main.js中
import Vuex from 'vuex'
Vue.use(vuex);
const store = new Vuex.store({
state: {
nickName: "",
cartCount: 0
},
mutations: {
updateUserInfo(state,nickName) {
state.nickName = nickName;
},
updateCartCount(state,cartCount) {
state.cartCount += cartCount;
}
},
actions: {
updateUserInfo(context) {
context.commit("updateUserInfo");
},
updateCartCount(context) {
context.commit("updateCartCount");
}
}
})
new Vue({
el: "#app",
store,
router,
template: '<App/>',
components: {App}
})
组件中：
methods: {
increment(){
this.$store.dispatch("updateUserInfo", 'nick'); //this.$store.commit("increment", 'nick');
},
decrement() {
this.$store.dispatch("updateCartCount", 1); // this.$store.commit("decrement", 1);
}
}
区别：
dispatch：含有异步操作，例如向后台提交数据，写法： this.$store.dispatch('mutations方法名',值)
commit：同步操作，写法：this.$store.commit('mutations方法名',值)