Sentry-javascript: support Stack locals
Do you want to request a feature or report a bug?
feature
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What is the expected behavior?
According to the sentry docs,
In Python and PHP, Sentry will display the values of local variables at the time of each error.
Why don't we have this in js as well, and preferably also in react native? I think with the arguments variable we could log at least the locals of the function generating the exception, which would still be immensely useful.
grigored
All 3 comments
Why don't we have this in js as well, and preferably also in react native? I think with the arguments variable we could log at least the locals of the function generating the exception, which would still be immensely useful.
Unfortunately this isn't possible today in browser JavaScript. The arguments object is lost by the time execution enters try/catch or the onerror global error handler.
We've long experimented with making this possible, but short of re-writing your code during a compilation step to expose every conceivable variable to Raven.js (e.g. using a babel plugin) – which would make all but trivial applications pretty much unusable – there's not much we can do.
benvinegar
on 21 Jul 2017
Unfortunately this isn't possible today in browser JavaScript. The
argumentsobject is lost by the time execution enterstry/catchor theonerrorglobal error handler.
And what about Nodejs ? Would it be possible ?
n-peugnet
on 27 Jun 2019
And what about Nodejs ? Would it be possible ?
You're welcome to give it a shot – pull requests are accepted!
I've heard that it may be possible to run V8 in some kind of debugging/development mode that could expose local variables, if you wanted to start there.
benvinegar
on 27 Jun 2019
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Most helpful comment
Unfortunately this isn't possible today in browser JavaScript. The
argumentsobject is lost by the time execution enterstry/catchor theonerrorglobal error handler.We've long experimented with making this possible, but short of re-writing your code during a compilation step to expose every conceivable variable to Raven.js (e.g. using a babel plugin) – which would make all but trivial applications pretty much unusable – there's not much we can do.