domvm.onevent

i’m thinking of adding a global domvm.onevent hook to mini+ builds to augment the “view reactivity” story. basically it would provide a way to hook into all event handlers in the app and allow you to add a root auto-redraw or whatever.

due to it being global, this is something that can be used by apps at the top level, but should not be used by reusable/composable components.

it would default to a no-op, but can be overwritten to something like…

domvm.onevent = function(e, result, vm, node) {
    rootVm.redraw();
};

result is the return value of the bound event handler, so could be a Promise if the event resulted in eg. an async xhr/fetch request, so any redraw() can be chained to it, as needed. not sold on the argument order yet, but seems sane enough.

[leeoniya]

okay, a global onevent should definitely have a consistent signature; arg-testing would be a giant clusterfuck. i still want to pass through parameterized args if they’re provided, so [e, node, getVm(node)].concat(args) looks like a winner. i’ll consider changing the parameterized event handler sig to match this in a future version,

[leeoniya]

implemented in 6bcdfa423cc3c5ee8f2cf9da48cf8d0e39aa93b8 as domvm.config({onevent: (e, node, vm, ...args) => {...}}). demo: https://rawgit.com/leeoniya/domvm/2.x-dev/demos/global-onevent.html