try_require.js (1398B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var isError = require( '@stdlib/assert/is-error' ); 24 25 26 // MAIN // 27 28 /** 29 * Wraps `require` in a try/catch block. 30 * 31 * @param {string} id - module id 32 * @returns {*|Error} `module.exports` of the resolved module or an error 33 * 34 * @example 35 * var out = tryRequire( 'beepboop' ); 36 * 37 * if ( out instanceof Error ) { 38 * console.error( out.message ); 39 * } 40 */ 41 function tryRequire( id ) { 42 try { 43 return require( id ); // eslint-disable-line stdlib/no-dynamic-require 44 } catch ( error ) { 45 if ( isError( error ) ) { 46 return error; 47 } 48 // Handle case where a literal is thrown... 49 if ( typeof error === 'object' ) { 50 return new Error( JSON.stringify( error ) ); 51 } 52 return new Error( error.toString() ); 53 } 54 } 55 56 57 // EXPORTS // 58 59 module.exports = tryRequire;