TypeError: More arguments needed
The JavaScript exception "more arguments needed" occurs when there is an error with howa function is called. More arguments need to be provided.
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
What went wrong?
There is an error with how a function is called. More arguments need to be provided.
Examples
Required arguments not provided
TheObject.create()
method requires at least one argument and theObject.setPrototypeOf()
method requires at least two arguments:
js
const obj = Object.create();// TypeError: Object.create requires at least 1 argument, but only 0 were passedconst obj2 = Object.setPrototypeOf({});// TypeError: Object.setPrototypeOf requires at least 2 arguments, but only 1 were passed
You can fix this by settingnull
as the prototype, for example:
js
const obj = Object.create(null);const obj2 = Object.setPrototypeOf({}, null);
See also
- Functions guide