Message

TypeError: Object prototype may only be an Object or null: undefined (V8-based)
TypeError: Object.create requires at least 1 argument, but only 0 were passed (Firefox)
TypeError: Object.setPrototypeOf requires at least 2 arguments, but only 0 were passed (Firefox)
TypeError: Object.defineProperties requires at least 1 argument, but only 0 were passed (Firefox)
TypeError: Object prototype may only be an Object or null. (Safari)

Error type

TypeError.

What went wrong?

There is an error with how a function is called. More arguments need to be provided.

Examples

Required arguments not provided

The Object.create() method requires at least one argument and the Object.setPrototypeOf() method requires at least two arguments:

const obj = Object.create();
// TypeError: Object.create requires at least 1 argument, but only 0 were passed

const obj2 = Object.setPrototypeOf({});
// TypeError: Object.setPrototypeOf requires at least 2 arguments, but only 1 were passed

You can fix this by setting null as the prototype, for example:

const obj = Object.create(null);

const obj2 = Object.setPrototypeOf({}, null);

See also

• Functions guide