init

fuintUniapp/components/mixins/observer/behavior.js

@@ -0,0 +1,47 @@
+function setAsync(context, data) {
+    return new Promise(resolve => {
+        context.setData(data, resolve);
+    });
+}
+;
+export const behavior = Behavior({
+    created() {
+        if (!this.$options) {
+            return;
+        }
+        const cache = {};
+        const { computed } = this.$options();
+        const keys = Object.keys(computed);
+        this.calcComputed = () => {
+            const needUpdate = {};
+            keys.forEach(key => {
+                const value = computed[key].call(this);
+                if (cache[key] !== value) {
+                    cache[key] = needUpdate[key] = value;
+                }
+            });
+            return needUpdate;
+        };
+    },
+    attached() {
+        this.set();
+    },
+    methods: {
+        // set data and set computed data
+        set(data, callback) {
+            const stack = [];
+            if (data) {
+                stack.push(setAsync(this, data));
+            }
+            if (this.calcComputed) {
+                stack.push(setAsync(this, this.calcComputed()));
+            }
+            return Promise.all(stack).then(res => {
+                if (callback && typeof callback === 'function') {
+                    callback.call(this);
+                }
+                return res;
+            });
+        }
+    }
+});