Day 31: logical border properties
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It’s time to get me up to speed with modern CSS. There’s so much new in CSS that I know too little about. To change that I’ve started #100DaysOfMoreOrLessModernCSS. Why more or less modern CSS? Because some topics will be about cutting-edge features, while other stuff has been around for quite a while already, but I just have little to no experience with it.
Just like for margin
or padding
, there are also logical property variations for border
properties.
Originally there were 4 shorthand properties we could use for defining borders.
border
- 1, 2, or 3 values (size, style, color)border-width
- 1, 2, 3, or 4 size values for the different sidesborder-style
- 1, 2, 3, or 4 style values for the different sidesborder-color
- 1, 2, 3, or 4 color values for the different sides
And we could do the same for each physical side (top, right, bottom, left).
border-left
- 1, 2, or 3 valuesborder-left-width
- A size valueborder-left-style
- A style valueborder-left-color
- A color value
Now there are a couple of more properties:
border-block
border-block
- 1, 2, or 3 values (size, style, color)border-block-width
- 1 or 2 size values (a single value for both sides or one for each)border-block-style
- 1 or 2 style valuesborder-block-color
- 1 or 2 color values
div {
border-block: solid;
}
div {
border-block: 20px solid aqua;
}
div {
border-block-color: green;
border-block-width: 10px 20px;
border-block-style: dashed dotted;
}
We can do the same for each individual side (block-start and block-end).
border-block-start
- 1, 2, or 3 valuesborder-block-start-width
- A size valueborder-block-start-style
- A style valueborder-block-start-color
- A color value
div {
border-block-start: 2em solid red;
}
div {
border-block-end-color: blue;
border-block-end-width: 1rem;
border-block-end-style: dashed;
}
border-inline
border-inline
- 1, 2, or 3 valuesborder-inline-width
- 1 or 2 size valuesborder-inline-style
- 1 or 2 style valuesborder-inline-color
- 1 or 2 color values
div {
border-inline: solid;
}
div {
border-inline: 20px solid aqua;
}
div {
border-inline-color: green;
border-inline-width: 10px 20px;
border-inline-style: dashed dotted;
}
We can do the same for each individual side (inline-start and inline-end).
border-inline-start
- 1, 2, or 3 valuesborder-inline-start-width
- A size valueborder-inline-start-style
- A style valueborder-inline-start-color
- A color value
div {
border-inline-start: 2em solid red;
}
<div>
border-inline-start
</div>
<div dir="rtl">
border-inline-start
</div>
div {
border-inline-end-color: blue;
border-inline-end-width: 1rem;
border-inline-end-style: dashed;
}
Further reading
- CSS Logical Properties and Values (MDN)
- Day 2: logical properties
- Day 3: logical property shorthands
- Day 44: logical floating and clearing
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Overview: 100 Days Of More Or Less Modern CSS