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Feature Request: option for only-last-statement evaluation #24

getify opened this Issue Jan 8, 2019 · 1 comment


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getify commented Jan 8, 2019

I would like an option to switch on a mode like how browser devtools consoles only evaluate the last statement in a snippet, because sometimes you have a bunch of statements in a snippet of code that you don't want to evaluate, but only want to evaluate the last statement.

Consider the differences between these two:

screen shot 2019-01-08 at 10 38 15 am

screen shot 2019-01-08 at 10 38 44 am

In RunJS, it outputs the result of the x = foo() statement (which is just another function), and then also evaluates both x() calls. In the Chrome console, it only evaluates the last x() call.

Sometimes, I want the behavior of the former, sometimes I want the behavior of the latter. It would be really nice to have an option to toggle between both modes.


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lukehaas commented Jan 8, 2019

Makes sense.
I'll create an option for line-by-line evaluation, defaulting to true.

@lukehaas lukehaas added the enhancement label Jan 8, 2019

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