I have to admire the Google Chrome team for using HTML5 and CSS3 to implement a very beautiful online e-book: "20 Things About Browsers and the Internet".
Visit address: http://www.20thingsilearned.com
It has been a long time since this e-book was released, but I still like it after reading it today. We can switch e-book pages back and forth without refreshing the page, which is the perfect embodiment of OPOA (One Page One Application).
I am currently learning about the history API, so I am particularly interested in how they use window.history.pushState() and window.history.replaceState() to switch between pages without refreshing.
I checked some information today and basically have a basic understanding of the history API.
The first thing to say is that history is the overall situation, that is, window.history. You must be familiar with this variable name, because you can often see the JavaScript code using window.history.back() or window.history.go(-1) to return the previous page.
So history is not a new thing. In the era of HTML4, we can use these attributes and methods of it:
length: the number of records in the history stack.
back(): Return to the previous page.
forward(): Forward to the next page.
go([delta]): delta is a number. If it is not written or is 0, refresh this page; if it is a positive number, it will advance to the corresponding number of pages; if it is a negative number, it will go back to the corresponding number of pages.
Now, HTML5 adds the following 2 methods:
pushState(data, title [, url]): Add a record to the top of the history stack. data is an object or null, which will be passed as the state attribute of the parameter when the window's popstate event (window.onpopstate) is triggered; title is the title of the page, but all current browsers ignore this parameter; url is the page's URL, if not written, it will be the current page.
replaceState(data, title [, url]): Change the history of the current page. The parameters are the same as above. This change does not access the URL. However, it is currently only supported by Safari 5.0+, Chrome 8.0+, Firefox 4.0+ and iOS 4.2.1+. If you want to be compatible with old browsers, you can try History.js, and it also fixes some bugs.
Of course, on mobile platforms, we can boldly try the history API of html5. The built-in browsers of ios3.0+ and Android2.0+ platforms are perfect for history. Using it, we can make web apps more like native apps.
Below, I recommend a few articles:
.Manipulating the browser history
.Session history and navigation
.Manipulating History for Fun & Profit

html5的div元素默认一行不可以放两个。div是一个块级元素,一个元素会独占一行,两个div默认无法在同一行显示;但可以通过给div元素添加“display:inline;”样式,将其转为行内元素,就可以实现多个div在同一行显示了。

html5中列表和表格的区别:1、表格主要是用于显示数据的,而列表主要是用于给数据进行布局;2、表格是使用table标签配合tr、td、th等标签进行定义的,列表是利用li标签配合ol、ul等标签进行定义的。

固定方法:1、使用header标签定义文档头部内容,并添加“position:fixed;top:0;”样式让其固定不动;2、使用footer标签定义尾部内容,并添加“position: fixed;bottom: 0;”样式让其固定不动。

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

html5中不支持的标签有:1、acronym,用于定义首字母缩写,可用abbr替代;2、basefont,可利用css样式替代;3、applet,可用object替代;4、dir,定义目录列表,可用ul替代;5、big,定义大号文本等等。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

html5是指超文本标记语言(HTML)的第五次重大修改,即第5代HTML。HTML5是Web中核心语言HTML的规范,用户使用任何手段进行网页浏览时看到的内容原本都是HTML格式的,在浏览器中通过一些技术处理将其转换成为了可识别的信息。HTML5由不同的技术构成,其在互联网中得到了非常广泛的应用,提供更多增强网络应用的标准机。

3种取消方法:1、给td元素添加“border:none”无边框样式即可,语法“td{border:none}”。2、给td元素添加“border:0”样式,语法“td{border:0;}”,将td边框的宽度设置为0即可。3、给td元素添加“border:transparent”样式,语法“td{border:transparent;}”,将td边框的颜色设置为透明即可。


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