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* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var mod = require( 'module' );
var contains = require( '@stdlib/assert/contains' );
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var BUILTINS = require( './builtins.json' );
// VARIABLES //
var LIST = mod.builtinModules || BUILTINS;
// MAIN //
/**
* Tests whether a string matches a Node.js built-in module name.
*
* @param {*} x - value to test
* @returns {boolean} boolean indicating whether a string matches a Node.js built-in module name
*
* @example
* var out = isNodeBuiltin( 'cluster' );
* // returns true
*
* @example
* var out = isNodeBuiltin( 'crypto' );
* // returns true
*
* @example
* var out = isNodeBuiltin( 'fs-extra' );
* // returns false
*
* @example
* var out = isNodeBuiltin( '' );
* // returns false
*/
function isNodeBuiltin( x ) {
if ( !isString( x ) ) {
return false;
}
return contains( LIST, x );
}
// EXPORTS //
module.exports = isNodeBuiltin;
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