object-class.js

class Car {
  
  constructor(type, color) {
    this.type =  type
    this.color = color
    this.engineStatus = 'off'
  }
  
  engineStart () {
    
    this.engineStatus = 'on'
    console.log('engine start')
  }
  
  engingeStop () {
    this.engineStatus = 'off'
    console.log('engine start')
  }
  
  static isEngineOn (car) {
    if (car.engineStatus === 'on') {
      console.log('Engine On')
    } else {
      console.log('Engine off')
    }
  }    
  
}