jarle/Bun Check if two objects are deeply equal

Check if two objects are deeply equal

Check if two objects are deeply equal. This is used internally by expect().toEqual() in Bun's test runner.

const a = { a: 1, b: 2, c: { d: 3 } };
const b = { a: 1, b: 2, c: { d: 3 } };

Bun.deepEquals(a, b); // true

Pass true as a third argument to enable strict mode. This is used internally by expect().toStrictEqual() in Bun's test runner.

The following examples would return true in non-strict mode but false in strict mode.

// undefined values
Bun.deepEquals({}, { a: undefined }, true); // false

// undefined in arrays
Bun.deepEquals(["asdf"], ["asdf", undefined], true); // false

// sparse arrays
Bun.deepEquals([, 1], [undefined, 1], true); // false

// object literals vs instances w/ same properties
class Foo {
  a = 1;
}
Bun.deepEquals(new Foo(), { a: 1 }, true); // false

See Docs > API > Utils for more useful utilities.