Does node.js has 'match()' method? If so what is the syntax?

I tried using .match() method in node.js and the console returns has no method 'match'. This is the part where I call the method:

fs.readFile('proxy.txt', function (err, data) {
    if (data.match('\n').length < proxyNum) {
        proxyNum = data.match('\n').length;
    }
    console.log('Testing ' + proxyNum + 'proxies.');
});

Any idea how I could properly call .match()?