Source Map Standard

Mark S. Miller erights at
Wed Apr 11 16:30:13 PDT 2012

Hi Joey,

I'm very glad to see this and I think it should be standardized by TC39.
However, it should not be standardized as "part of the language", and so
would result in a document distinct from Ecma 262. A good model is the way
the internationalization track is proceeding.

Rather than create an entire new track just for source maps, I think this
goes hand in hand with the need to standardize a debugging API. I suggest
both be bundled into one new track.

On Wed, Apr 11, 2012 at 11:11 AM, Joey Schorr <jschorr at> wrote:

> Greetings ES Discuss!
> We (Joey Schorr and John Lenz, CCed) are some of the authors of the source
> map specification that is now implemented by WebKit and Firefox, as well as
> a number of compilers (Closure Compiler, GWT and soon CoffeeScript). Given
> that the specification is becoming a de-facto standard for mapping of code
> which is compiled to JS, we were curious if there was any interest in
> making it an actual standard under TC39. The current specification can be
> found here:
> with a number of contributions from all the various parties involved.
> Thanks!
> Joey Schorr
> Additional information:
> Firefox implementation:
> WebKit implementation:
> Tutorial for Chrome:
> _______________________________________________
> es-discuss mailing list
> es-discuss at

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