Creating your own errors

Mark S. Miller erights at
Tue Aug 6 12:16:17 PDT 2013

Is a DomainError the dual of a RangeError?

On Tue, Aug 6, 2013 at 11:51 AM, Brendan Eich <brendan at> wrote:

> Problem is, "TypeError" for what Python calls "ValueError", what JS might
> call "DomainError" to go with "RangeError", is lame. Allen, Rick, I forget:
> have we discussed DomainError or ValueError?
> /be
> Anne van Kesteren wrote:
>> On Wed, Jul 17, 2013 at 7:10 PM, Jonas Sicking<jonas at>  wrote:
>>> Good point. It's entirely plausible that we could simply use the ES
>>> SyntaxError in all cases where DOMException SyntaxError is being
>>> thrown today. Would need to be tested though.
>> SyntaxError is used by JavaScript for syntax errors in JavaScript. We
>> shouldn't use it for where we throw "SyntaxError" in platform APIs
>> today per discussion with Allen. (He considered the usage for JSON
>> already as a mistake.)

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