tsc -w should clear screen before each run

Run compiler in watch mode: tsc -w. Change some files, causing multiple compilations.

Expected behavior:

As a developer, I expect the output of tsc -w to be relevant and concise to the current runtime. It should show me the information only of the current run, stating that either the compilation was a success or fail with an error message.

Actual behavior:

The output of previous compilations is kept.

Benefit:

During development, seeing old output is redundant, noisy, and it also takes away if there are errors in the output as I am not alarmed to them right away. They could simply have been errors from the last run.

I have to manually enter new lines or check the timestamps. I have to parse the output what error messages relate to which run. I am discovering myself hitting enter multiple times to create distinguishable marks so that I better see the output of the next run. Sometimes I just cancel watch mode and run tsc multiple times manually while debugging an issue.

Another tool that has a similar feature to what I am proposing is mocha with their min reporter.

Accepting PRs - should be straightforward. Add a cls method to sys; we'll take care of implementing it for tsc.exe

on linux, I m using this for a lone time:

function tscp {
        echo -en "\ec\0typescript compiling (source: $1)...\r"
        tsc -w -p "$1" | sed 's/^.*File change detected/\x1Bc\0/g'
}

cmd.exe also support "\x1Bc" ( c ), at least on win10.

Fixed by #20389

How can I disable this?

This is very disruptive for my setup. Please add an option to disable.

Matt Haggard (@iffy)

Matt Haggard (@iffy) Stefan Eilemann (@eile) This issue was for clearing the screen during watch mode. If you want an option to disable that feature, you'll better open a new issue as this one has been closed.

(And xkcd prives right once again: https://imgs.xkcd.com/comics/workflow_2x.png ;) )

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tsc -w should clear screen before each run #13020

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tsc -w should clear screen before each run #13020

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RyanCavanaugh commented on Mar 7, 2017

GongT commented on Jun 18, 2017

mhegazy commented on Dec 2, 2017

iffy commented on Feb 22, 2018

eile commented on Feb 26, 2018

k0pernikus commented on Feb 26, 2018

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