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Basic Example# Computed properties allow us to declaratively compute derived values. However, there are cases where we need to perform "side effects" in reaction to state changes - for example, mutating the DOM, or changing another piece of state based on the result of an async operation. With Options API, we can use the watch option to trigger a function whenever a reactive property changes: ex..

Mixins Basics Mixins are a flexible way to distribute reusable functionalities for Vue components. A mixin object can contain any component options. When a component uses a mixin, all options in the mixin will be “mixed” into the component’s own options. Watch a video explanation on Vue Mastery Example: // define a mixin object var myMixin = { created: function () { this.hello() }, methods: { he..

// action from one moduleA to moduleB dispatch('moduleB/actionName', parameters, { root:true }) //Then it look for the action name and execute the command

Nuxt is the progressive Vue framework. It's a meta framework therefore it still uses Vue but with extra super powers to give you a more performant application and better developer experience. It is like Next.js but for Vue.js. Nuxt is built by the Chopin brothers and the first commit was made in October 2016. Although Nuxt is still open source it also has the NuxtJS company behind it as well as ..

Due to using a single state tree, all states of our application are contained inside one big object. However, as our application grows in scale, the store can get really bloated. To help with that, Vuex allows us to divide our store into modules. Each module can contain its own state, mutations, actions, getters, and even nested modules - it's fractal all the way down: const moduleA = { state: (..

Actions are similar to mutations, the differences being that: Instead of mutating the state, actions commit mutations. Actions can contain arbitrary asynchronous operations. Let's register a simple action: const store = createStore({ state: { count: 0 }, mutations: { increment (state) { state.count++ } }, actions: { increment (context) { context.commit('increment') } } }) Action handlers receive..

The only way to actually change state in a Vuex store is by committing a mutation. Vuex mutations are very similar to events: each mutation has a string type and a handler. The handler function is where we perform actual state modifications, and it will receive the state as the first argument: const store = createStore({ state: { count: 1 }, mutations: { increment (state) { // mutate state state..

Sometimes we may need to compute derived state based on store state, for example filtering through a list of items and counting them: computed: { doneTodosCount () { return this.$store.state.todos.filter(todo => todo.done).length } } If more than one component needs to make use of this, we have to either duplicate the function, or extract it into a shared helper and import it in multiple places ..

Where there is multiple state inside our component state, we use them. export default { data() { return { } }, computed: mapState({ students: state => state.students }), async created() { } }; When a component needs to make use of multiple store state properties or getters, declaring all these computed properties can get repetitive and verbose. To deal with this we can make use of the mapState h..

State# Single State Tree# Try this lesson on Scrimba Vuex uses a single state tree - that is, this single object contains all your application level state and serves as the "single source of truth." This also means usually you will have only one store for each application. A single state tree makes it straightforward to locate a specific piece of state, and allows us to easily take snapshots of ..