[Improvement] Actionsheet: support lazy render (#1365)

packages/popup/index.vue

@@ -1,6 +1,6 @@
 <template>
   <transition :name="currentTransition">
-    <div v-if="inited || !lazyRender" v-show="value" :class="b({ [position]: position })">
+    <div v-if="shouldRender" v-show="value" :class="b({ [position]: position })">
       <slot />
     </div>
   </transition>
@@ -17,10 +17,6 @@ export default create({
 
   props: {
     transition: String,
-    lazyRender: {
-      type: Boolean,
-      default: true
-    },
     overlay: {
       type: Boolean,
       default: true
@@ -35,22 +31,10 @@ export default create({
     }
   },
 
-  data() {
-    return {
-      inited: this.value
-    };
-  },
-
   computed: {
     currentTransition() {
       return this.transition || (this.position === '' ? 'van-fade' : `popup-slide-${this.position}`);
     }
-  },
-
-  watch: {
-    value() {
-      this.inited = this.inited || this.value;
-    }
   }
 });
 </script>