JSFiddle - React, Tailwind, and code Playground

by WoJWoJ

JavaScript

const myobj = {
  'john': {
    'today': 1,
    'tomorrow': 2
  },
  'mary': {},
}

if ('today' in myobj.john) {
  console.log('john is ok')
}

if ('today' in myobj.mary) {
  console.log('mary is ok')
} else {
  console.log('mary is not ok')
}