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Type Casting

Implicit​

The JIT runtime compiler of JavaScript automatically can convert types based on usages.

const foo = "foo";
const num = 1;

console.log(foo + num); // outputs "foo1" after casting the number to a string

Explicit​

Sometimes as a developer you want to force the type to be cast to another type. This is done using the built in methods;

  • parseInt() // converts anything to an integer
  • parseFloat() // converts anything to a float
  • toString() // converts anything to a string

Type coercion​

This just means that implicit casting occurs in the runtime compiler.