Why do I get this error:
Error [vuex] Do not mutate vuex store state outside mutation handlers.
What does it mean?
It happens when I try to type in the edit input file.
pages/todos/index.vue
<template>
<ul>
<li v-for="todo in todos">
<input type="checkbox" :checked="todo.done" v-on:change="toggle(todo)">
<span :class="{ done: todo.done }">{{ todo.text }}</span>
<button class="destroy" v-on:click="remove(todo)">delete</button>
<input class="edit" type="text" v-model="todo.text" v-todo-focus="todo == editedTodo" @blur="doneEdit(todo)" @keyup.enter="doneEdit(todo)" @keyup.esc="cancelEdit(todo)">
</li>
<li><input placeholder="What needs to be done?" autofocus v-model="todo" v-on:keyup.enter="add"></li>
</ul>
</template>
<script>
import { mapMutations } from 'vuex'
export default {
data () {
return {
todo: '',
editedTodo: null
}
},
head () {
return {
title: this.$route.params.slug || 'all',
titleTemplate: 'Nuxt TodoMVC : %s todos'
}
},
fetch ({ store }) {
store.commit('todos/add', 'Hello World')
},
computed: {
todos () {
// console.log(this)
return this.$store.state.todos.list
}
},
methods: {
add (e) {
var value = this.todo && this.todo.trim()
if (value) {
this.$store.commit('todos/add', value)
this.todo = ''
}
},
toggle (todo) {
this.$store.commit('todos/toggle', todo)
},
remove (todo) {
this.$store.commit('todos/remove', todo)
},
doneEdit (todo) {
this.editedTodo = null
todo.text = todo.text.trim()
if (!todo.text) {
this.$store.commit('todos/remove', todo)
}
},
cancelEdit (todo) {
this.editedTodo = null
todo.text = this.beforeEditCache
},
},
directives: {
'todo-focus' (el, binding) {
if (binding.value) {
el.focus()
}
}
},
}
</script>
<style>
.done {
text-decoration: line-through;
}
</style>
stores/todos.js
export const state = () => ({
list: []
})
export const mutations = {
add (state, text) {
state.list.push({
text: text,
done: false
})
},
remove (state, todo) {
state.list.splice(state.list.indexOf(todo), 1)
},
toggle (state, todo) {
todo.done = !todo.done
}
}
Any ideas how I can fix this?
It could be a bit tricky to use v-model on a piece of state that belongs to Vuex.
and you have used v-model
on todo.text
here:
<input class="edit" type="text" v-model="todo.text" v-todo-focus="todo == editedTodo" @blur="doneEdit(todo)" @keyup.enter="doneEdit(todo)" @keyup.esc="cancelEdit(todo)">
use :value
to read value and v-on:input
or v-on:change
to execute a method that perform the mutation inside an explicit Vuex mutation handler
This issue is handled here: https://vuex.vuejs.org/en/forms.html