JavaScript ErrorsError

TypeError: x is not a constructor

errorCodes.js-typeerror-not-a-constructor.name

errorCodes.js-typeerror-not-a-constructor.description

browsernode

type-system runtime

What causes this error

errorCodes.js-typeerror-not-a-constructor.cause

How to fix it

errorCodes.js-typeerror-not-a-constructor.fix

Example

const fn = () => {}; new fn(); // TypeError: fn is not a constructor

Official Documentation

Related Error Codes

JavaScript ErrorsError

TypeError: Cannot read properties of undefined/null

errorCodes.js-typeerror-cannot-read-properties.name

errorCodes.js-typeerror-cannot-read-properties.description

JavaScript ErrorsError

DOMException: DataCloneError

errorCodes.js-domexception-data-clone.name

errorCodes.js-domexception-data-clone.description

JavaScript ErrorsError

TypeError: x is not iterable

errorCodes.js-typeerror-not-iterable.name

errorCodes.js-typeerror-not-iterable.description

JavaScript ErrorsError

TypeError: Cannot convert a Symbol value to a string

errorCodes.js-typeerror-symbol-to-string.name

errorCodes.js-typeerror-symbol-to-string.description

JavaScript ErrorsError

SyntaxError: Unexpected token

errorCodes.js-syntaxerror-unexpected-token.name

errorCodes.js-syntaxerror-unexpected-token.description

JavaScript ErrorsError

errorCodes.js-econnrefused.name

errorCodes.js-econnrefused.description