Check if a JavaScript object is empty

is-object-empty.js

// Check if an object is empty

// Option #1 
const checkOpt1 = (obj) => {
  for(let prop in obj) {
    if (obj.hasOwnProperty(prop))
      return false
  }
  return true
}

// Option #2: perform check inclduing `null` & `undefined` object
const checkOpt2 = (obj) => (obj && Object.keys(obj).length === 0 && obj.constructor === Object)

// Option #3: for older browsers
const checkOpt3 = (obj) => Object.prototype.toString.call(obj) = '[object Object]' && JSON.stringify(obj) === '{}'

// References
// https://www.samanthaming.com/tidbits/94-how-to-check-if-object-is-empty/