withLatestFrom supports multiple observables: .withLatestFrom(source1, source2, source3) .map((data) => { console.log(data) }); -> [val, value1, value2, value3] It also supports function as it’s last parameter, so you can get values other than arrays: observable$ .withLatestFrom(source1, source2, (val, one, two) => { return {val: val, one: one, two: two}; });
The @ngrx/router-store exists so that it’s possible for the store to be the single source of truth for an application’s routing state. Without it, there would be application state – the current route – not represented in the store. That means time-travel debugging using the DevTools would not be possible, as there would be no … Read more
You are correct; switchMap will unsubscribe from the Observable returned by its project argument as soon as it has invoked the project function again to produce a new Observable. RxJs is incredibly powerful and dense, but its high level of abstraction can sometimes make code hard to understand. Let me debunk the marble diagrams and … Read more
Even though your question is primarily opinion-based, I can give you some ideas why ngrx is a good choice. Despite people saying that it’s not a good idea to have all of your application state in one single object (Single State Tree). However, in my opinion your state will be there regardless. With a store … Read more
Please consult “real world” example from Redux repo. It shows the solution to exactly this problem. Your state shape should look like this: { entities: { users: { 1: { id: 1, name: ‘Dan’ }, 42: { id: 42, name: ‘Mary’ } } }, visibleUsers: { ids: [1, 42], isFetching: false, offset: 0 } } … Read more
The three dots are known as the spread operator from Typescript (also from ES7). The spread operator return all elements of an array. Like you would write each element separately: let myArr = [1, 2, 3]; return [1, 2, 3]; //is the same as: return […myArr]; This is mostly just syntactic sugar as it compiles … Read more
Original answer for @ngrx/store v1.x @ngrx/store extends BehaviorSubject and it has a value property you can use. this._store.value that will be the current state of your app, and from there you can select properties, filter, map etc… update: Took me a while to figure what’s what in your example (: To get current value of … Read more