node-steamcommunity/components/helpers.js

exports.isSteamID = function(input) {
	var keys = Object.keys(input);
	if (keys.length != 4) {
		return false;
	}

	// Make sure it has the keys we expect
	keys = keys.filter(function(item) {
		return ['universe', 'type', 'instance', 'accountid'].indexOf(item) != -1;
	});

	return keys.length == 4;
};