postcss-minify-font-values/src/lib/minify-weight.js

Minify font declarations with PostCSS

'use strict';
/**
 * @param {string} value
 * @return {string}
 */
module.exports = function (value) {
  const lowerCasedValue = value.toLowerCase();

  return lowerCasedValue === 'normal'
    ? '400'
    : lowerCasedValue === 'bold'
      ? '700'
      : value;
};