51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
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/**
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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 isString = require( '@stdlib/assert/is-string' ).isPrimitive;
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var RE_DIRNAME = require( '@stdlib/regexp/dirname' ).REGEXP;
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// MAIN //
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/**
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* Returns a path dirname.
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*
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* @param {string} path - path
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* @throws {TypeError} must provide a string primitive
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* @returns {string} directory name
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*
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* @example
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* var dir = dirname( './foo/bar/index.js' );
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* // returns './foo/bar'
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*/
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function dirname( path ) {
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if ( !isString( path ) ) {
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throw new TypeError( 'invalid argument. Path must be a primitive string. Value: `' + path + '`.' );
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}
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return RE_DIRNAME.exec( path )[ 1 ];
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}
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// EXPORTS //
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module.exports = dirname;
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