lens/src/renderer/utils/cssNames.ts

/**
 * Copyright (c) 2021 OpenLens Authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

// Helper for combining css classes inside components

export type IClassName = string | string[] | IClassNameMap;
export type IClassNameMap = {
  [className: string]: boolean | any;
};

export function cssNames(...args: IClassName[]): string {
  const map: IClassNameMap = {};

  args.forEach(className => {
    if (typeof className === "string" || Array.isArray(className)) {
      [].concat(className).forEach(name => map[name] = true);
    }
    else {
      Object.assign(map, className);
    }
  });

  return Object.entries(map)
    .filter(([, isActive]) => !!isActive)
    .map(([className]) => className.trim())
    .join(" ");
}