CSS do not use sample analysis named by Id casually

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In the DIV CSS agency, the CSS code can not be named by ID, and the abuse of css ID is frugal. The use of the ID named by CSS is indicated as follows:

Id is unique in JS (unique in the use of id) and cannot be used frequently (it is true that some readers that have been repeatedly used can also be malformed but grammatical fallacy), while the application of class determiners is about repeated use, other id priority and class, so id should be used on demand, not abused.

There is a special meaning of CSS5 introduction, contrast big structural organs, with only the place may use id naming, how id and class naming composition of primary and secondary points.

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