postcss-calc/src/lib/simplify/log.js

PostCSS plugin to reduce calc()

import { num, call } from '../node.js';

/** @typedef {import('../node.js').Node} Node */

/**
 * @param {Node[]} args
 * @return {Node}
 */
function simplifyLog(args) {
  if (args.length === 1 && args[0].type === 'Num') {
    return num(Math.log(args[0].value));
  }
  if (args.length === 2 && args[0].type === 'Num' && args[1].type === 'Num') {
    return num(Math.log(args[0].value) / Math.log(args[1].value));
  }
  return call('log', args);
}

export { simplifyLog };