Menu
I need to change this script from js to ts but i need syntax of watchers
export default {
props: ['branch_id'],
watch: {}
}
967
A watcher in Vue is a special feature that allows us to observe some data and perform specific actions when it changes. It is a more generic way to observe and react to data changes in the Vue instance.
Deep watcher over array of objects. vue , we have to import it in the App. vue file and pass users as a prop . In User. vue , we are using watcher over the value which is changing and we are also using user.name property instead of user so that vue can detect the change happening to user.name .
Vue is written in TypeScript itself and provides first-class TypeScript support. All official Vue packages come with bundled type declarations that should work out-of-the-box.
ref is a special attribute, similar to the key attribute discussed in the v-for chapter. It allows us to obtain a direct reference to a specific DOM element or child component instance after it's mounted.
First you have to declare your variable, like myProperty in this case, and then you have to make a @Watch('myProperty') to make the actual watcher for that specific variable.
@Component
export default class App extends Vue {
myProperty: string
@Watch('myProperty')
onPropertyChanged(value: string, oldValue: string) {
// Do stuff with the watcher here.
}
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
