What are the core technologies of css

The core technologies of css are: 1. Float, which allows the original elements to break away from the document flow and realize left and right arrangement; 2. Positioning, relative even if offset, the original position is still there; 3. Line height [line -height], the default font capitalization is 16px.

The operating environment of this tutorial: windows10 system, css3 version, DELL G3 computer. This method is suitable for all brands of computers.

Recommended: css video tutorial

The core technologies of css are:

1, floating float

• Let the original elements break away from the document flow and realize left and right arrangement.

• Do not set the width to the minimum width (the width of the internal element)

• float will be pressed on top of block-level elements, but not on top of inline elements; nor on top of text in block-level elements

• Side effects of float/Three methods of clearing float

2, Position position

relative

• Even if it is offset, the original position is still

• offset relative to itself

absolute

• Offset, the position will be gone

• Offset relative to the nearest relative/absolute parent element

3, line-height

The default font capitalization is 16px;

4, the alignment of divs on the same line: baseline alignment

• If there is text, the bottom of the text is the baseline

• If there is an inline element, the bottom of the inline element is the baseline

• If there is no text, the bottom line of the div is the baseline

Note: Set CSS style by class inheritance

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