Contents
The properties defined in the following sections affect the visual presentation of characters, spaces, words, and paragraphs.
| Property name: | 'text-indent' |
|---|---|
| Value: | <length> | <percentage> | inherit |
| Initial: | 0 |
| Applies to: | block-level elements |
| Inherited: | yes |
| Percentage values: | refer to parent element's width |
| Media groups: | visual |
The property, which only applies to block-level elements that contain inline elements, specifies the indentation of the first line of text in the block. More precisely, it specifies the indentation of the first box that flows into the block's first line box. The box is indented with respect to the left (or right, for right-to-left layout) edge of the line box. User agents should render this indentation as blank space.
Values have the following meanings:
The value of 'text-indent' may be negative, but there may be implementation-specific limits. A line is not indented if the previous line was broken explicitly (e.g., the BR element in HTML).
The following example causes a 3em text indent.
P { text-indent: 3em }
| Property name: | 'text-align' |
|---|---|
| Value: | left | right | center | justify | inherit |
| Initial: | depends on user agent |
| Applies to: | block-level elements |
| Inherited: | yes |
| Percentage values: | N/A |
| Media groups: | visual |
This property describes how a paragraph of text is aligned. More precisely, it specifies how boxes in each line box of a block align width respect to the line box. (Note that alignment is not with respect to the viewport but the current containing block.)
In this example, note that since 'text-align' inherits, all block-level elements inside the DIV element with 'class=center' will be centered.
DIV.center { text-align: center }
Note. The actual justification algorithm used is user-agent and human-language dependent.
Conforming HTML user agents may interpret the value 'justify' as 'left' or 'right', depending on whether the element's default writing direction is left-to-right or right-to-left, respectively.
| Property name: | 'text-decoration' |
|---|---|
| Value: | none | [ underline || overline || line-through || blink ] | inherit |
| Initial: | none |
| Applies to: | all elements |
| Inherited: | no (see prose) |
| Percentage values: | N/A |
| Media groups: | visual |
This property describes decorations that are added to the text of an element. If the property is specified for a block-level element, it affects all inline children. If it is specified for (or affects) an inline element, it affects all boxes generated by the element. If the element has no content or no text content (e.g., the IMG element in HTML), user agents must skip this property.
Values have the following meanings:
The color(s) required for the text decoration should be derived from the 'color' property value.
This property is not inherited, but descendant boxes of a block-level box should be rendered with the same decoration (e.g., they should all be underlined). The color of decorations should remain the same even if descendant elements have different 'color' values.
In the following example for HTML, the text content of all A elements acting as hyperlinks will be underlined:
A:link, A:visited, A:active { text-decoration: underline }
| Property name: | 'text-shadow' |
|---|---|
| Value: | none | [<color> || <length> <length> <length>? ,]* [<color> || <length> <length> <length>?] | inherit |
| Initial: | none |
| Applies to: | all |
| Inherited: | no (see prose) |
| Percentage values: | N/A |
| Media groups: | visual |
The 'text-shadow' property accepts a comma-separated list of shadow effects to be applied to the text of the element. The shadow effects are applied in the order specified and may thus overlay each other, but they will never overlay the text itself. Shadow effects do not alter the size of the element, but may extend beyond its boundaries. The Z-order of the shadow effects is the same as for the element itself.
Each shadow effect must specify a shadow offset and may optionally specify a blur radius and a shadow color.
A shadow offset is specified with two <length> values that indicate the distance from the text. The first length value specifies the horizontal distance to the right of the text. A negative horizontal length value places the shadow to the left of the text. The second length value specifies the vertical distance below the text. A negative vertical length value places the shadow above the text.
A blur radius may optionally be specified after the shadow offset. The blur radius is a length value that indicates the boundaries of the blur effect. The exact algorithm for computing the blur effect is not specified.
A color value may optionally be specified before or after the length values of the shadow effect. The color value will be used as the basis for the shadow effect. If no color is specified, the value of the 'color' property will be used instead.
The example below will set a text shadow to the right and below the element's text. Since no color has been specified, the shadow will have the same color as the element itself, and since no blur radius is specified, the text shadow will not be blurred:
H1 { text-shadow: 0.2em 0.2em }
The next example will place a shadow to the right and below the element's text. The shadow will have a 5px blur radius and will be red.
H2 { text-shadow: 3px 3px 5px red }
The next example specifies a list of shadow effects. The first shadow will be to the right and below the element's text and will be red with no blurring. The second shadow will overlay the first shadow effect, and it will be yellow, blurred, and placed to the left and below the text. The third shadow effect will be placed to the right and above the text. Since no shadow color is specified for the third shadow effect, the value of the element's 'color' property will be used:
H2 { text-shadow: 3px 3px red, yellow -3px 3px 2px, 3px -3px }
Consider this example:
SPAN.glow {
background: white;
color: white;
text-shadow: black 0px 0px 5px;
}
Here, the 'background' and 'color' properties have the same value and the 'text-shadow' property is used to create a "solar eclipse" effect:
Note. This property is not defined in CSS1. Some shadow effects may render text invisible in UAs that only support CSS1.
| Property name: | 'letter-spacing' |
|---|---|
| Value: | normal | <length> | auto | inherit |
| Initial: | normal |
| Applies to: | all elements |
| Inherited: | yes |
| Percentage values: | N/A |
| Media groups: | visual |
This property specifies spacing behavior between text characters. Values have the following meanings:
Character spacing algorithms are user agent-dependent. Character spacing may also be influenced by justification (see the 'text-align' property).
In this example, the space between characters in BLOCKQUOTE elements is increased by '0.1em'.
BLOCKQUOTE { letter-spacing: 0.1em }
This will not happen if 'letter-spacing' is explicitly set to a <length> value, as in:
BLOCKQUOTE { letter-spacing: 0 }
BLOCKQUOTE { letter-spacing: 0cm }
When the resultant space between two characters is not the same as the default space, user agents should not use ligatures
Conforming HTML user agents may consider the value of the 'letter-spacing' property to be 'normal'.
| Property name: | 'word-spacing' |
|---|---|
| Value: | normal | <length> | inherit |
| Initial: | normal |
| Applies to: | all elements |
| Inherited: | yes |
| Percentage values: | N/A |
| Media groups: | visual |
This property specifies spacing behavior between words. Values have the following meanings:
Word spacing algorithms are user agent-dependent. Word spacing may also be influenced by justification (see the 'text-align' property).
In this example, the word-spacing between each word in H1 elements is increased by '1em'.
H1 { word-spacing: 1em }
Conforming HTML user agents may consider the value of the 'word-spacing' property to be 'normal'.
| Property name: | 'text-transform' |
|---|---|
| Value: | capitalize | uppercase | lowercase | none | inherit |
| Initial: | none |
| Applies to: | all elements |
| Inherited: | yes |
| Percentage values: | N/A |
| Media groups: | visual |
This property controls capitalization effects of an element's text. Values have the following meanings:
The actual transformation in each case is human language- dependent. See [RFC2070] for ways to find the language of an element.
Conforming HTML user agents may consider the value of 'text-transform' to be 'none' for characters that are not from the Latin-1 repertoire and for elements in languages for which the transformation is different from that specified by the case-conversion tables of [UNICODE].
In this example, all text in an H1 element is transformed to uppercase text.
H1 { text-transform: uppercase }
Please consult the sections on first line and first letter for information on specially formatting the first letter or line of a paragraph.
| Property name: | 'white-space' |
|---|---|
| Value: | normal | pre | nowrap | inherit |
| Initial: | normal |
| Applies to: | block-level elements |
| Inherited: | yes |
| Percentage values: | N/A |
| Media groups: | visual |
This property declares how whitespace inside the element is handled. Values have the following meanings:
The following examples show what whitespace behavior is expected from the PRE and P elements in HTML.
PRE { white-space: pre }
P { white-space: normal }
Conforming HTML user agents may skip the 'white-space' property in author and user style sheets but must specify a value for it in the default style sheet.
The current CSS2 properties and values cannot describe the behavior of the BR element; the BR element specifies a line break between words. In effect, the element is replaced by a line break. Future versions of CSS may handle added and replaced content, but CSS2-based formatters must treat BR specially.