npm install --save @types/selenium-webdriver
This package contains type definitions for Selenium WebDriverJS (https://github.com/SeleniumHQ/selenium/tree/master/javascript/node/selenium-webdriver).
Files were exported from https://www.github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/selenium-webdriver/v2
Additional Details
These definitions were written by Bill Armstrong https://github.com/BillArmstrong, Yuki Kokubun https://github.com/Kuniwak, Craig Nishina https://github.com/cnishina.