Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The toSource() method returns code that could eval to the same error.

Syntax

e.toSource()

Return value

A string containing the source code of the error.

Description

Calling the toSource method of an Error instance (includingNativeErrors) will return a string containing the source code of the error. This string can be evaluated to create an (approximately) equal object. Naturally, the string containing the source follows the structure of the Error constructor. For example:

(newname(message ,fileName,lineNumber))

where these attributes correspond to the respective properties of the error instance.

Note: Be aware that the properties used by the toSource method in the creation of this string are mutable and may not accurately reflect the function used to create an error instance or the filename or line number where the actual error occurred.

Specifications

Not part of any standard. Implemented in JavaScript 1.3.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No1 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No No4 No No No

See also

Document Tags and Contributors

Last updated by: schlagi123,