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5.1.1 Font-relative Lengths: the em, ex, ch, rem units |
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ch-unit-001 |
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support for the ch unit
- The ch unit is equal to the used advance measure of the 0 (ZERO, U+0030) glyph found in the font used to render it.
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ch-unit-002 |
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the ch unit in vertical orientation
- In vertical upright, the ch unit is equal to the used vertical advance measure of the 0 (ZERO, U+0030) glyph found in the font used to render it.
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ch-unit-003 |
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support for the ch unit
- In vertical mixed, The ch unit is equal to the used horizontal advance measure of the 0 (ZERO, U+0030) glyph found in the font used to render it.
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ch-unit-004 |
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support for the ch unit
- In vertical sideways, The ch unit is equal to the used horizontal advance measure of the 0 (ZERO, U+0030) glyph found in the font used to render it.
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ch-unit-008 |
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ch unit in width (basic)
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ch-unit-009 |
= |
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ch unit in height (basic)
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ch-unit-010 |
= |
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ch unit in height with 'text-orientation: mixed'
- In this test, the ch unit is the advance width measure of the 0 (ZERO, U+0030) glyph.
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ch-unit-011 |
= |
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ch unit in height with 'text-orientation: upright'
- In this test, the ch unit is the advance height measure of the 0 (ZERO, U+0030) glyph.
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ch-unit-012 |
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ch unit in height with 'text-orientation: sideways'
- In this test, the ch unit is the advance width measure of the 0 (ZERO, U+0030) glyph.
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ch-unit-016 |
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support for the ch unit
- The ch unit is equal to 0em if the zero glyph's advance is 0.
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ch-unit-017 |
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support for the ch unit
- In vertical upright writing modes, the ch unit is equal to the vertical advance of the zero glyph.
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ch-units-vrl-001 |
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upright vertical writing mode and ch unit on table rows
- The font-metric dependent ch unit on table rows takes the writing mode (with upright text-orientation) into account, even though theses properties do not apply to that element.
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ch-units-vrl-002 |
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upright vertical writing mode and ch unit on table row groups
- The font-metric dependent ch unit on table row groups takes the writing mode (with upright text-orientatino) into account, even though these properties do not apply to that element.
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ch-units-vrl-003 |
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upright vertical writing mode and ch unit on table columns
- The font-metric dependent ch unit on table columns takes the writing mode (with upright orientation) into account, even though these properties do no apply to that element.
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ch-units-vrl-004 |
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upright vertical writing mode and ch unit on table column groups
- The font-metric dependent ch unit on table column groups takes the writing mode (with upright text-orientation) into account, even though these properties do not apply to that element.
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ch-units-vrl-005 |
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sideways vertical writing mode and ch unit on table rows
- The font-metric dependent ch unit on table rows takes the writing mode (with a sideways text-orientation) into account, even though theese properties do not apply to that element.
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ch-units-vrl-006 |
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sideways vertical writing mode and ch unit on table row groups
- The font-metric dependent ch unit on table row groups takes the writing mode (with a sideways text-orientation) into account, even though these properties do not apply to that element.
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ch-units-vrl-007 |
= |
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sideways vertical writing mode and ch unit on table columns
- The font-metric dependent ch unit on table columns takes the writing mode (with a sideways orientation) into account, even though these properties do not apply to that element.
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ch-units-vrl-008 |
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sideways vertical writing mode and ch unit on table column groups
- The font-metric dependent ch unit on table column groups takes the writing mode (with a sideways orientation) into account, even though theses properties do not apply to that element.
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ex-unit-002 |
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support for the ex unit
- The ex unit equals the x-height of the first available font if it has reliable metrics for the x-height.
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ex-unit-003 |
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support for the ex unit
- Even in vertical writing modes, the ex unit equals the x-height of the first available font if it has reliable metrics for the x-height.
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ex-unit-004 |
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support for the ex unit
- The ex unit equals the x-height of the first available font if it has reliable metrics for the x-height.
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line-break-ch-unit |
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Script |
Lines of the ch unit can fit the specified number of characters
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numbers-units-007 |
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Ahem |
Em sizes
- The 'em' unit is equal to the computed value of the 'font-size' property (default) of the element on which it is used.
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numbers-units-009 |
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Ahem |
Em size with the font-size set to px size
- The 'em' unit is equal to the computed value of the 'font-size' property (pixels) of the element on which it is used.
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numbers-units-010 |
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Ahem |
Em size with font-size set to inch
- The 'em' unit is equal to the computed value of the 'font-size' property (inches) of the element on which it is used.
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numbers-units-011 |
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Ahem |
Em size with font-size set to em
- When 'em' is assigned in the value of the 'font-size' property itself, it uses the font size of the parent element.
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numbers-units-012 |
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Ahem |
Em size with font-size set to ex
- The 'em' unit is equal to the computed value of the 'font-size' property (ex) of the element on which it is used.
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numbers-units-013 |
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Ahem |
Em size with font-size set to percentage
- The 'em' unit is equal to the computed value of the 'font-size' property of the element on which it is used.
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numbers-units-015 |
= = |
AhemRecommend |
Height of EX
- In the cases where it is impossible or impractical to determine the x-height, a value of 0.5em should be used.
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numbers-units-019 |
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Ahem |
First available font defines the 'ex' unit size
- The 'ex' unit size is defined by the element's first available font.
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units-001 |
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Ahem |
Units: Equivalence
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units-002 |
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Ahem |
Units: ex
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units-003 |
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Ahem |
Units: ex
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units-004 |
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Ahem |
Units: ex
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units-005 |
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Units: em (0.87em floats)
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units-009 |
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Ahem |
Units: px and dependent font-size
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