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						 | 
						- 'use strict';
 - 
 - module.exports = string => {
 - 	if (typeof string !== 'string') {
 - 		throw new TypeError('Expected a string');
 - 	}
 - 
 - 	// Escape characters with special meaning either inside or outside character sets.
 - 	// Use a simple backslash escape when it’s always valid, and a \unnnn escape when the simpler form would be disallowed by Unicode patterns’ stricter grammar.
 - 	return string
 - 		.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&')
 - 		.replace(/-/g, '\\x2d');
 - };
 
 
  |