HTML:
<!DOCTYPE html> <html lang="zh" class="no-js"> <head> <meta charset="UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>表单input输入框</title> <style> article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary { display: block; } audio, canvas, video { display: inline-block; } audio:not([controls]) { display: none; height: 0; } [hidden] { display: none; } html { font-family: sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; } body { margin: 0; } a:focus { outline: thin dotted; } a:active, a:hover { outline: 0; } h1 { font-size: 2em; margin: 0.67em 0; } abbr[title] { border-bottom: 1px dotted; } b, strong { font-weight: bold; } dfn { font-style: italic; } hr { -moz-box-sizing: content-box; box-sizing: content-box; height: 0; } mark { background: #ff0; color: #000; } code, kbd, pre, samp { font-family: monospace, serif; font-size: 1em; } pre { white-space: pre-wrap; } q { quotes: "201C" "201D" "2018" "2019"; } small { font-size: 80%; } sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; } sup { top: -0.5em; } sub { bottom: -0.25em; } img { border: 0; } svg:not(:root) { overflow: hidden; } figure { margin: 0; } fieldset { border: 1px solid #c0c0c0; margin: 0 2px; padding: 0.35em 0.625em 0.75em; } legend { border: 0; padding: 0; } button, input, select, textarea { font-family: inherit; font-size: 100%; margin: 0; } button, input { line-height: normal; } button, select { text-transform: none; } button, html input[type="button"], input[type="reset"], input[type="submit"] { -webkit-appearance: button; cursor: pointer; } button[disabled], html input[disabled] { cursor: default; } input[type="checkbox"], input[type="radio"] { box-sizing: border-box; padding: 0; } input[type="search"] { -webkit-appearance: textfield; -moz-box-sizing: content-box; -webkit-box-sizing: content-box; box-sizing: content-box; } input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; } button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0; } textarea { overflow: auto; vertical-align: top; } table { border-collapse: collapse; border-spacing: 0; } @import url(http://fonts.useso.com/css?family=Raleway:200,500,700,800); @font-face { font-weight: normal; font-style: normal; font-family: 'codropsicons'; src: url('../fonts/codropsicons/codropsicons.eot'); src: url('../fonts/codropsicons/codropsicons.eot?#iefix') format('embedded-opentype'), url('../fonts/codropsicons/codropsicons.woff') format('woff'), url('../fonts/codropsicons/codropsicons.ttf') format('truetype'), url('../fonts/codropsicons/codropsicons.svg#codropsicons') format('svg'); } *, *:after, *:before { -webkit-box-sizing: border-box; box-sizing: border-box; } .clearfix:before, .clearfix:after { content: ''; display: table; } .clearfix:after { clear: both; } body { background: #f9f7f6; color: #404d5b; font-weight: 500; font-size: 1.05em; font-family: 'Raleway', Arial, sans-serif; } a { color: #2fa0ec; text-decoration: none; outline: none; } a:hover, a:focus { color: #74777b; } .container { margin: 0 auto; text-align: center; overflow: hidden; } .content { font-size: 150%; padding: 3em 0; } .content h2 { margin: 0 0 2em; opacity: 0.1; } .content p { margin: 1em 0; padding: 5em 0 0 0; font-size: 0.65em; } .bgcolor-1 { background: #f0efee; } .bgcolor-2 { background: #f9f9f9; } .bgcolor-3 { background: #e8e8e8; } .bgcolor-4 { background: #2f3238; color: #fff; } .bgcolor-5 { background: #df6659; color: #521e18; } .bgcolor-6 { background: #2fa8ec; } .bgcolor-7 { background: #d0d6d6; } .bgcolor-8 { background: #3d4444; color: #fff; } body .nomargin-bottom { margin-bottom: 0; } /* Header */ .codrops-header { padding: 3em 190px 4em; letter-spacing: -1px; } .codrops-header h1 { font-weight: 800; font-size: 4em; line-height: 1; margin-bottom: 0; } .codrops-header h1 span { display: block; font-size: 50%; font-weight: 400; padding: 0.325em 0 0.5em 0; color: #c3c8cd; } /* Top Navigation Style */ .codrops-links { position: relative; display: inline-block; white-space: nowrap; font-size: 1.25em; text-align: center; } .codrops-links::after { position: absolute; top: 0; left: 50%; margin-left: -1px; width: 2px; height: 100%; background: #dbdbdb; content: ''; -webkit-transform: rotate3d(0, 0, 1, 22.5deg); transform: rotate3d(0, 0, 1, 22.5deg); } .codrops-icon { display: inline-block; margin: 0.5em; padding: 0em 0; width: 1.5em; text-decoration: none; } .codrops-icon span { display: none; } .codrops-icon:before { margin: 0 5px; text-transform: none; font-weight: normal; font-style: normal; font-variant: normal; font-family: 'codropsicons'; line-height: 1; speak: none; -webkit-font-smoothing: antialiased; } .codrops-icon--drop:before { content: "e001"; } .codrops-icon--prev:before { content: "e004"; } /* Related demos */ .content--related { text-align: center; color: #D8DADB; font-weight: bold; } .media-item { display: inline-block; padding: 1em; vertical-align: top; -webkit-transition: color 0.3s; transition: color 0.3s; } .media-item__img { opacity: 0.8; -webkit-transition: opacity 0.3s; transition: opacity 0.3s; } .media-item:hover .media-item__img, .media-item:focus .media-item__img { opacity: 1; } .media-item__title { font-size: 0.75em; margin: 0; padding: 0.5em; } @media screen and (max- 50em) { .codrops-header { padding: 3em 10% 4em; } } @media screen and (max- 40em) { .codrops-header h1 { font-size: 2.8em; } } article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary { display: block; } audio, canvas, video { display: inline-block; } audio:not([controls]) { display: none; height: 0; } [hidden] { display: none; } html { font-family: sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; } body { margin: 0; } a:focus { outline: thin dotted; } a:active, a:hover { outline: 0; } h1 { font-size: 2em; margin: 0.67em 0; } abbr[title] { border-bottom: 1px dotted; } b, strong { font-weight: bold; } dfn { font-style: italic; } hr { -moz-box-sizing: content-box; box-sizing: content-box; height: 0; } mark { background: #ff0; color: #000; } code, kbd, pre, samp { font-family: monospace, serif; font-size: 1em; } pre { white-space: pre-wrap; } q { quotes: "201C" "201D" "2018" "2019"; } small { font-size: 80%; } sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; } sup { top: -0.5em; } sub { bottom: -0.25em; } img { border: 0; } svg:not(:root) { overflow: hidden; } figure { margin: 0; } fieldset { border: 1px solid #c0c0c0; margin: 0 2px; padding: 0.35em 0.625em 0.75em; } legend { border: 0; padding: 0; } button, input, select, textarea { font-family: inherit; font-size: 100%; margin: 0; } button, input { line-height: normal; } button, select { text-transform: none; } button, html input[type="button"], input[type="reset"], input[type="submit"] { -webkit-appearance: button; cursor: pointer; } button[disabled], html input[disabled] { cursor: default; } input[type="checkbox"], input[type="radio"] { box-sizing: border-box; padding: 0; } input[type="search"] { -webkit-appearance: textfield; -moz-box-sizing: content-box; -webkit-box-sizing: content-box; box-sizing: content-box; } input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; } button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0; } textarea { overflow: auto; vertical-align: top; } table { border-collapse: collapse; border-spacing: 0; } </style> <!--[if IE]> <script src="http://libs.useso.com/js/html5shiv/3.7/html5shiv.min.js"></script> <![endif]--> </head> <body> <div class="container"> <section class="content bgcolor-1"> <h2 class="nomargin-bottom">Haruki</h2> <span class="input input--haruki"> <input class="input__field input__field--haruki" type="text" id="input-1"/> <label class="input__label input__label--haruki" for="input-1"> <span class="input__label-content input__label-content--haruki">First Name</span> </label> </span> <span class="input input--haruki"> <input class="input__field input__field--haruki" type="text" id="input-2"/> <label class="input__label input__label--haruki" for="input-2"> <span class="input__label-content input__label-content--haruki">Last Name</span> </label> </span> <span class="input input--haruki"> <input class="input__field input__field--haruki" type="text" id="input-3"/> <label class="input__label input__label--haruki" for="input-3"> <span class="input__label-content input__label-content--haruki">Email</span> </label> </span> </section> <section class="content"> <h2>Hoshi</h2> <span class="input input--hoshi"> <input class="input__field input__field--hoshi" type="text" id="input-4"/> <label class="input__label input__label--hoshi input__label--hoshi-color-1" for="input-4"> <span class="input__label-content input__label-content--hoshi">Name</span> </label> </span> <span class="input input--hoshi"> <input class="input__field input__field--hoshi" type="text" id="input-5"/> <label class="input__label input__label--hoshi input__label--hoshi-color-2" for="input-5"> <span class="input__label-content input__label-content--hoshi">Street</span> </label> </span> <span class="input input--hoshi"> <input class="input__field input__field--hoshi" type="text" id="input-6"/> <label class="input__label input__label--hoshi input__label--hoshi-color-3" for="input-6"> <span class="input__label-content input__label-content--hoshi">Town</span> </label> </span> <p>Inspired by Andrej Radisic's <a href="https://dribbble.com/shots/1785176-Jawbreaker-input-field">Jawbreaker input field</a></p> </section> <section class="content bgcolor-4"> <h2>Kuro</h2> <span class="input input--kuro"> <input class="input__field input__field--kuro" type="text" id="input-7"/> <label class="input__label input__label--kuro" for="input-7"> <span class="input__label-content input__label-content--kuro">Username</span> </label> </span> <span class="input input--kuro"> <input class="input__field input__field--kuro" type="text" id="input-8"/> <label class="input__label input__label--kuro" for="input-8"> <span class="input__label-content input__label-content--kuro">Website</span> </label> </span> <span class="input input--kuro"> <input class="input__field input__field--kuro" type="text" id="input-9"/> <label class="input__label input__label--kuro" for="input-9"> <span class="input__label-content input__label-content--kuro">Invitation Code</span> </label> </span> </section> <section class="content bgcolor-7"> <h2>Jiro</h2> <span class="input input--jiro"> <input class="input__field input__field--jiro" type="text" id="input-10"/> <label class="input__label input__label--jiro" for="input-10"> <span class="input__label-content input__label-content--jiro">Cat's Name</span> </label> </span> <span class="input input--jiro"> <input class="input__field input__field--jiro" type="text" id="input-11"/> <label class="input__label input__label--jiro" for="input-11"> <span class="input__label-content input__label-content--jiro">Dog's Name</span> </label> </span> <span class="input input--jiro"> <input class="input__field input__field--jiro" type="text" id="input-12"/> <label class="input__label input__label--jiro" for="input-12"> <span class="input__label-content input__label-content--jiro">Hamster's Name</span> </label> </span> </section> <section class="content"> <h2>Minoru</h2> <span class="input input--minoru"> <input class="input__field input__field--minoru" type="text" id="input-13"/> <label class="input__label input__label--minoru" for="input-13"> <span class="input__label-content input__label-content--minoru">First Name</span> </label> </span> <span class="input input--minoru"> <input class="input__field input__field--minoru" type="text" id="input-14"/> <label class="input__label input__label--minoru" for="input-14"> <span class="input__label-content input__label-content--minoru">Middle Name</span> </label> </span> <span class="input input--minoru"> <input class="input__field input__field--minoru" type="text" id="input-15"/> <label class="input__label input__label--minoru" for="input-15"> <span class="input__label-content input__label-content--minoru">Last Name</span> </label> </span> </section> <section class="content bgcolor-5"> <h2>Yoko</h2> <span class="input input--minoru"> <input class="input__field input__field--yoko" type="text" id="input-16"/> <label class="input__label input__label--yoko" for="input-16"> <span class="input__label-content input__label-content--yoko">Street</span> </label> </span> <span class="input input--minoru"> <input class="input__field input__field--yoko" type="text" id="input-17"/> <label class="input__label input__label--yoko" for="input-17"> <span class="input__label-content input__label-content--yoko">City</span> </label> </span> <span class="input input--minoru"> <input class="input__field input__field--yoko" type="text" id="input-18"/> <label class="input__label input__label--yoko" for="input-18"> <span class="input__label-content input__label-content--yoko">Region</span> </label> </span> </section> <section class="content"> <h2>Hideo</h2> <span class="input input--hideo"> <input class="input__field input__field--hideo" type="text" id="input-41"/> <label class="input__label input__label--hideo" for="input-41"> <i class="fa fa-fw fa-user icon icon--hideo"></i> <span class="input__label-content input__label-content--hideo">Username</span> </label> </span> <span class="input input--hideo"> <input class="input__field input__field--hideo" type="text" id="input-42"/> <label class="input__label input__label--hideo" for="input-42"> <i class="fa fa-fw fa-envelope icon icon--hideo"></i> <span class="input__label-content input__label-content--hideo">Email</span> </label> </span> <span class="input input--hideo"> <input class="input__field input__field--hideo" type="text" id="input-43"/> <label class="input__label input__label--hideo" for="input-43"> <i class="fa fa-fw fa-lock icon icon--hideo"></i> <span class="input__label-content input__label-content--hideo">Password</span> </label> </span> </section> <section class="content bgcolor-3"> <h2>Kyo</h2> <span class="input input--kyo"> <input class="input__field input__field--kyo" type="text" id="input-19"/> <label class="input__label input__label--kyo" for="input-19"> <span class="input__label-content input__label-content--kyo">What's your email?</span> </label> </span> </section> <section class="content bgcolor-4"> <h2>Akira</h2> <span class="input input--akira"> <input class="input__field input__field--akira" type="text" id="input-22"/> <label class="input__label input__label--akira" for="input-22"> <span class="input__label-content input__label-content--akira">First Name</span> </label> </span> <span class="input input--akira"> <input class="input__field input__field--akira" type="text" id="input-23"/> <label class="input__label input__label--akira" for="input-23"> <span class="input__label-content input__label-content--akira">Last Name</span> </label> </span> <span class="input input--akira"> <input class="input__field input__field--akira" type="text" id="input-24"/> <label class="input__label input__label--akira" for="input-24"> <span class="input__label-content input__label-content--akira">Maiden Name</span> </label> </span> </section> <section class="content"> <h2>Ichiro</h2> <span class="input input--ichiro"> <input class="input__field input__field--ichiro" type="text" id="input-25"/> <label class="input__label input__label--ichiro" for="input-25"> <span class="input__label-content input__label-content--ichiro">Bird's Color</span> </label> </span> <span class="input input--ichiro"> <input class="input__field input__field--ichiro" type="text" id="input-26"/> <label class="input__label input__label--ichiro" for="input-26"> <span class="input__label-content input__label-content--ichiro">Wing Span</span> </label> </span> <span class="input input--ichiro"> <input class="input__field input__field--ichiro" type="text" id="input-27"/> <label class="input__label input__label--ichiro" for="input-27"> <span class="input__label-content input__label-content--ichiro">Beak Length</span> </label> </span> </section> <section class="content bgcolor-6"> <h2>Juro</h2> <span class="input input--juro"> <input class="input__field input__field--juro" type="text" id="input-28"/> <label class="input__label input__label--juro" for="input-28"> <span class="input__label-content input__label-content--juro">First Name</span> </label> </span> <span class="input input--juro"> <input class="input__field input__field--juro" type="text" id="input-29"/> <label class="input__label input__label--juro" for="input-29"> <span class="input__label-content input__label-content--juro">Last Name</span> </label> </span> <span class="input input--juro"> <input class="input__field input__field--juro" type="text" id="input-30"/> <label class="input__label input__label--juro" for="input-30"> <span class="input__label-content input__label-content--juro">Maiden Name</span> </label> </span> </section> <section class="content bgcolor-4"> <h2>Madoka</h2> <span class="input input--madoka"> <input class="input__field input__field--madoka" type="text" id="input-31"/> <label class="input__label input__label--madoka" for="input-31"> <svg class="graphic graphic--madoka" width="100%" height="100%" viewBox="0 0 404 77" preserveAspectRatio="none"> <path d="m0,0l404,0l0,77l-404,0l0,-77z"/> </svg> <span class="input__label-content input__label-content--madoka">Frequency</span> </label> </span> <span class="input input--madoka"> <input class="input__field input__field--madoka" type="text" id="input-32"/> <label class="input__label input__label--madoka" for="input-32"> <svg class="graphic graphic--madoka" width="100%" height="100%" viewBox="0 0 404 77" preserveAspectRatio="none"> <path d="m0,0l404,0l0,77l-404,0l0,-77z"/> </svg> <span class="input__label-content input__label-content--madoka">Weight</span> </label> </span> <span class="input input--madoka"> <input class="input__field input__field--madoka" type="text" id="input-33"/> <label class="input__label input__label--madoka" for="input-33"> <svg class="graphic graphic--madoka" width="100%" height="100%" viewBox="0 0 404 77" preserveAspectRatio="none"> <path d="m0,0l404,0l0,77l-404,0l0,-77z"/> </svg> <span class="input__label-content input__label-content--madoka">Strength</span> </label> </span> </section> <section class="content"> <h2>Kaede</h2> <span class="input input--kaede"> <input class="input__field input__field--kaede" type="text" id="input-35"/> <label class="input__label input__label--kaede" for="input-35"> <span class="input__label-content input__label-content--kaede">First Name</span> </label> </span> <span class="input input--kaede"> <input class="input__field input__field--kaede" type="text" id="input-36"/> <label class="input__label input__label--kaede" for="input-36"> <span class="input__label-content input__label-content--kaede">Last Name</span> </label> </span> <span class="input input--kaede"> <input class="input__field input__field--kaede" type="text" id="input-37"/> <label class="input__label input__label--kaede" for="input-37"> <span class="input__label-content input__label-content--kaede">Website</span> </label> </span> </section> <section class="content bgcolor-8"> <h2>Isao</h2> <span class="input input--isao"> <input class="input__field input__field--isao" type="text" id="input-38"/> <label class="input__label input__label--isao" for="input-38" data-content="First Name"> <span class="input__label-content input__label-content--isao">First Name</span> </label> </span> <span class="input input--isao"> <input class="input__field input__field--isao" type="text" id="input-39"/> <label class="input__label input__label--isao" for="input-39" data-content="Middle Name"> <span class="input__label-content input__label-content--isao">Middle Name</span> </label> </span> <span class="input input--isao"> <input class="input__field input__field--isao" type="text" id="input-40"/> <label class="input__label input__label--isao" for="input-40" data-content="Last Name"> <span class="input__label-content input__label-content--isao">Last Name</span> </label> </span> </section> </div> <!-- /container --> <script> /*! * classie - class helper functions 封装js * from bonzo https://github.com/ded/bonzo * * classie.has( elem, 'my-class' ) -> true/false * classie.add( elem, 'my-new-class' ) * classie.remove( elem, 'my-unwanted-class' ) * classie.toggle( elem, 'my-class' ) */ /*jshint browser: true, strict: true, undef: true */ /*global define: false */ (function (window) { 'use strict'; // class helper functions from bonzo https://github.com/ded/bonzo function classReg(className) { return new RegExp("(^|\s+)" + className + "(\s+|$)"); } // classList support for class management // altho to be fair, the api sucks because it won't accept multiple classes at once var hasClass, addClass, removeClass; if ('classList' in document.documentElement) { hasClass = function (elem, c) { return elem.classList.contains(c); }; addClass = function (elem, c) { elem.classList.add(c); }; removeClass = function (elem, c) { elem.classList.remove(c); }; } else { hasClass = function (elem, c) { return classReg(c).test(elem.className); }; addClass = function (elem, c) { if (!hasClass(elem, c)) { elem.className = elem.className + ' ' + c; } }; removeClass = function (elem, c) { elem.className = elem.className.replace(classReg(c), ' '); }; } function toggleClass(elem, c) { var fn = hasClass(elem, c) ? removeClass : addClass; fn(elem, c); } var classie = { // full names hasClass: hasClass, addClass: addClass, removeClass: removeClass, toggleClass: toggleClass, // short names has: hasClass, add: addClass, remove: removeClass, toggle: toggleClass }; // transport if (typeof define === 'function' && define.amd) { // AMD define(classie); } else { // browser global window.classie = classie; } })(window); </script> <script> (function () { // trim polyfill : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim if (!String.prototype.trim) { (function () { // Make sure we trim BOM and NBSP var rtrim = /^[suFEFFxA0]+|[suFEFFxA0]+$/g; String.prototype.trim = function () { return this.replace(rtrim, ''); }; })(); } [].slice.call(document.querySelectorAll('input.input__field')).forEach(function (inputEl) { // in case the input is already filled.. if (inputEl.value.trim() !== '') { classie.add(inputEl.parentNode, 'input--filled'); } // events: inputEl.addEventListener('focus', onInputFocus); inputEl.addEventListener('blur', onInputBlur); }); function onInputFocus(ev) { classie.add(ev.target.parentNode, 'input--filled'); } function onInputBlur(ev) { if (ev.target.value.trim() === '') { classie.remove(ev.target.parentNode, 'input--filled'); } } })(); </script> </body> </html>