matrix.js

const Matrix=(id)=>{

    const STATE={
        human_id:id,
        current:'IDLING',
        loaders:[]
    }

    const drive=()=>{
            STATE.loaders.push('driving');
            STATE.current='DRIVING';
    }

    const work=()=>{
           STATE.loaders.push('working'); 
           STATE.current='WORKING' 
    }

    const getActivity=()=>(STATE);

    return {work, drive, getActivity}

}

const getHumanConstructor=()=>{

  let id=0;  
  let matrix={};  

  return class Human{

      constructor(name){
          this.name=name; 
          Object.defineProperty(this,'id',{
                value:++id,
                writable:false,
                configurable:false,
                enumerable:false,    
            })   
          matrix[this.id]=Matrix(this.id);
          } 
      drive(){
          matrix[this.id].drive();
          console.log(`${this.name} is driving.`)
          }
      work(){
          matrix[this.id].work();
          console.log(`${this.name} is working.`)
          }

      __checkActivity(){return matrix[this.id].getActivity()}

  }

}

const Human=getHumanConstructor();

var Neo=new Human('Neo');
Neo.drive(); //@logs "Neo is driving."
Neo.work(); //@logs "Neo is working."
Neo.__checkActivity(); //@returns {human_id: 1, current: "WORKING", loaders: ["driving", "working"]}

var Trinity=new Human('Trinity');
Trinity.drive(); //@logs "Trinity is driving."
Trinity.__checkActivity(); //@returns {human_id: 2, current: "DRIVING", loaders: ["driving"]}