XF 2.3 Secure Custom PWA Install Trigger

[Vitya]

Hello,

I'm setting up a 728x90 header banner (using pre-built ad templates) for users to install our site PWA upon clicking it.

Since I am unfamiliar with coding, I want to use the most secure approach rather than relying on custom workarounds.

Please guide me the correct, most secure way to add a custom PWA install trigger to my ad banner.

Just FYI I experimented with the following code but it seems to have security concerns:



Thank you