CSS (3), css

CSS (3), css
CSS thorough research (3)
Github pages blog CSS thorough research (3)-floating, positioning 1. Floating floatI. Definition and rules

Float is set to none by default, which corresponds to the standard stream. When

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Then, the element will tighten to the left side of its parent element, exit from the standard stream, and the width will not be extended to fill the parent container, but determined based on its own content.

II. Demo rules

Prepare the code '''