Homework #2

Instructions

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1. Feynman Writing Prompts - Write out explanations of the following concepts like you are explaining it to a 12 year old. Doing this will help you quickly discover any holes in your understanding. Ask your questions on Slack.

   • arrow functions
   • state
   • constructor
   • setState - setState with a callback function and setState with an object passed in
   • .bind
   • functional components vs class components
   • onClick

2. Fork and clone this repo. When you need to commit use the following commands.

   • Run: npm install -g create-react-app
   • Create a boilerplate React app called clock. create-react-app clock
   • Navigate into /clock and run the command: npm start
   • Your <App /> component will render a <NavBar /> and a <Clock /> component.
   • Create a file called NavBar.js and a file called Clock.js
   • <NavBar /> and <Clock /> will both be React components. <NavBar /> should display the title of your page in a larger font.
   • <Clock /> will display a clock that updates every second. (You will need to use the Date object.)
   • Date example: const now = new Date(); now.getHours(); now.getDay(); now.getMinutes(); now.getSeconds(); etc.
   • Create a clock that updates every second. JavaScript's setInterval(cb, miliseconds) function allows you to specify code that runs after a set time.
   • Style <Clock /> and try to make it look nice.

Congratulations on finishing Homework #2!

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