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Viewing / Editing File: index.d.ts

import {SourceSpan} from './source_span';

export {SourceLocation} from './source_location';
export {SourceSpan} from './source_span';

/**
 * An object that can be passed to [[LegacySharedOptions.logger]] to control how
 * Sass emits warnings and debug messages.
 *
 * @example
 *
 * ```js
 * const fs = require('fs');
 * const sass = require('sass');
 *
 * let log = "";
 * sass.renderSync({
 *   file: 'input.scss',
 *   logger: {
 *     warn(message, options) {
 *       if (options.span) {
 *         log += `${span.url}:${span.start.line}:${span.start.column}: ` +
 *             `${message}\n`;
 *       } else {
 *         log += `::: ${message}\n`;
 *       }
 *     }
 *   }
 * });
 *
 * fs.writeFileSync('log.txt', log);
 * ```
 *
 * @category Logger
 */
export interface Logger {
  /**
   * This method is called when Sass emits a warning, whether due to a [`@warn`
   * rule](https://sass-lang.com/documentation/at-rules/warn) or a warning
   * generated by the Sass compiler.
   *
   * If this is `undefined`, Sass will print warnings to standard error.
   *
   * @param message - The warning message.
   * @param options.deprecation - Whether this is a deprecation warning.
   * @param options.span - The location in the Sass source code that generated this
   * warning.
   * @param options.stack - The Sass stack trace at the point the warning was issued.
   */
  warn?(
    message: string,
    options: {
      deprecation: boolean;
      span?: SourceSpan;
      stack?: string;
    }
  ): void;

/**
   * This method is called when Sass emits a debug message due to a [`@debug`
   * rule](https://sass-lang.com/documentation/at-rules/debug).
   *
   * If this is `undefined`, Sass will print debug messages to standard error.
   *
   * @param message - The debug message.
   * @param options.span - The location in the Sass source code that generated this
   * debug message.
   */
  debug?(message: string, options: {span: SourceSpan}): void;
}

/**
 * A namespace for built-in [[Logger]]s.
 *
 * @category Logger
 * @compatibility dart: "1.43.0", node: false
 */
export namespace Logger {
  /**
   * A [[Logger]] that silently ignores all warnings and debug messages.
   *
   * @example
   *
   * ```js
   * const sass = require('sass');
   *
   * const result = sass.renderSync({
   *   file: 'input.scss',
   *   logger: sass.Logger.silent,
   * });
   * ```
   */
  export const silent: Logger;
}

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