Question

How to check if an object has a given property in JavaScript

Answer 1

class Worker {
    constructor(id, name, age) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.show = function () {
            console.log(this.id + ' ' + this.name + ' ' + this.age);
        }
    }

}
  
const worker = new Worker(2345, 'Tom', 54);

if ('age' in worker)
    console.log('yes');
  
  

    
/*
run:
  
yes
  
*/
 

 

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