.sync modifier about ngvue

[jaredmcateer]

Hi @itomtom, modifiers are not supported as far as I can tell*, currently you'd have to write the binding using the prop/emit method. I'd be happy to accept a PR if you're willing to work on it though.

It seems like events with colons don't work I did a test using the example server where I modified updateFirstName in index.js to emit new-first-name:test and then in the index.html I modified the angular directive to use v-on-new-first-name:test and clicking the button nothing happens.

* Disclaimer: I'm currently trying to maintain this package but I am not an expert on its code base yet, I'm just another person trying to migrate our legacy angular app to Vue.

[jaredmcateer]

I know this is quite late but in trying to figure out Composition API support I was also looking at the code to see if this is something I could add support for and realized that angular normalizes attributes

e.g.,
v-on-foo:bar
v-on-foo_bar
v-on-fooBar

all get normalized to vOnFooBar, which makes it problematic to support colon separated events.

Vue 3 has also dropped .sync and reworked v-model to support 2 way bindings. I think if someone were to implement this in ngVue it would be to emulate Vue 3's style by adding a v-model-<propName>="<boundData>"