JavaScript has introduced const and let in ECMAScript 2015, which is relatively recent. This is enabled by default in Node.js since Node.js 4.x.
$ git clone git://github.com/creationix/nvm.git ~/.nvm
$ source ~/.nvm/nvm.sh
$ nvm help
$ nvm ls-remote
[root@localhost vagrant]# nvm install v8.16.0
Downloading and installing node v8.16.0…
Downloading https://nodejs.org/dist/v8.16.0/node-v8.16.0-linux-x64.tar.xz…
######################################################################## 100.0%
Computing checksum with sha256sum
Checksums matched!
Now using node v8.16.0 (npm v6.4.1)
[root@localhost vagrant]# node -v
v8.16.0
[root@localhost test]# node chromeTest.js
/home/vagrant/local/app/test/chromeTest.js:3
var By = webdriver.By;
^
ReferenceError: webdriver is not defined
at Object.
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Function.Module.runMain (module.js:694:10)
at startup (bootstrap_node.js:204:16)
at bootstrap_node.js:625:3
What…
