@instructure/ui-themeable/lib/pickOverrides.js

A UI component library made by Instructure Inc.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.pickOverrides = pickOverrides;
exports.default = void 0;

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - present Instructure, Inc.
 *
 * 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.
 */

/**
 * ---
 * category: utilities/themes
 * ---
 * Return only the theme variables that are different from the default
 * @param {Object} defaultTheme
 * @param {Object} theme
 * @returns {Object} variables that are different from the defaults
 */
function pickOverrides(defaultTheme, theme) {
  var overrides = {}; // shortcut if possible

  if (defaultTheme === theme || !theme) return overrides; // filter out any properties that have values that are the same as in defaults

  Object.keys(theme).forEach(function (key) {
    if (defaultTheme[key] !== theme[key]) {
      overrides[key] = theme[key];
    }
  });
  return overrides;
}

var _default = pickOverrides;
exports.default = _default;