01. Web Front-end era: HTML5 + CSS3 getting started series ~ First recognized HTML5 and css3html5

01. Web Front-end era: HTML5 + CSS3 getting started series ~ First recognized HTML5 and css3html5

Web Front-end era: HTML5 + CSS3 entry series: http://www.cnblogs.com/dunitian/p/5121725.html

<! -- The document type declaration. html indicates the html5 document type -->

<! DOCTYPE html>

<! -- Character encoding, charset = "UTF-8" -->

<Meta charset = "UTF-8"/>

 

1. Omit quotation marks:

When the attribute values do not include <,>, =, single quotation marks, double quotation marks, or empty strings, the quotation marks on both sides of the attribute can be omitted: <input type = text>

 

2. omitted attribute values

Attribute with a Boolean value (for example, disabled, readonly). Only the write attribute value indicates true: <input type = checkbox checked>