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);
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