How to remove the top border in css

How to remove the top border in css: 1. Use the "border-top:none;" statement to remove it; 2. Use the "border-top:transparent;" statement to set the border color of the top border to transparent; 3. , use the "border-top:0;" statement to set the border width of the top border to 0.

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

When we use the border attribute to set the border, we will set all four borders at once:

Sometimes, we don’t need The upper border, then how to remove it? You can use the border-top attribute.

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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