The ReferenceError
object represents an error when a non-existent variable is referenced.
Syntax
new ReferenceError([message[, fileName[, lineNumber]]])
Parameters
message
Optional- Optional. Human-readable description of the error.
fileName
Optional- Optional. The name of the file containing the code that caused the exception.
lineNumber
Optional- Optional. The line number of the code that caused the exception.
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 (ECMA-262) The definition of 'NativeError constructor' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ReferenceError() constructor | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 5.5 | Opera Full support 5 | Safari Full support 1 | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.1.100 |
Legend
- Full support
- Full support