there is no event handling inside VElement

# kmdc

[Robert Jaros]

there is no event handling inside VElement

[Big Chungus]

It's implemented as a module. Handlers themselves are stored in moduleData oblect and managed by the module. Theres "on" helper dsl function

[Big Chungus]

Or just use kotlinx-html handles

[Robert Jaros]

It won't be that simple in KVision

[Big Chungus]

You can push it directly to module data if you want. Each VElement has getModuleData function to fetch component's module data for each module

[Robert Jaros]

it's integrated with snabbdom kotlin bindings and this interface:
https://github.com/gbaldeck/snabbdom-kotlin/blob/master/src/main/kotlin/com/github/snabbdom/eventlisteners.kt#L17

[Robert Jaros]

probably it can be copied

[Robert Jaros]

and somehow remapped to kvdom "on"

[Big Chungus]

There's an equivalent in kotlinx-html. I can find it for you tomorrow when I get back to my pc

[Robert Jaros]

I wonder if it's a good idea to mix kotlinx-html and kvision dsl in one project

[Robert Jaros]

what is kvdom-dom ?

[Robert Jaros]

a multiplatform abstraction of the real dom?

[Robert Jaros]

do I understand correctly that only kvdom-core is required for integration with JS project like kvision?

[Big Chungus]

Kvdom-dsl is optional

[Big Chungus]

Kvdom-dom brings kotlinx dom bindings to common sourceSet and typealiases it back on js while providing implementations on wasm

[Big Chungus]

kvdom-core is the only required dependency (which itself depends on kvdom-dom)

[Big Chungus]

@Robert Jaros can you send me a link to kvision code that interacts with these event handling hooks?

[Robert Jaros]

https://github.com/rjaros/kvision/blob/d2a255759f39dfd9fe7727a62dfffbe21bed2d6d/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt#L284
https://github.com/rjaros/kvision/blob/d2a255759f39dfd9fe7727a62dfffbe21bed2d6d/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt#L381

[Robert Jaros]

basically every widget has this map of listeners
https://github.com/rjaros/kvision/blob/d2a255759f39dfd9fe7727a62dfffbe21bed2d6d/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt#L62

[Robert Jaros]

two such maps to be accurate

[Robert Jaros]

and these maps are converted to snabbdom event listeners

[Robert Jaros]

those are maps of maps of functions to allow multiple listeners

[Robert Jaros]

ant the whole code is complicated as hell 🙂

[Robert Jaros]

that's because snabbdom-kotlin bindings don't have simple addListener(String, (Event) -> Unit) function, but this type safe On interface.

[Big Chungus]

Looks like kvdom might make things easier in this regard