strip-bom 
Strip UTF-8 byte order mark (BOM) from a string
From Wikipedia:
The Unicode Standard permits the BOM in UTF-8, but does not require nor recommend its use. Byte order has no meaning in UTF-8.
Install
$ npm install --save strip-bom
Usage
const stripBom = require('strip-bom');
stripBom('\uFEFFunicorn');
//=> 'unicorn'
Related
- strip-bom-cli - CLI for this module
- strip-bom-buf - Buffer version of this module
- strip-bom-stream - Stream version of this module
License
MIT © Sindre Sorhus