JSQ

What is the use Function.prototype.apply method?

The apply invokes a function specifying the this or the "owner" object of that function on that time of invocation.

const details = {
  message: 'Hello World!',
};


function getMessage() {
  return this.message;
}


getMessage.apply(details); // returns 'Hello World!'

This method works like Function.prototype.call the only difference is how we pass arguments. In apply we pass arguments as an array.

const person = {
  name: 'Marko Polo',
};


function greeting(greetingMessage) {
  return `${greetingMessage} ${this.name}`;
}


greeting.apply(person, ['Hello']); // returns "Hello Marko Polo!"
October 16, 2022
882

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