source: imaps-frontend/node_modules/escape-string-regexp/index.js@ 0c6b92a

'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');
};