What does top mean in css

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In css, top means "top" and "distance from the top", and the top attribute is used in conjunction with the position attribute to set the distance from the top of the positioning element. The top attribute can define the offset between the upper outer margin boundary of a positioning element and the upper boundary of its containing block, and the top attribute works only on the positioning element.

The operating environment of this tutorial: windows10 system, CSS3&&HTML5 version, Dell G3 computer.

In css, top means "top", and the top attribute is used to set the distance from the top of the positioning element.

The top attribute specifies the top edge of the element. This attribute defines the offset between the upper outer margin boundary of an positioning element and the upper boundary of its containing block.

Note: if the value of the "position" property is "static", setting the "top" property will have no effect.

The syntax is as follows:

Position:absolute; / / this is necessary for top and left to work. Top: 10px; / / 10 pixels away from the top, just want to move 10 pixels below.

Examples are as follows:

Img {position:absolute;top:30px;}

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Output result:

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