A Happy Programmer

 https://atomizedobjects.com

 https://blog.bitsrc.io/10-ways-to-optimize-your-react-apps-performance-e5e437c9abce https://blog.bitsrc.io/improve-performance-in-react-functional-components-using-react-memo-b2e80c11e15a https://www.codementor.io/blog/react-optimization-5wiwjnf9hj https://www.smashingmagazine.com/2020/07/methods-performance-react-apps/

 https://cssanimation.rocks/transition-vs-animation/

 https://www.smashingmagazine.com/2020/07/react-apps-testing-library/ https://www.robinwieruch.de/react-testing-library --------- https://www.robertcooper.me/testing-redux-apps https://www.robertcooper.me/testing-stateful-react-function-components-with-react-testing-library -------- https://kentcdodds.com/blog/fix-the-not-wrapped-in-act-warning https://kentcdodds.com/blog/stop-mocking-fetch

 https://codepen.io/fabriceleven/pen/bwkGXB

 https://www.joshmorony.com/using-create-animation-wrappper-component-ionic-react-application/ https://www.the-art-of-web.com/css/3d-transforms/ animation

 https://blog.logrocket.com/complete-guide-to-build-product-tours-on-your-react-apps/