apply vs call

Written byPhuoc Nguyen

#Difference

Following is the syntax of these methods, where `fn` represents a given function:

fn.apply(context, arrayOfArguments);
fn.call(context, arg1, arg2, ...);

As you see, `apply` requires the arguments as an array, whereas `call` requires the arguments to be listed explicitly.

For example, the following function returns the sum of three numbers.

const sum = (a, b, c) => a + b + c;

sum.apply(null, [1, 2, 3]); // 6
sum.call(null, 1, 2, 3); // 6

#Tip

You can use this mnemonic to remember the differences between `apply` and `call`:

A is for array

C is for comma

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Phước Nguyễn

apply vs call

#Difference

#Tip

Questions? 🙋

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