Understanding of web standards and W3C?

• web Standards can be divided into structures 、 Performance and behavior .

  • The structure mainly includes HTML Label composition . Maybe it's more popular , On the page body The tags we write are for the structure of the page .
  • Performance means css Style sheets , adopt css Can be the structure of the page label more aesthetic .
  • Behavior refers to the interaction between the page and the user , At the same time, the page structure or performance changes , There are mainly js form .

• web The standard is to separate the three parts , Make it more modular . But generally when there is behavior , There will be structural or performance changes , It also makes the boundaries of the three not so clear .W3C Yes web The standard puts forward the requirements of standardization , That is, some code specifications in actual programming ： It includes the following points

  • 1. For structural requirements ：（ Tag specification can improve the efficiency of page grabbing of search engine , Yes SEO Very helpful
    • 1） Label letters in lowercase
    • 2） The label should be closed
    • 3） Tags are not allowed to be nested at will
  • 2. about css and js Come on
    • 1） Try to use the outer chain css Style sheets and js Script . It's the structure 、 Performance and behavior are divided into three parts , Conform to specifications . At the same time, improve the rendering speed of the page , Improve the user experience .
    • 2） Try to use as few style sheets as possible , To separate structure from performance , Labeled id and class Attribute naming should be done according to the meaning of the text , The fewer Tags , The faster it loads , Improved user experience , Code maintenance is simple , Easy to change
    • 3） There is no need to change the content of the page , You can provide a printed version without copying the content , Improve website usability .

* Lu Rongtao front-end learning exchange Q Group 858752519
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