Its based on webdriver-sizzle and fixes issues related to the latest selenium-webdriver updates issues.
Locate a selenium-webdriver element by sizzle CSS3 selector.
var selenium =require('selenium-webdriver');
var sizzle =require('plus.webdriver-sizzle');
var driver =newseleniumWebdriver.Builder().forBrowser('chrome').build();
var $ =sizzle(driver);
// Find the first element with class btn and click it