Option to disable input placeholder text

[JasonWeill]

Problem

#13797 added a placeholder text string for input() calls. Developers would like the option to disable this.

Proposed Solution

Add an option to disable the placeholder on inputs.

Additional context

See also jupyter/notebook#7063.

[krassowski]

It is a reasonable idea to have it as a setting, thanks for opening an issue over here @JasonWeill.

@gianoddone if you or someone else would like to contribute, you can follow #13944 which added inputHistoryScope setting as it touches the same files and we would need to thread it down similarly. In my opinion this should be opt-out setting (so we should continue to show the placeholder by default).

[gianoddone]

Thanks for checking it out. I have used notebook to make some interactive math games and enjoy the simplicity of input(). I guess there are other ways that afford more control with widgets, but I got stuck looking for a setting to disable the placeholder--which is impressive by the way--just not what I needed in this case.

Not sure I am qualified to contribute just yet, but certainly appreciate the work you all are doing on this project!

[gigoiy]

I can contribute by adding this feature! I'll get working on this soon and open a PR.

[JasonWeill]

@gigoiy Thank you! Please leave a comment on this issue, or chat with us on Discourse or Gitter, if you need help. You can find our community resources here: https://jupyter.org/community

[krassowski]

For reference for anyone wishing to contribute, here is a related pull request which disabled placeholder for password prompts: #16128

[nitesh2920]

Is this still open? I would love to work on it. @krassowski @JasonWeill

[JasonWeill]

@nitesh2920 Thank you for your interest! It looks like #16713 would fix this. I just pinged @krassowski to ask about merging this PR in for Lab 4.4.0, after 4.3.0 is released.