The ReferenceError
object represents an error when a variable that doesn't exist (or hasn't yet been initialized) in the current scope is referenced.
ReferenceError
Constructor
-
ReferenceError()
-
Creates a new
ReferenceError
object.
Instance properties
-
ReferenceError.prototype.message
-
Error message.
-
ReferenceError.prototype.name
-
Error name. Inherited from
Error
. -
ReferenceError.prototype.fileName
-
Path to file that raised this error. Inherited from
Error
. -
ReferenceError.prototype.lineNumber
-
Line number in file that raised this error. Inherited from
Error
. -
ReferenceError.prototype.columnNumber
-
Column number in line that raised this error. Inherited from
Error
. -
ReferenceError.prototype.stack
-
Stack trace. Inherited from
Error
.
Examples
Catching a ReferenceError
try { let a = undefinedVariable } catch (e) { console.log(e instanceof ReferenceError) // true console.log(e.message) // "undefinedVariable is not defined" console.log(e.name) // "ReferenceError" console.log(e.fileName) // "Scratchpad/1" console.log(e.lineNumber) // 2 console.log(e.columnNumber) // 6 console.log(e.stack) // "@Scratchpad/2:2:7\n" }
Creating a ReferenceError
try { throw new ReferenceError('Hello', 'someFile.js', 10) } catch (e) { console.log(e instanceof ReferenceError) // true console.log(e.message) // "Hello" console.log(e.name) // "ReferenceError" 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-referenceerror |
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 | |
ReferenceError |
1
|
12
|
1
|
5.5
|
5
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
ReferenceError |
1
|
12
|
1
|
5.5
|
5
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError