//INSTALL WEBP_CONTVERTER WITH NPM: npm install webp-converter
//RUN WITH NODE.JS: node webp.js

var webp = require('webp-converter');
var fs = require('fs');

fs.readdir('img', function(err, files) {
    files.forEach(file => {
        let fullname = file,
            shortname = file.substring(0, file.length - 4);
        webp.cwebp("img/" + fullname, "webp/" + shortname + ".webp", "-q 100", function(status, error) {
            console.log(status);
        });
    })
});