| CssParserAtRule | An at-rule (https://wicg.github.io/css-parser-api/#cssparseratrule, https://drafts.csswg.org/css-syntax-3/#at-rule): its name, its prelude and its block, or no block for a statement (e.g. @import url(a.css);). |
| CssParserBlock | A simple block (https://wicg.github.io/css-parser-api/#cssparserblock, https://drafts.csswg.org/css-syntax-3/#simple-block): [...], (...) or {...}. |
| CssParserDeclaration | A declaration (https://wicg.github.io/css-parser-api/#cssparserdeclaration, https://drafts.csswg.org/css-syntax-3/#declaration): a name and a value, e.g. color: red. |
| CssParserFunction | A function (https://wicg.github.io/css-parser-api/#cssparserfunction, https://drafts.csswg.org/css-syntax-3/#function): its name and its arguments, the component values between the commas at the top level of the function. |
| CssParserOptions | The options of the CSS Parser API (https://wicg.github.io/css-parser-api/#dictdef-cssparseroptions). |
| CssParserQualifiedRule | A qualified rule (https://wicg.github.io/css-parser-api/#cssparserqualifiedrule, https://drafts.csswg.org/css-syntax-3/#qualified-rule), e.g. a style rule: its prelude and the rules and declarations of its block. |
| CssParserRule | A rule or a declaration returned by the CSS Parser API (https://wicg.github.io/css-parser-api/#cssparserrule). |
| CssParserValue | A function or a simple block returned by the CSS Parser API (https://wicg.github.io/css-parser-api/#cssparservalue). |