How does css remove the top border?

This article introduces the relevant knowledge of "how to remove the upper frame of css". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Css to remove the upper border of the method: 1, the use of "border-top:none;" statement to remove; 2, the use of "border-top:transparent;" statement on the border color set to transparent; 3, the use of "border-top:0;" statement on the border width is set to 0.

The operating environment of this tutorial: windows7 system, CSS3&&HTML5 version, Dell G3 computer.

When we use the border property to set the border, we will set the top and bottom and left and right borders all at once:

Div {height: 50px; border: 1px solid red;}

Sometimes, we don't need the upper frame, so how do we get rid of it? You can take advantage of the border-top property.

Method 1:

Div {height: 50px; border: 1px solid red; border-top:none;}

Method 2:

Div {height: 50px; border: 1px solid red; border-top:transparent;}

Method 3:

Div {height: 50px; border: 1px solid red; border-top:0;}

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