ReferenceError
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.
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
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