actionSubscribe()

Sometimes you may want to subscribe on functions calls.

Returns unsubscribe function.

• Type

declare function actionSubscribe(action: Function, cb: (unsubscribeFn: Function) => any): () => void;

• Params

action (required) - function inside reactive object.

cb (required) - callback that fires when action is called. cb has argument (unsubscribeFn) that unsubscribe of it.

actionUnsubscribe()

Same as actionSubscribe() but for unsubscribe.

Examples

Example #1

class State {    
    constructor() {
        reactive(this);
    }
    
    doSome = () => {
        // do some staff
        console.log('exec doSome');
    }
}

const state = new State();

const unsubscribeFn = actionSubscribe(state.doSome, (unsubscribe) => {
    console.log('actionSubscribe for doSome');
    // unsubscribe if needed and when needed
    // unsubscribe();
});

// unsubscribe if needed and when needed
// unsubscribeFn();

state.doSome();
state.doSome();

Output:

exec doSome
actionSubscribe for doSome
exec doSome
actionSubscribe for doSome