const myPlugin = store => {
// 当 store 初始化后调用
store.subscribe((mutation, state) => {
// 每次 mutation 之后调用
// mutation 的格式为 { type, payload }
});
};
const store = new Vuex.Store({
// ...
plugins: [myPlugin]
});
二、编写一个打印日志的插件
import _ from 'lodash';
function logger() {
return function(store) {
let prevState = store.state;
store.subscribe((mutations, state) => {
console.log('prevState', prevState);
console.log(mutations);
console.log('currentState', state);
prevState = _.cloneDeep(state);
});
};
}
export default new Vuex.Store({
modules: {
...
},
strict: true,
plugins: process.NODE_ENV === 'production' ? [] : [logger()]
});
三、vuex
数据持久化
function vuexLocal() {
return function(store) {
const local = JSON.parse(localStorage.getItem('myvuex')) || store.state;
store.replaceState(local);
store.subscribe((mutations, state) => {
const newLocal = _.cloneDeep(state);
sessionStorage.setItem('myvuex', JSON.stringify(newLocal));
});
};
}
export default new Vuex.Store({
modules: {
...
},
strict: true,
plugins: process.NODE_ENV === 'production' ? [vuexLocal()] : [logger(), vuexLocal()]
});