The ::grammar-error CSS pseudo-element represents a text segment which the user agent has flagged as grammatically incorrect.

The ::grammar-error pseudo-element follows a special inheritance model common to all highlight pseudo-elements. For more details on how this inheritance works, see the Highlight pseudo-elements inheritance section.

Allowable properties

Only a small subset of CSS properties can be used in a rule with ::grammar-error in its selector:

• color
• background-color
• cursor
• caret-color
• outline and its longhands
• text-decoration and its associated properties
• text-emphasis-color
• text-shadow

Syntax

::grammar-error {
  /* ... */
}

Examples

Basic document grammar check

In this example, eventual supporting browsers should highlight any flagged grammatical errors with the styles shown.

HTML

<p contenteditable spellcheck="true">
  My friends is coming to the party tonight.
</p>

CSS

::grammar-error {
  text-decoration: underline red;
  color: red;
}

Result

Specifications

Browser compatibility

See also

• ::spelling-error
• text-decoration-line