| 'use strict'; | |
| var isUtf8 = require('is-utf8'); | |
| module.exports = function (x) { | |
| // Catches EFBBBF (UTF-8 BOM) because the buffer-to-string | |
| // conversion translates it to FEFF (UTF-16 BOM) | |
| if (typeof x === 'string' && x.charCodeAt(0) === 0xFEFF) { | |
| return x.slice(1); | |
| } | |
| if (Buffer.isBuffer(x) && isUtf8(x) && | |
| x[0] === 0xEF && x[1] === 0xBB && x[2] === 0xBF) { | |
| return x.slice(3); | |
| } | |
| return x; | |
| }; |