[https://www.30secondsofcode.org/js/s/deep-get](https://www.30secondsofcode.org/js/s/deep-get) [https://www.30secondsofcode.org/js/s/deep-freeze](https://www.30secondsofcode.org/js/s/deep-freeze) [https://www.30secondsofcode.org/js/s/check-prop](https://www.30secondsofcode.org/js/s/check-prop) [https://www.30secondsofcode.org/js/s/bind-all](https://www.30secondsofcode.org/js/s/bind-all) [https://www.30secondsofcode.org/js/s/defaults](https://www.30secondsofcode.org/js/s/defaults) [https://www.30secondsofcode.org/js/s/get](https://www.30secondsofcode.org/js/s/get) [https://www.30secondsofcode.org/js/s/has-key](https://www.30secondsofcode.org/js/s/has-key) [https://www.30secondsofcode.org/js/s/is-deep-frozen](https://www.30secondsofcode.org/js/s/is-deep-frozen)