
- background: white;
- transform: translateY(-50%) rotate(45deg);
- }
- .bio {
- min-width: 500px;
- display: flex;
- justify-content: center;
- align-items: center;
- line-height: 1.7;
- }
- .bio img {
- float: left;
- margin-right: 20px;
- }
- .courses {
- min-width: 300px;
- }
- .courses li {
- padding: 10px 0;
- display: block;
- border-bottom: 1px solid rgba(0, 0, 0, 0.2);
- }
- .dropdown a {
- text-decoration: none;
- color: #ffc600;
- }
- a.button {
- background: black;
- display: block;
- padding: 10px;
- color: white;
- margin-bottom: 10px;
- }
- /* Matches Twitter, TWITTER, twitter, tWitter, TWiTTeR... */
- .button[href*=twitter] {
- background: #019FE9;
- }
- .button[href*=facebook] {
- background: #3B5998;
- }
- .button[href*=courses] {
- background: #ffc600;
- }
- </style>
- </head>
- <body>
- <h2>Cool</h2>
- <nav class="top">
- <div class="dropdownBackground">
- <span class="arrow"></span>
- </div>
- <ul class="cool">
- <li>
- <a href="#">About Me</a>
- <div class="dropdown dropdown1">
- <div class="bio">
- <img src="https://logo.clearbit.com/wesbos.com">
- <p>Wes Bos sure does love web development. He teaches things like JavaScript, CSS and BBQ. Wait. BBQ isn't part of web development. It should be though!</p>
- </div>
- </div>
- </li>
- <li>
- <a href="#">Courses</a>
- <ul class="dropdown courses" >
- <li class="why">
- <span class="code">RFB</span>
- <a href="https://ReactForBeginners.com">React For Beginners</a>
- </li>
- <li>
- <span class="code">ES6</span>
- <a href="https://ES6.io">ES6 For Everyone</a>
- </li>
- <li>
- <span class="code">NODE</span>
- <a href="https://LearnNode.com">Learn Node</a>
- </li>
- <li>
- <span class="code">STPU</span>
- <a href="https://SublimeTextBook.com">Sublime Text Power User</a>
- </li>
- <li>
- <span class="code">WTF</span>
- <a href="http://Flexbox.io">What The Flexbox?!</a>
- </li>
- <li>
- <span class="code">GRID</span>
- <a href="https://CSSGrid.io">CSS Grid</a>
- </li>
- <li>
- <span class="code">LRX</span>
- <a href="http://LearnRedux.com">Learn Redux</a>
- </li>
- <li>
- <span class="code">CLPU</span>
- <a href="http://CommandLinePowerUser.com">Command Line Power User</a>
- </li>
- <li>
- <span class="code">MMD</span>
- <a href="http://MasteringMarkdown.com">Mastering Markdown</a>
- </li>
- </ul>
- </li>
- <li>
- <a href="#">Other Links</a>
- <ul class="dropdown dropdown3">
- <li><a class="button" href="http://twitter.com/wesbos">Twitter</a></li>
- <li><a class="button" href="http://facebook.com/wesbos.developer">Facebook</a></li>
- <li><a class="button" href="http://wesbos.com">Blog</a></li>
- <li><a class="button" href="http://wesbos.com/courses">Course Catalog</a></li>
- </ul>
- </li>
- </ul>
- </nav>
- <script>
- const whyLabel = document.querySelector('.why')
- positionOfWhyLabel = whyLabel.getBoundingClientRect();
- console.log(positionOfWhyLabel);
- </script>
- </body>
- </html>
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