web前端|H5教程
HTML5，CSS3，注册登录表单
web前端-H5教程
分步骤的登录注册表单现在也比较多，主要是能提高用户体验，用户可以有选择性的填写相应的表单信息，不至于让用户看到一堆表单望而却步。今天和大家分享的就是一款基于HTML5和CSS3的分步骤注册登录表单，外观不用说，非常漂亮。你看一下DEMO就知道了。
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接下来我们要来一起看看实现的过程是怎样的。代码有点复杂，主要由HTML代码、CSS3代码以及Javascript代码组成。
HTML代码：
Account Setup Social Profiles Personal Details
HTML代码看起来很多，但是很简单，主要是描述了一form表单。
CSS代码：
/*form styles*/#msform { width: 400px; margin: 50px auto; text-align: center; position: relative;}#msform fieldset { background: white; border: 0 none; border-radius: 3px; box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4); padding: 20px 30px; box-sizing: border-box; width: 80%; margin: 0 10%; /*stacking fieldsets above each other*/ position: absolute;}/*Hide all except first fieldset*/#msform fieldset:not(:first-of-type) { display: none;}/*inputs*/#msform input, #msform textarea { padding: 15px; border: 1px solid #ccc; border-radius: 3px; margin-bottom: 10px; width: 100%; box-sizing: border-box; font-family: montserrat; color: #2C3E50; font-size: 13px;}/*buttons*/#msform .action-button { width: 100px; background: #27AE60; font-weight: bold; color: white; border: 0 none; border-radius: 1px; cursor: pointer; padding: 10px 5px; margin: 10px 5px;}#msform .action-button:hover, #msform .action-button:focus { box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;}/*headings*/.fs-title { font-size: 15px; text-transform: uppercase; color: #2C3E50; margin-bottom: 10px;}.fs-subtitle { font-weight: normal; font-size: 13px; color: #666; margin-bottom: 20px;}/*progressbar*/#progressbar { margin-bottom: 30px; overflow: hidden; /*CSS counters to number the steps*/ counter-reset: step;}#progressbar li { list-style-type: none; color: white; text-transform: uppercase; font-size: 9px; width: 33.33%; float: left; position: relative;}#progressbar li:before { content: counter(step); counter-increment: step; width: 20px; line-height: 20px; display: block; font-size: 10px; color: #333; background: white; border-radius: 3px; margin: 0 auto 5px auto;}/*progressbar connectors*/#progressbar li:after { content: \; width: 100%; height: 2px; background: white; position: absolute; left: -50%; top: 9px; z-index: -1;/*put it behind the numbers*/} #progressbar li:first-child:after { /*connector not needed before the first step*/ content: none; }/*marking active/completed steps green*//*The number of the step and the connector before it = green*/#progressbar li.active:before, #progressbar li.active:after{ background: #27AE60; color: white;}
这里我们只是将渲染表单的CSS代码贴了出来，这让我们的表单看起来非常清新自然。另外要说明的一点是，这里我们利用了CSS3的:before属性。
最后是Javascript代码，可以实现注册表单的步骤跳转。
Javascript代码：
var current_fs, next_fs, previous_fs; //fieldsetsvar left, opacity, scale; //fieldset properties which we will animatevar animating; //flag to prevent quick multi-click glitches$(".next").click(function(){ if(animating) return false; animating = true; current_fs = $(this).parent(); next_fs = $(this).parent().next(); //activate next step on progressbar using the index of next_fs $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active"); //show the next fieldset next_fs.show();//hide the current fieldset with style current_fs.animate({opacity: 0}, { step: function(now, mx) { //as the opacity of current_fs reduces to 0 - stored in "now" //1. scale current_fs down to 80% scale = 1 - (1 - now) * 0.2; //2. bring next_fs from the right(50%) left = (now * 50)+"%"; //3. increase opacity of next_fs to 1 as it moves in opacity = 1 - now; current_fs.css({ ransform: scale(+scale+)}); next_fs.css({left: left, opacity: opacity}); }, duration: 800, complete: function(){ current_fs.hide(); animating = false; }, //this comes from the custom easing plugin easing: easeInOutBack });});$(".previous").click(function(){ if(animating) return false; animating = true; current_fs = $(this).parent(); previous_fs = $(this).parent().prev(); //de-activate current step on progressbar $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active"); //show the previous fieldset previous_fs.show();//hide the current fieldset with style current_fs.animate({opacity: 0}, { step: function(now, mx) { //as the opacity of current_fs reduces to 0 - stored in "now" //1. scale previous_fs from 80% to 100% scale = 0.8 + (1 - now) * 0.2; //2. take current_fs to the right(50%) - from 0% left = ((1-now) * 50)+"%"; //3. increase opacity of previous_fs to 1 as it moves in opacity = 1 - now; current_fs.css({left: left}); previous_fs.css({ ransform: scale(+scale+), opacity: opacity}); }, duration: 800, complete: function(){ current_fs.hide(); animating = false; }, //this comes from the custom easing plugin easing: easeInOutBack });});$(".submit").click(function(){ return false;})
这里我们可以看到，利用jQuery代码变得非常简洁。主要是3个事件：next、previous、submit，同时在next和previous时利用jQuery实现淡入淡出的动画效果，是不是很迷人？最后你也可以下载源代码。
