Testing or checking javascript-templates

[perlchamp]

Hi everbody,
in the HA-developer tools it is possible to create, test or check jinja-templates. I would like to have the possibility to create, test or check javascript-code, -lines or -templates, too. I would like the way to change the sections between jinja and javascript p.ex. via button under developer tools->templates.
Many thanks in advance!

So long
Pc

[karwosts]

Home assistant does not support javascript templates anywhere, so it would be a bit odd to have a tool to test them.

Is there even a consistent agreement for what a javascript template is, or is that something just implemented using its own unique language in each custom card?

You can of course always test plain javascript in the browser console (Ctrl-Shift-I). Maybe that does what you need.

[perlchamp]

Thank you very much. You're welcome!

[...] so it would be a bit odd to have a tool to test them.

I'm on your site.

Is there even a consistent agreement for what a javascript template is, or is that something just implemented using its own unique language in each custom card?

Me personally, i don't like javascript and i don't know, if i have seen an official add-on (or whatever) which uses javascript for value-templating, but i did see it in some configuration files. I did see something like this for value-manipulation:
${entity.attributes.temperature ? entity.attributes.temperature + " °C" : "--"}

This causes my request and forces the next question:
Is it possible to use jinja instead of javascript in these files or is that different by the add-ons or files themselves?

Many thanks in advance !

[perlchamp]

This is probably taken from examples of a custom:button-card which does support JS and does not support jinja.

No, it's not taken from the button-card, but i think this makes no difference, because it's taken from another custom-card ;-).
And i understand that for these things the HA-developer don't have any motivation to add something like a js-editor as they did with jinja-editor.

So, the answer is "no" [...]

ok.
But does that mean generally, that in files where js is used for value-templating jinja doesn't work there? What is your experience by that ?

[perlchamp]

[...]I would suggest to create a thread in Community & ask there [...]

uuhhhhhhhh. OK. I personally don't like that, cause these are depending things...
It's like HA. For one step one sensor or many triggers and automations, lol.