The `::first-line` CSS pseudo-element applies styles to the first line of a block-level element. Note that the length of the first line depends on many factors, including the width of the element, the width of the document, and the font size of the text.

``````/* Selects the first line of a <p> */
p::first-line {
color: red;
}``````

CSS3 introduced the `::first-line` notation (with two colons) to distinguish pseudo-classes from pseudo-elements. Browsers also accept `:first-line`, introduced in CSS2.

Allowable properties

Only a small subset of CSS properties can be used with the `::first-line` pseudo-element:

Syntax

``````/* CSS3 syntax */
::first-line

/* CSS2 syntax */
:first-line``````

Examples

HTML

``````<p>Styles will only be applied to the first line of this paragraph.
After that, all text will be styled like normal. See what I mean?</p>

<span>The first line of this text will not receive special styling
because it is not a block-level element.</span>``````

CSS

``````::first-line {
color: blue;
text-transform: uppercase;

/* WARNING: DO NOT USE THESE */
/* Many properties are invalid in ::first-line pseudo-elements */
margin-left: 20px;
text-indent: 20px;
}``````

Specifications

Specification Status Comment
CSS Pseudo-Elements Level 4
The definition of '::first-line' in that specification.
Working Draft Defines more strictly where `::first-letter` can occur.
Generalizes allowed properties to typesetting, text decoration, and inline layout properties and `opacity`.
Defines the inheritance of `::first-letter`.
CSS Text Decoration Module Level 3
The definition of 'text-shadow with ::first-line' in that specification.
Candidate Recommendation Allows the use of `text-shadow` with `::first-letter`.
Selectors Level 3
The definition of '::first-line' in that specification.
Recommendation Introduction of the two-colon syntax.
CSS Level 2 (Revision 1)
The definition of '::first-line' in that specification.
Recommendation No change.
CSS Level 1
The definition of '::first-line' in that specification.
Recommendation Initial definition, using the one-colon syntax.

Browser compatibility

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