postcss-merge-longhand/types/lib/unresolved.d.ts

Merge longhand properties into shorthand with PostCSS.

declare const substitutionFunctions: string[];
declare const trustedSupportFunctions: Set<string>;
/**
 * Whether a token represents an unresolved value this plugin cannot compute.
 *
 * Only the leading function determines this: var(--x, rgba(0,0,0,.5)) will
 * substitute a user-agent-computed value, so we cannot infer its type from the
 * fallback. Accepting all bracketed tokens instead would allow any function to
 * represent any type—padding-top: url(x) becomes a length, border-top-width:
 * rgb(0 0 0) a width—and user agents ignore both invalid declarations, so
 * merging them produces invalid shorthands.
 *
 * @param {string} token
 * @return {boolean}
 */
declare function isUnresolved(token: string): boolean;
/**
 * Whether a token is a substitution function specifically — the one class of
 * trusted function whose type stays unknowable after substitution, so it can
 * fill any border component rather than only the ones its own type matches.
 *
 * @param {string} token
 * @return {boolean}
 */
declare function isSubstitution(token: string): boolean;
export { isSubstitution, isUnresolved, substitutionFunctions, trustedSupportFunctions, };
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