recursively find all files in a directory with given extension in node.js

gistfile1.js

import path from 'path';
import { readdirSync, statSync } from 'fs';

function recFindByExt(base,ext,files,result) 
{
    files = files || readdirSync(base) 
    result = result || [] 

    files.forEach( 
        function (file) {
            var newbase = path.join(base,file)
            if ( statSync(newbase).isDirectory() )
            {
                result = recFindByExt(newbase,ext,readdirSync(newbase),result)
            }
            else
            {
                if ( file.substr(-1*(ext.length+1)) == '.' + ext )
                {
                    result.push(newbase)
                } 
            }
        }
    )
    return result
}

ext_file_list = recFindByExt('/mypath','ext')