Name
TypeError: thrown when a value is of the wrong type â ECMAScript v3: Object â Error â TypeError
Constructor
new TypeError( )
new TypeError(message
)
Arguments
-
message
An optional error message that provides details about the exception. If specified, this argument is used as the value for the
message
property of the TypeError object.
Returns
A newly constructed TypeError object. If the
message
argument is specified, the
Error object uses it as the value of its message
property; otherwise, it uses an
implementation-defined default string as the value of that
property. When the TypeError( )
constructor is called as a function, without the new
operator, it behaves just as it does
when called with the new
operator.
Properties
-
message
An error message that provides details about the exception. This property holds the string passed to the constructor, or an implementation-defined default string. See
Error.message
for details.-
name
A string that specifies the type of the exception. All TypeError objects inherit the value âTypeErrorâ for this property.
Description
An instance of the TypeError class is thrown when a value is
not of the type expected. This happens most often when you attempt
to access a property of a null
or
undefined
value. It can also
occur if you invoke a method defined by one class on an object that
is an instance of some other class, or if you use the new
operator with a value that is not a constructor function, for example. JavaScript implementations are also permitted ...
Get JavaScript: The Definitive Guide, 5th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.