polished/lib/helpers/stripUnit.js

A lightweight toolset for writing styles in Javascript.

"use strict";

exports.__esModule = true;
exports["default"] = stripUnit;
var cssRegex = /^([+-]?(?:\d+|\d*\.\d+))([a-z]*|%)$/;

/**
 * Returns a given CSS value minus its unit of measure.
 *
 * @example
 * // Styles as object usage
 * const styles = {
 *   '--dimension': stripUnit('100px')
 * }
 *
 * // styled-components usage
 * const div = styled.div`
 *   --dimension: ${stripUnit('100px')};
 * `
 *
 * // CSS in JS Output
 *
 * element {
 *   '--dimension': 100
 * }
 */
function stripUnit(value) {
  if (typeof value !== 'string') return value;
  var matchedValue = value.match(cssRegex);
  return matchedValue ? parseFloat(value) : value;
}
module.exports = exports.default;