add 《Vuex状态管理的工作原理》

Author: answershuto

《Vuex状态管理的工作原理》.js

@@ -0,0 +1,40 @@
+let Vue;
+
+class Store {
+    constructor () {
+        this._vm = new Vue({
+            data: {
+                $$state: this.state
+            }
+        })
+    }
+
+    commit (type, payload, _options) {
+        const entry = this._mutations[type];
+        entry.forEach(function commitIterator (handler) {
+            handler(payload);
+        });
+    }
+
+    dispatch (type, payload) {
+        const entry = this._actions[type];
+
+        return entry.length > 1
+        ? Promise.all(entry.map(handler => handler(payload)))
+        : entry[0](payload);
+    }
+}
+
+function vuexInit () {
+    const options = this.$options;
+    if (options.store) {
+        this.$store = options.store;
+    } else {
+        this.$store = options.parent.$store;
+    }
+}
+
+export default install (_Vue) {
+    Vue.mixin({ beforeCreate: vuexInit });
+    Vue = _Vue;
+}