114 lines
2.8 KiB
JavaScript
114 lines
2.8 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 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 proc = require( 'process' );
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var getGlobal = require( '@stdlib/utils/global' );
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var nativeClass = require( '@stdlib/utils/native-class' );
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var isObject = require( './../../is-plain-object' );
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var isString = require( './../../is-string' ).isPrimitive;
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var globalScope = require( './global_scope.js' );
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// VARIABLES //
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var Global = getGlobal();
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var RE = /node|io\.js/;
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// MAIN //
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/**
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* Returns a boolean indicating if the runtime is Node.js.
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*
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* @returns {boolean} boolean indicating if runtime is Node.js
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*
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* @example
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* var bool = isNode();
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* // returns <boolean>
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*/
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function isNode() {
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return (
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// Check for presence of `global` variable:
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typeof global === 'object' &&
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// Check that the `global` variable matches the determined global variable:
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global === Global &&
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// Check for a circular reference to the global variable:
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Global === Global.global &&
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// Check that the global variable has the expected internal class:
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(
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// Node < v7
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nativeClass( Global ) === '[object global]' ||
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// Node >= v7 (https://github.com/nodejs/node/issues/9274)
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nativeClass( Global ) === '[object Object]'
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) &&
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// Check that the `global` variable is equal to the global scope:
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globalScope === true &&
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// Check for a `require` global variable:
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typeof require === 'function' &&
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// Check for a `process` global variable:
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typeof proc === 'object' &&
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// Check that the `process` global variable has the expected internal class:
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(
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// Node < v14.6.0
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nativeClass( proc ) === '[object process]' ||
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// Node >= v14.6.0
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nativeClass( proc ) === '[object Object]'
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) &&
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// Check for a `versions` property:
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isObject( proc.versions ) &&
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// Check for a `node` property:
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isString( proc.versions.node ) &&
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(
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// `process.release` was added in Node v3.0.0 via io.js:
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typeof proc.release === 'undefined' ||
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(
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// Check for a `release` property:
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isObject( proc.release ) &&
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// Check for a `name` property:
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isString( proc.release.name ) &&
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// Check that the release name contains either `node` or `io.js` (in Node.js/io.js, the release name is read-only):
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RE.test( proc.release.name )
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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 = isNode;
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