Bootstrap/js/dist/dom/data.js

/*!
  * Bootstrap data.js v5.3.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2022 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Data = factory());
})(this, (function () { 'use strict';

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v5.3.0-alpha1): dom/data.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
   * --------------------------------------------------------------------------
   */

  /**
   * Constants
   */

  const elementMap = new Map();
  const data = {
    set(element, key, instance) {
      if (!elementMap.has(element)) {
        elementMap.set(element, new Map());
      }
      const instanceMap = elementMap.get(element);

      // make it clear we only want one instance per element
      // can be removed later when multiple key/instances are fine to be used
      if (!instanceMap.has(key) && instanceMap.size !== 0) {
        // eslint-disable-next-line no-console
        console.error(`Bootstrap doesn't allow more than one instance per element. Bound instance: ${Array.from(instanceMap.keys())[0]}.`);
        return;
      }
      instanceMap.set(key, instance);
    },
    get(element, key) {
      if (elementMap.has(element)) {
        return elementMap.get(element).get(key) || null;
      }
      return null;
    },
    remove(element, key) {
      if (!elementMap.has(element)) {
        return;
      }
      const instanceMap = elementMap.get(element);
      instanceMap.delete(key);

      // free up element references if there are no instances left for an element
      if (instanceMap.size === 0) {
        elementMap.delete(element);
      }
    }
  };

  return data;

}));
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