|  | 'use strict'; | 
						
						
							|  | const path = require('path'); | 
						
						
							|  | const resolveFrom = require('resolve-from'); | 
						
						
							|  | const parentModule = require('parent-module'); | 
						
						
							|  | 
 | 
						
						
							|  | module.exports = moduleId => { | 
						
						
							|  | 	if (typeof moduleId !== 'string') { | 
						
						
							|  | 		throw new TypeError('Expected a string'); | 
						
						
							|  | 	} | 
						
						
							|  | 
 | 
						
						
							|  | 	const parentPath = parentModule(__filename); | 
						
						
							|  | 
 | 
						
						
							|  | 	const cwd = parentPath ? path.dirname(parentPath) : __dirname; | 
						
						
							|  | 	const filePath = resolveFrom(cwd, moduleId); | 
						
						
							|  | 
 | 
						
						
							|  | 	const oldModule = require.cache[filePath]; | 
						
						
							|  | 	// Delete itself from module parent | 
						
						
							|  | 	if (oldModule && oldModule.parent) { | 
						
						
							|  | 		let i = oldModule.parent.children.length; | 
						
						
							|  | 
 | 
						
						
							|  | 		while (i--) { | 
						
						
							|  | 			if (oldModule.parent.children[i].id === filePath) { | 
						
						
							|  | 				oldModule.parent.children.splice(i, 1); | 
						
						
							|  | 			} | 
						
						
							|  | 		} | 
						
						
							|  | 	} | 
						
						
							|  | 
 | 
						
						
							|  | 	delete require.cache[filePath]; // Delete module from cache | 
						
						
							|  |  | 
						
						
							|  | 	const parent = require.cache[parentPath]; // If `filePath` and `parentPath` are the same, cache will already be deleted so we won't get a memory leak in next step | 
						
						
							|  |  | 
						
						
							|  | 	// In case cache doesn't have parent, fall back to normal require | 
						
						
							|  | 	return parent === undefined || parent.require === undefined ? require(filePath) : parent.require(filePath); | 
						
						
							|  | };
 |