66 lines
1.5 KiB
JavaScript
66 lines
1.5 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 isFunction = require( '@stdlib/assert/is-function' );
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// MAIN //
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/**
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* Browser shim.
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*
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* @private
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* @param {(string|null)} [encoding] - string encoding
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* @param {Callback} clbk - callback to be invoked upon completion
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* @throws {TypeError} callback argument must be a function
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*
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* @example
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* function onRead( error ) {
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* if ( error ) {
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* return console.error( error.message );
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* }
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* }
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*
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* stdin( onRead );
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*/
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function stdin() {
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var clbk = arguments[ arguments.length-1 ];
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if ( !isFunction( clbk ) ) {
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throw new TypeError( 'invalid argument. Callback argument must be a function. Value: `' + clbk + '`.' );
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}
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setTimeout( onTimeout, 0 );
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/**
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* Callback invoked upon a timeout.
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*
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* @private
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*/
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function onTimeout() {
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clbk( new Error( 'invalid operation. The environment does not support reading from `stdin`.' ) );
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}
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}
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// EXPORTS //
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module.exports = stdin;
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