那一天终于到了。您终于厌倦了长篇幅的滚动文本,想要尝试新的内容形式。优雅的照片。体积较小。将长滚动条截断成整齐的小矩形并将其绑定在一起。我将这项发明称为“图书”。
借助强大的 CSS 区域(CanIUse,前往 chrome://flags
并启用 CSS 区域)和 CSS 3D 转换,现代浏览器终于可以使用尖端的图书技术了。您只需几行 JavaScript 代码和大量 CSS 代码即可。
首先,我们来定义图书结构。图书由页面组成,页面由两面组成。侧边包含图书内容:
<div class="book">
<div> <!-- first page -->
<div> <!-- front cover -->
# My Fancy Book
</div>
<div> <!-- backside of cover -->
# By Me I. Myself
## 2012 Bogus HTML Publishing Ltd
</div>
</div>
<!-- content pages -->
<div>
<!-- front side of page -->
<div class="book-pages"></div>
<!-- back side of page -->
<div class="book-pages"></div>
</div>
<div>
<div class="book-pages"></div>
<div class="book-pages"></div>
</div>
<div>
<div class="book-pages"></div>
<div class="book-pages"></div>
</div>
</div>
我们将使用 CSS 区域将图书文本流入图书页面。不过,我们首先需要图书文本。
<span id="book-content">
blah blah blah ...
</span>
现在,我们已经编写好了图书,接下来来定义一下流程 CSS。我将“+”字符用作供应商前缀占位符,将其替换为 WebKit 浏览器的 -webkit-
、Firefox 的 -moz-
等:
#book-content {
+flow-into: book-text-flow;
}
.book-pages {
+flow-from: book-text-flow;
}
现在,#book-content span 中的内容将改为进入 .book-pages div。不过,这本书很差。为了获得更像图书的图书,我们必须踏上征途。我们的旅程将跨越 CSS 转换的彩虹桥,前往 JavaScript 的齿轮王国。在机械仙王的宫殿中,我们将施展史诗般的转场魔法,并获得传说中用于控制地表界面的三把钥匙。
彩虹桥的守护者向我们传授了时尚结构选择器的智慧,以便我们将 HTML 图书结构转换为更具图书形式的形式:
html {
width: 100%;
height: 100%;
}
body {
/* The entire body is clickable area. Let the visitor know that. */
cursor: pointer;
width: 100%;
height: 100%;
/* Set the perspective transform for the page so that our book looks 3D. */
+perspective: 800px;
/* Use 3D for body, the book itself and the page containers. */
+transform-style: preserve-3d;
}
.book {
+transform-style: preserve-3d;
position: absolute;
}
/* Page containers, contain the two sides of the page as children. */
.book > div {
+transform-style: preserve-3d;
position: absolute;
}
/* Both sides of a page. These are flat inside the page container, so no preserve-3d. */
.book > div > div {
/* Fake some lighting with a gradient. */
background: +linear-gradient(-45deg, #ffffff 0%, #e5e5e5 100%);
width: 600px;
height: 400px;
overflow: hidden;
/* Pad the page text a bit. */
padding: 30px;
padding-bottom: 80px;
}
/* Front of a page */
.book > div > div:first-child {
/* The front side of a page should be slightly above the back of the page. */
+transform: translate3d(0px, 0px, 0.02px);
/* Add some extra padding for the gutter. */
padding-left: 40px;
/* Stylish border in the gutter for visual effect. */
border-left: 2px solid #000;
}
/* Back of a page */
.book > div > div:last-child {
/* The back side of a page is flipped. */
+transform: rotateY(180deg);
padding-right: 40px;
border-right: 2px solid #000;
}
/* Front cover of the book */
.book > div:first-child > div:first-child {
/* The covers have a different color. */
background: +linear-gradient(-45deg, #8c9ccc 0%, #080f40 100%);
/* Put a border around the cover to make it cover the pages. */
border: 2px solid #000;
/* And center the cover. */
margin-left: -1px;
margin-top: -1px;
}
/* Back cover of the book */
.book > div:last-child > div:last-child {
background: +linear-gradient(-45deg, #8c9ccc 0%, #080f40 100%);
border: 2px solid #000;
margin-left: -1px;
margin-top: -1px;
}
这样为 HTML 创建了一种类似于纸张的样式,我们就来到了 JavaScript 王国的万亿齿轮大门。为了通过闸门,我们必须将平放的照片书折叠成合适的体积。为了让图书看起来更厚实,我们在 z 轴上稍微偏移了每个页面。
(function() {
var books = document.querySelectorAll('.book');
for (var i = 0; i < books.length; i++) {
var book = books[i];
var pages = book.childNodes;
for (var j = 0; j < pages.length; j++) {
if (pages[j].tagName == "DIV") {
setTransform(pages[j], 'translate3d(0px, 0px, ' + (-j) + 'px)');
}
}
}
})();
施展转场魔法来打动精灵之王并不是最难的调用。不过,结果让书页的翻页动画效果非常流畅。
.book > div {
+transition: 1s ease-in-out;
}
最后,为了让页面真正翻转,我们需要将事件本身绑定到我们的原因。
(function(){
// Get all the pages.
var pages = document.querySelectorAll('.book > div');
var currentPage = 0;
// Go to previous page when clicking on left side of window.
// Go to the next page when clicking on the right side.
window.onclick = function(ev) {
if (ev.clientX < window.innerWidth/2) {
previousPage();
} else {
nextPage();
}
ev.preventDefault();
};
var previousPage = function() {
if (currentPage > 0) {
currentPage--;
// Rotate the page to closed position and move it to its place in the closed page stack.
setTransform(pages[currentPage], 'translate3d(0px,0px,' + (-currentPage) + 'px) rotateY(0deg)');
}
};
var nextPage = function() {
if (currentPage < pages.length) {
// Rotate the page to open position and move it to its place in the opened stack.
setTransform(pages[currentPage], 'translate3d(0px,0px,' + currentPage + 'px) rotateY(-150deg)');
currentPage++;
}
};
})();
这样一来,我们就掌握了“书”技术,可以撤离上层世界水晶塔,远离其刺眼的光芒和上层世界枢纽的巨大蓝色恒星 Achenar 的猛烈核火。我们胜利地回到家中,高举着书本,准备迎接为我们举行的不可避免的一系列游行和庆祝活动。
您可以在线点击此处查看示例,并获取示例的完整源代码。如果您的浏览器中没有 CSS 区域,该示例将看起来非常破碎。在这种情况下,您可以改为尝试此示例。