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This article mainly shows you "what is the meaning of bootstrap grid system", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what does bootstrap grid system mean" this article.

Grid system is the core of Bootstrap. It is because of the existence of grid system that Bootstrap can have such a powerful responsive layout scheme.

The following is an explanation in the official document:

Bootstrap provides a responsive, mobile device-first streaming grid system that automatically divides into up to 12 columns as the screen or viewport (viewport) size increases. Contains predefined classes for simple layout options, as well as powerful hybrid classes for generating more semantic layouts.

If we understand this passage, we can find that the most important part is mobile device priority, so what is mobile device priority?

The basic CSS code for Bootstrap starts with small-screen devices (such as mobile devices, tablets) by default, and then uses media queries to extend components and grids on large-screen devices (such as laptops, desktops).

The strategy is as follows:

Content: decide what is most important.

Layout: give priority to designing smaller widths.

Progressive enhancement: elements are added as the screen size increases.

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