CSS block-level formatting context BFC

This article mainly introduces the CSS block-level formatting context BFC, has a certain reference value, now share to everyone, the need for friends can refer to

BFC Rendering Area

This area is created by an HTML element, and the following elements create a BFC region inside it

1. Root element

2. Floating and absolute positioning elements

3.overflow not equal to visible block box

The role of creating BFC is applied to its child elements in separate BFC areas, and they do not interfere with each other when rendering

Creates a BFC element that isolates its internal and external connections, and the internal rendering does not affect the external

Specific rules:

1. Create the BFC element, its automatic height needs to calculate the floating element

2. Create a BFC element whose bounding box does not overlap with floating elements

3. Create an BFC element that does not overlap its child elements with margin

Part of the display value is also automatically created BFC

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