Does TCSS support the calc() function or a similar approach?

[Gu-f]

I hope to achieve it in a similar way as follows:

$customheight: 10;
.title {
      width: auto;
      height: calc($customheight - 2);
  }

[edward-jazzhands]

No unfortuantely the calc() function is not supported. If you want to calculate width with code you have to do it with Python in your Textual app. See here: https://textual.textualize.io/styles/width/#python

[willmcgugan]

As Edward said. I'd also add that you probably don't need it. If you explain what you are trying to accomplish, I suspect we can find a solution that uses existing CSS.