65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2021 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var IS_BROWSER = require( './../../is-browser' );
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var getGlobal = require( '@stdlib/utils/global' );
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// VARIABLES //
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var Global = getGlobal();
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// MAIN //
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/**
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* Returns a boolean indicating if an environment is a touch device.
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*
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* @private
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* @returns {boolean} boolean indicating if an environment is a touch-enabled environment
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*/
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function isTouchDevice() {
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if ( !IS_BROWSER ) {
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return false;
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}
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return !!(
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'ontouchstart' in Global ||
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(
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Global.DocumentTouch &&
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Global.document &&
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Global.document instanceof Global.DocumentTouch
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) ||
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(
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Global.navigator &&
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(
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Global.navigator.maxTouchPoints > 0 ||
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Global.navigator.msMaxTouchPoints > 0
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)
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)
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);
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}
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// EXPORTS //
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module.exports = isTouchDevice;
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