This project was bootstrapped with Create React App.

npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

Example 1

const EVENTS1 = [
  {start: 30, end: 120}, 
  {start: 300, end: 330}, 
  {start: 290, end: 330}
]

renderDay(EVENTS1)

Result

Example 2

const EVENTS1 = [
  { start: 30, end: 120 },
  { start: 110, end: 130 },
  { start: 120, end: 200 },
  { start: 290, end: 330 },
]

renderDay(EVENTS1)

Result