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TypeError

The TypeError object represents an error when an operation could not be performed, typically (but not exclusively) when a value is not of the expected type.

A TypeError may be thrown when:

an operand or argument passed to a function is incompatible with the type expected by that operator or function; or
when attempting to modify a value that cannot be changed; or
when attempting to use a value in an inappropriate way.

TypeError is a serializable object, so it can be cloned with structuredClone() or copied between Workers using postMessage().

TypeError is a subclass of Error.

Constructor

TypeError(): Creates a new TypeError object.

Instance properties

Also inherits instance properties from its parent Error.

These properties are defined on TypeError.prototype and shared by all TypeError instances.

TypeError.prototype.constructor: The constructor function that created the instance object. For TypeError instances, the initial value is the TypeError constructor.
TypeError.prototype.name: Represents the name for the type of error. For TypeError.prototype.name, the initial value is "TypeError".

Instance methods

Inherits instance methods from its parent Error.

Examples

Catching a TypeError

try {
  null.f();
} catch (e) {
  console.log(e instanceof TypeError); // true
  console.log(e.message); // "null has no properties"
  console.log(e.name); // "TypeError"
  console.log(e.stack); // Stack of the error
}

Creating a TypeError

try {
  throw new TypeError("Hello");
} catch (e) {
  console.log(e instanceof TypeError); // true
  console.log(e.message); // "Hello"
  console.log(e.name); // "TypeError"
  console.log(e.stack); // Stack of the error
}

Specifications

Specification
ECMAScript Language Specification # sec-native-error-types-used-in-this-standard-typeerror

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`TypeError`	1	12	1	5	1	18	4	10.1	1	1.0	4.4	1.0	0.10.0
`TypeError`	1	12	1	5	1	18	4	10.1	1	1.0	4.4	1.0	0.10.0
`serializable_object`	77	79	103 ["Version 103 serializable properties: `name`, `message`, `cause`, `fileName`, `lineNumber` and `columnNumber`.", "Version 104 also serializes `stack` in the main thread (`window.postMessage()` and `structuredClone()`).", "Version 110 also serializes `stack` in workers (`worker.postMessage()` and `structuredClone()`)."]	64	No	77	103 ["Version 103 serializable properties: `name`, `message`, `cause`, `fileName`, `lineNumber` and `columnNumber`.", "Version 104 also serializes `stack` in the main thread (`window.postMessage()` and `structuredClone()`).", "Version 110 also serializes `stack` in workers (`worker.postMessage()` and `structuredClone()`)."]	55	No	12.0	77	No	No