First I'd start with either DWL, Hyprland, or possibly Sway, then read the documentation re-creating everything as close as possible. (◠‿◕)
All the features are there, just glue it yourself. Just the same way you'd convert those same configs to an i3 & DWM equivalent.
If you can't deal with that and want a 1:1 WM, then you'll just have to build it yourself or convince one of the other 3 people who still use FVWM to do it.
Do these things allow me to define functions and to call them on focus change, on windowshade, on iconification, on other events? Can I evaluate text returned by a command spawned in those as part of my config, at any moment? Can these functions differentiate between windows by mask? By state? BTW, can I have custom states? Can I have conditionals there? Schedule those functions? Change that schedule?
Just the same way you’d convert those same configs to an i3 & DWM equivalent.
I wouldn't. These are different things for a different workflow.
Do these things allow me to define functions and to call them on focus change, on windowshade, on iconification, on other events? Can I evaluate text returned by a command spawned in those as part of my config, at any moment? Can these functions differentiate between windows by mask? By state? BTW, can I have custom states? Can I have conditionals there? Schedule those functions? Change that schedule?
Yes.
I wouldn't. These are different things for a different workflow.
And nobody cares about your workflow, sorry. Go convince one of 3 other people to make your 1:1 equivalent.
Where there?
Consult the official documentation and community configs, etc. It not that fuckin hard dude.
I know you are not an adult.
You're the one who immediately started name calling trying to "correct" me with incorrect nonsense in a different thread, dumbass. Not to mention, "luddite" wasn't even directed at you personally, you applied it to yourself.
Do it yourself whiner, I'm not going to convert your 555ln of crap into an equivalent config with all the equivalent necessary add-ons and plug-ins for you. Go ask ChatGPT because an AI is the only thing that'll be able to stand you. You can stay with your abandonware for all eternity for all I care, I'm busy doing things that are much more productive then wasting my time helping an ungrateful egomaniac (e.g. literally anything else).
Never said I would, nor do you even deserve such kindness. I'm not about to spend 3+ hours building and fine tweaking a config for an asshole that publicly goatees itself on the internet.
If you're lazy, don't be a little shit too. choosing beggars get nowhere.