Adding to an array

The push method appends new items to the end of an array.

TypeScript will produce a compilation error if the new value does not match the array's element type.

Even though the program above is a valid JavaScript program that will successfully add "four" to the array, TypeScript enforces the element type unless you explicitly set the array's type to any[].

You can also use the push method to append any number of new values with a single instruction.