import type { CompileResult, StringOptions } from 'sass-embedded';
/**
 * When `NG_BUILD_SASS_EMBEDDED` is set to `0` or `false`, or when running within a
 * WebContainer environment, the native embedded Sass compiler is disabled
 * and the pure-JavaScript Sass compiler is used instead.
 */
export declare const useSassEmbedded: boolean;
/**
 * A Sass renderer implementation that uses the persistent Dart Sass embedded compiler
 * daemon (`sass-embedded`) communicating over standard input/output with protocol buffers,
 * or falls back to the pure-JS Dart Sass async compiler (`sass.initAsyncCompiler()`).
 */
export declare class SassCompiler {
    #private;
    private readonly rebase;
    constructor(rebase?: boolean);
    /**
     * Provides information about the Sass implementation.
     * This mimics enough of the `sass-embedded` or `sass` value to be used with the `sass-loader`.
     */
    get info(): string;
    /**
     * The synchronous render function is not used by the `sass-loader`.
     */
    compileString(): never;
    /**
     * Asynchronously request a Sass stylesheet to be rendered using the native embedded compiler
     * or the pure-JS async compiler fallback.
     *
     * @param source The contents to compile.
     * @param options The `sass` / `sass-embedded` options to use when rendering the stylesheet.
     */
    compileStringAsync(source: string, options: StringOptions<'async'>): Promise<CompileResult>;
    /**
     * Clear the directory cache.
     */
    clearCache(): void;
    /**
     * Shutdown the Sass compiler.
     * @returns A void promise that resolves when closing is complete.
     */
    close(): Promise<void>;
}