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packages/react-dom-bindings/src/events/isEventSupported.js
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Andrew Clark
[Codemod] Update copyright header to Meta (#25315)
18 окт 2022, 18:19
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18 окт 2022, 18:19
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/** * 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 {canUseDOM} from 'shared/ExecutionEnvironment'; /** * Checks if an event is supported in the current execution environment. * * NOTE: This will not work correctly for non-generic events such as `change`, * `reset`, `load`, `error`, and `select`. * * Borrows from Modernizr. * * @param {string} eventNameSuffix Event name, e.g. "click". * @return {boolean} True if the event is supported. * @internal * @license Modernizr 3.0.0pre (Custom Build) | MIT */ function isEventSupported(eventNameSuffix: string): boolean { if (!canUseDOM) { return false; } const eventName = 'on' + eventNameSuffix; let isSupported = eventName in document; if (!isSupported) { const element = document.createElement('div'); element.setAttribute(eventName, 'return;'); isSupported = typeof (element: any)[eventName] === 'function'; } return isSupported; } export default isEventSupported;