Do you know what will be the output of this code? function sum(a, b) { return this.base + a + b; } console.log(sum.apply({ base: 1 }, [2, 3]));

What is the difference between call and apply in JavaScript?

Do you know what will be the output of this code?

JavaScript

function sum(a, b) {
  return this.base + a + b;
}

console.log(sum.apply({ base: 1 }, [2, 3]));

Show answer and explanation

The answer is 6.

apply calls sum with this set to { base: 1 } and spreads the array into arguments: 1 + 2 + 3. The call equivalent is sum.call({ base: 1 }, 2, 3).

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What is the difference between call and apply in JavaScript?

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