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override

Marks a method as intentionally overriding a base class member.

Since TS 4.3 Spec ↗

Syntax

override methodName(): Type

Examples

class Base {
  greet() { return 'hi'; }
}

class Sub extends Base {
  override greet() { return 'hello'; }
}

class Wrong extends Base {
  // override greeet() {} // Error: no base member 'greeet'
}

Notes

The `override` keyword makes the compiler verify that a base class actually declares the member being overridden, catching renames and typos. Enable `noImplicitOverride` to require the keyword on all overriding members.

See also