Question

How to check if an object contains a function in JavaScript

Answer 1

const obj = {
  add: (a, b) => {
    return a + b;
  },
};

console.log(typeof obj.add);

console.log(typeof obj.add === 'function' ? "contains a function" : "not contains a function");




/*
run:
 
"function"
"contains a function"
  
*/
  
  

 

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