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In this article Xiaobian for you to introduce in detail "HTML on class content space multi-class name of the problem which", detailed content, clear steps, details handled properly, I hope that this "HTML on class content space multi-class name of the problem which" article can help you solve doubts, the following with the editor's ideas slowly in-depth, together to learn new knowledge bar.

Q: what does a class definition like class= "info fl" mean?

Answer: when the spaces here are separated, they represent two class names, info and fl.

Q: what's the point of writing like this? Isn't it okay to put them all in the same class name?

Answer: one is sure, but writing this way focuses more on the modular design of CSS, which can reduce the repetitive code of css and improve the reusability of classes.

Q: so how many class names can you put in class at a time? (separated by spaces)

A: there is no limit, but there are generally no more than 10. At least I haven't seen much of it.

Q: if more than one is written at the same time, what is their priority?

A: if there are duplicate attribute definitions among them, then the latter will overwrite the previous one.

Q: class can be written like this. What about id? Is that okay?

A: yes, but it doesn't make any sense, because a page id does not allow repetition, so there is no reusability.

What are the characteristics of html 1, simplicity: hypertext markup language version upgrade using superset mode, thus more flexible and convenient, suitable for beginner front-end developers to use.

2. Extensibility: the wide application of hypertext markup language brings the requirements of strengthening functions and increasing identifiers. Hypertext markup language adopts the way of subclass elements to ensure the expansion of the system.

3. Platform independence: hypertext markup language can be used on a wide range of platforms, which is one of the reasons why the World wide Web is so popular.

4. Versatility: HTML is the universal language of the network, which allows web producers to create complex pages that combine text and pictures, which can be viewed by anyone else on the Internet, no matter what type of computer or browser they are using.

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