How come eliminating the border's thickness and color while preserving the border's width results in the disappearance of the border

Can you explain why removing border thickness and color, while keeping the border width, ends up removing the border itself?

css

h1
{
  color: magenta;
  padding: 20px;
  border: solid #000 5px; --> border: 5px;
  margin:10px;
}

html

<body>
  <h1> This is a test </h1>
</body>

https://i.sstatic.net/PSkow.png https://i.sstatic.net/EM6Jg.png

code: https://jsfiddle.net/a7hoxp5f/3/

Answer №1

When you use the following declaration...

 border: solid #000 5px;

...it is essentially a shortcut for the longer version shown below:

  border-style: solid;
  border-width: 5px;
  border-color: #000;

If you do not include solid in the first declaration, it will default to setting the border-style property to its default value. The default value for border-style is none, and it is defined as follows in the CSS standards:

none

No border will be displayed. Color and width properties are ignored, resulting in a border with zero width.

Answer №2

One must remember that the border property is a shorthand for:

border-width
border-style
border-color

Therefore, removing any of these parts will hinder its functionality. It is important to reference the official documentation for clarity.

https://developer.mozilla.org/en-US/docs/Web/CSS/border

Answer №3

When the border-style is set to None, it results in the removal of the border itself.

This action removes both the thickness and color of the border.

It's important to note that solid refers to the style of the border, not its thickness.

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