Logger

An object that can be passed to logger to control how Sass emits warnings and debug messages.

Example

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);

Hierarchy

  • Logger

Methods

debug? warn?

Methods

Optional debug

  • This method is called when Sass emits a debug message due to a @debug rule.

    If this is undefined, Sass will print debug messages to standard error.

    Parameters

    • message: string

      The debug message.

    • options: {
          span: SourceSpan;
      }
      • span: SourceSpan

        The location in the Sass source code that generated this debug message.

    Returns void

Optional warn

  • This method is called when Sass emits a warning, whether due to a @warn rule or a warning generated by the Sass compiler.

    If this is undefined, Sass will print warnings to standard error.

    Parameters

    • message: string

      The warning message.

    • options: {
          deprecation: boolean;
          span?: SourceSpan;
          stack?: string;
      }
      • deprecation: boolean

        Whether this is a deprecation warning.

      • Optional span?: SourceSpan

        The location in the Sass source code that generated this warning.

      • Optional stack?: string

        The Sass stack trace at the point the warning was issued.

    Returns void