使用 Vuex 4 在 Vue 3 中设置状态数据不起作用
Setting data in state not working in Vue 3 with Vuex 4
我正在使用 Vuex 4 学习 Vue 3,但我遇到了一些我很确定它很简单但我看不到的东西。
简而言之,我正在尝试在 state
中设置一些数据,以便在我的组件中使用它,但它不起作用。
让我给你看代码:
/// store.js
import { createStore } from 'vuex';
import axios from 'axios';
const store = createStore({
state: {
user: {},
products: []
},
mutations: {
SET_USER: (state, user) => {
state.user = user;
},
SET_PRODUCTS: (state, products) => {
state.products = products;
},
},
actions: {
GET_USER: async function ({ commit }) {
const user = await axios.get('https://coding-challenge-api.aerolab.co/user/me')
commit('SET_USER', user)
},
GET_PRODUCTS: async function ({ commit }) {
const products = await axios.get('https://coding-challenge-api.aerolab.co/products')
commit('SET_PRODUCTS', products)
},
}
})
export default store;
/// MyComponent.vue
<template>
<div class='bg-aerolab-main'>
{{ user }} {{ productsTest }}
</div>
</template>
import { computed } from "vue";
import { useStore } from 'vuex';
export default {
setup() {
const store = useStore();
const user = computed(() => store.state.user);
const productsTest = computed(() => store.state.products);
console.log(user);
console.log(productsTest);
return {
user,
productsTest
};
}
}
/// main.js
import { createApp } from 'vue'
import App from './App.vue'
import './index.css'
import axios from 'axios'
import VueAxios from 'vue-axios';
import store from './store';
const app = createApp(App)
app.use(VueAxios, axios)
app.use(store)
app.mount('#app')
当然 {{ users }}
和 {{ productsTest }}
绑定不显示任何数据,console.logs.
PD:我试图直接在我的组件中获取数据并且它正在工作,所以它与从 API.
获取的数据无关
您必须在 mounted 钩子中调度该操作:
import { computed , onMounted} from "vue";
import { useStore } from 'vuex';
export default{
setup() {
const store = useStore();
const user = computed(() => store.state.user);
const productsTest = computed(() => store.state.products);
onMounted(()=>{
store.dispatch('GET_USER');
store.dispatch('GET_PRODUCTS');
})
return {
user,
productsTest
};
}
}
从main.js
获取数据
如果您从组件中获取数据,我相信所选答案会正常工作。但是,如果您希望按照 OP 的要求 从 main.js
获取数据,或者如果您使用的是 Vue3,则 app.js
对于 Laravel,您应该在 createApp()
函数中使用 mounted()
。
const app = createApp({
mounted(){
store.dispatch('YOUR_ACTION') // GET_USER or GET_PRODUCTS in OP's case
}
});
记得在调用它之前设置您的 Vuex 存储,以便定义 store
。
在你的组件中
您可以访问the computed state with composition API,如下图:
import { computed } from "vue";
import { useStore } from "vuex";
setup() {
const store = useStore();
return {
products: computed(() => store.state.YOUR_STATE),
//replace YOUR_STATE with your own. In OP's case, it's user or products
};
}
我正在使用 Vuex 4 学习 Vue 3,但我遇到了一些我很确定它很简单但我看不到的东西。
简而言之,我正在尝试在 state
中设置一些数据,以便在我的组件中使用它,但它不起作用。
让我给你看代码:
/// store.js
import { createStore } from 'vuex';
import axios from 'axios';
const store = createStore({
state: {
user: {},
products: []
},
mutations: {
SET_USER: (state, user) => {
state.user = user;
},
SET_PRODUCTS: (state, products) => {
state.products = products;
},
},
actions: {
GET_USER: async function ({ commit }) {
const user = await axios.get('https://coding-challenge-api.aerolab.co/user/me')
commit('SET_USER', user)
},
GET_PRODUCTS: async function ({ commit }) {
const products = await axios.get('https://coding-challenge-api.aerolab.co/products')
commit('SET_PRODUCTS', products)
},
}
})
export default store;
/// MyComponent.vue
<template>
<div class='bg-aerolab-main'>
{{ user }} {{ productsTest }}
</div>
</template>
import { computed } from "vue";
import { useStore } from 'vuex';
export default {
setup() {
const store = useStore();
const user = computed(() => store.state.user);
const productsTest = computed(() => store.state.products);
console.log(user);
console.log(productsTest);
return {
user,
productsTest
};
}
}
/// main.js
import { createApp } from 'vue'
import App from './App.vue'
import './index.css'
import axios from 'axios'
import VueAxios from 'vue-axios';
import store from './store';
const app = createApp(App)
app.use(VueAxios, axios)
app.use(store)
app.mount('#app')
当然 {{ users }}
和 {{ productsTest }}
绑定不显示任何数据,console.logs.
PD:我试图直接在我的组件中获取数据并且它正在工作,所以它与从 API.
获取的数据无关您必须在 mounted 钩子中调度该操作:
import { computed , onMounted} from "vue";
import { useStore } from 'vuex';
export default{
setup() {
const store = useStore();
const user = computed(() => store.state.user);
const productsTest = computed(() => store.state.products);
onMounted(()=>{
store.dispatch('GET_USER');
store.dispatch('GET_PRODUCTS');
})
return {
user,
productsTest
};
}
}
从main.js
获取数据如果您从组件中获取数据,我相信所选答案会正常工作。但是,如果您希望按照 OP 的要求 从 main.js
获取数据,或者如果您使用的是 Vue3,则 app.js
对于 Laravel,您应该在 createApp()
函数中使用 mounted()
。
const app = createApp({
mounted(){
store.dispatch('YOUR_ACTION') // GET_USER or GET_PRODUCTS in OP's case
}
});
记得在调用它之前设置您的 Vuex 存储,以便定义 store
。
在你的组件中
您可以访问the computed state with composition API,如下图:
import { computed } from "vue";
import { useStore } from "vuex";
setup() {
const store = useStore();
return {
products: computed(() => store.state.YOUR_STATE),
//replace YOUR_STATE with your own. In OP's case, it's user or products
};
}