[Nuxt] Build a Vue.js Form then use Vuex Actions to Post to an API in Nuxt
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The default behavior of submitting an HTML form is to reload the page. You can use the Vue.js @submit.prevent syntax to avoid that behavior. Then wire together the @submitevent with an add Vuex action to handle an async post to an api. This lesson walks you through posting to an API using Vue.js, Vuex. and Nuxt.
<
template
>
<
form
@submit
="onSubmit(task)"
>
<
input
v-model
="task"
type
="text"
/>
</
form
>
</
template
>
<
script
>
import { mapState, mapActions } from
‘
vuex
‘
import {init} from
‘
./shared
‘
export
default
{
fetch: init,
computed: {
...mapState({
todos: (state)
=>
state.todos
})
},
data () {
return
{
task:
‘
Some data
‘
}
},
methods: {
onSubmit(task) {
alert(task)
}
}
}
</
script
>
Notice that after reload the page, when the form submit, the page reloads.
To prevent page reloads every time we submit the form we can use:
<
form
@submit.prevent
="onSubmit(task)"
>
To deal with the store, we can use ‘actions‘ in Vuex.Store and ‘mapActions‘ helpers:
<
template
>
<
div
>
<
form
@submit.prevent
="add(task)"
>
<
input
v-model
="task"
type
="text"
/>
</
form
>
<
article
class
="pa3 pa5-ns"
>
<
ul
class
="list pl0 ml0 center mw6 ba b--light-silver br2"
>
<
li
v-for
="todo of todos"
class
="ph3 pv3 bb b--light-silver"
>{{todo.task}}</li></ul></article></div></template><script>
import { mapState, mapActions } from ‘vuex‘
import {init} from ‘./shared‘
export default {
fetch: init,
computed: {
...mapState({
todos: (state) => state.todos
})
},
data () {
return {
task: ‘Some data‘
}
},
methods: {
...mapActions([
‘add‘
])
}
}
</script>
We change form submit to:
<
form
@submit.prevent
="add(task)"
>
The ‘add‘ method map to action in store:
import Vuex from‘vuex‘ import axios from‘axios‘const store = () => new Vuex.Store({ state: { todos: [ ] }, mutations: { init (state, todos) { state.todos = todos }, add (state, todo) { state.todos = [ ...state.todos, todo ] } }, actions: { async add (context, task) { const commit = context.commit const res = await axios.post(‘https://todos-cuvsmolowg.now.sh/todos‘, { task, complete: false }) commit(‘add‘, res.data) } } }) export default store
Inside, add function, we post the data to the backend, then we can use ‘commit‘ method to mutate the data in the store.
原文：http://www.cnblogs.com/Answer1215/p/7236441.html
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