A Happy Programmer

https://www.codementor.io/vijayst/unit-testing-react-components-jest-or-enzyme-du1087lh8

Lucky https://www.amazon.com/dp/B06XBWZ56J/ref=sspa_dk_detail_3?psc=1&pd_rd_i=B06XBWZ56J&pd_rd_w=YNKfk&pf_rd_p=f0dedbe2-13c8-4136-a746-4398ed93cf0f&pd_rd_wg=Z3nNF&pf_rd_r=MDGQA0PBE3PSSMPZZVJ1&pd_rd_r=bdc6c2d2-1062-11e9-b87d-79a2901a39bf#customerReviews Deeper https://www.amazon.com/dp/B07BR2FQZN/ref=psdc_551460_t1_B01N52WKKO iBobber: Vexilar SonarPhone with Transducer Pod https://www.amazon.com/Vexilar-SP100-SonarPhone-Transducer-Pod/dp/B00CJJBM66/ref=cm_cr_arp_d_product_top?ie=UTF8

http://furqanzafar.github.io/react-selectize/#/?category=multi&example=multi-select https://stackoverflow.com/questions/50922587/what-is-the-difference-between-valuecomponent-and-valuerenderer-in-react-select

https://appendto.com/2017/06/asyncawait-come-use/ https://hackernoon.com/understanding-async-await-in-javascript-1d81bb079b2c

http://reactdesktop.js.org/demo/

Sakai https://www.claroline.net moodle https://www.edx.org

How to Improve Your JavaScript Skills by Writing Your Own Web Development Framework https://medium.freecodecamp.org/how-to-improve-your-javascript-skills-by-writing-your-own-web-development-framework-eed2226f190