- Page lifecycle: DOMContentLoaded, load, beforeunload, unload
- 10 Must-have VS Code Extensions for JavaScript Developers
- https://codepen.io
- https://jsfiddle.net/
- https://stackblitz.com
- https://jsbin.com
- http://javascript-benchmark.info
- http://jsben.ch/
- https://jsbench.github.io/