CSS Logical Properties
CSS Logical Properties 관련
A property like margin-left seems fairly logical, but as Manuel Rego Casasnovas says:
Imagine that you have some right-to-left (RTL) content on your website your left might be probably the physical right, so if you are usually setting
margin-left: 100pxfor some elements, you might want to replace that withmargin-right: 100px.
Direction, writing mode, and even flexbox all have the power to flip things around and make properties less logical and more difficult to maintain than you’d hope. Now we’ll have margin-inline-start for that. The full list is:
margin-{block,inline}-{start,end}padding-{block,inline}-{start,end}border-{block,inline}-{start,end}-{width,style,color}
Manuel gets into all the browser support details.
Rachel Andrew also explains the logic:
Info
… these values have moved away from the underlying assumption that content on the web maps to the physical dimensions of the screen, with the first word of a sentence being top left of the box it is in. The order of lines in grid-area makes complete sense if you had never encountered the existing way that we set these values in a shorthand.
Here’s the logical properties and how they map to existing properties in a default left to right nothing-else-happening sort of way.
| Property | Logical Property |
|---|---|
margin-top | margin-block-start |
margin-left | margin-inline-start |
margin-right | margin-inline-end |
margin-bottom | margin-block-end |
| Property | Logical Property |
|---|---|
padding-top | padding-block-start |
padding-left | padding-inline-start |
padding-right | padding-inline-end |
padding-bottom | padding-block-end |
| Property | Logical Property |
|---|---|
| `border-top{-size | style |
| `border-left{-size | style |
| `border-right{-size | style |
| `border-bottom{-size | style |
| Property | Logical Property |
|---|---|
top | inset-block-start |
left | inset-inline-start |
right | inset-inline-end |
bottom | inset-block-end |
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