last-child CSS selector not working in GAS with HtmlService?

Question

I have a script doGet where I use the HtmlService.createTemplateFromFile service to render a html file.

In the HTML template have a style entry in the header part:

<style>
  .subtopicp { margin: 5px 7px 5px 7px; border-bottom: 1px solid black;}
  .subtopicp:last-child { border-bottom: none;}
</style>

this works when I paste the evalueted HTML code in a file but in a GAS web app the .subtopicp:last-child line is never recognized.

Are CSS selectors like :last-child not usable in GAS HtmlService at all or is there a workaround for such things in Caja sanitized web apps?

Answer 1

:last-child is not in Caja's whitelist. You can request that it be added.