EventPluginRegistry.js — react Source File

Source Code

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */

import type {DispatchConfig} from './ReactSyntheticEventType';
import type {
  AnyNativeEvent,
  PluginName,
  LegacyPluginModule,
} from './PluginModuleType';
import type {TopLevelType} from './TopLevelEventTypes';

type NamesToPlugins = {
  [key: PluginName]: LegacyPluginModule<AnyNativeEvent>,
};
type EventPluginOrder = null | Array<PluginName>;

/**
 * Injectable ordering of event plugins.
 */
let eventPluginOrder: EventPluginOrder = null;

/**
 * Injectable mapping from names to event plugin modules.
 */
const namesToPlugins: NamesToPlugins = {};

/**
 * Recomputes the plugin list using the injected plugins and plugin ordering.
 *
 * @private
 */
function recomputePluginOrdering(): void {
  if (!eventPluginOrder) {
    // Wait until an `eventPluginOrder` is injected.
    return;
  }
  for (const pluginName in namesToPlugins) {
    const pluginModule = namesToPlugins[pluginName];
    // $FlowFixMe[incompatible-use] found when upgrading Flow
    const pluginIndex = eventPluginOrder.indexOf(pluginName);

    if (pluginIndex <= -1) {
      throw new Error(
        'EventPluginRegistry: Cannot inject event plugins that do not exist in ' +
          `the plugin ordering, \`${pluginName}\`.`,
      );
    }

    if (plugins[pluginIndex]) {
      continue;
    }

    if (!pluginModule.extractEvents) {
      throw new Error(
// ... (206 more lines)