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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().

Constructor

TypeError(): Creates a new TypeError object.

Instance properties

TypeError.prototype.message: Error message. Inherited from Error.
TypeError.prototype.name: Error name. Inherited from Error.
TypeError.prototype.cause: Error cause. Inherited from Error.
TypeError.prototype.fileName Non-standard: Path to file that raised this error. Inherited from Error.
TypeError.prototype.lineNumber Non-standard: Line number in file that raised this error. Inherited from Error.
TypeError.prototype.columnNumber Non-standard: Column number in line that raised this error. Inherited from Error.
TypeError.prototype.stack Non-standard: Stack trace. Inherited from 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.fileName)              // "Scratchpad/1"
  console.log(e.lineNumber)            // 2
  console.log(e.columnNumber)          // 2
  console.log(e.stack)                 // "@Scratchpad/2:2:3\n"
}

Creating a TypeError

try {
  throw new TypeError('Hello', "someFile.js", 10)
} catch (e) {
  console.log(e instanceof TypeError)  // true
  console.log(e.message)               // "Hello"
  console.log(e.name)                  // "TypeError"
  console.log(e.fileName)              // "someFile.js"
  console.log(e.lineNumber)            // 10
  console.log(e.columnNumber)          // 0
  console.log(e.stack)                 // "@Scratchpad/2:2:9\n"
}

Specifications

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

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`TypeError`	1	12	1	5.5	5	1	4.4	18	4	10.1	1	1.0	1.0	0.10.0
`TypeError`	1	12	1	5.5	5	1	4.4	18	4	10.1	1	1.0	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 `window.postMessage()` and `structuredClone()`."]	No	64	No	77	77	103 ["Version 103 serializable properties: `name`, `message`, `cause`, `fileName`, `lineNumber` and `columnNumber`.", "Version 104 also serializes `stack` in `window.postMessage()` and `structuredClone()`."]	55	No	12.0	No	No