diff --git a/src/components/input/input.vue b/src/components/input/input.vue
index 2d8498c..36456b0 100644
--- a/src/components/input/input.vue
+++ b/src/components/input/input.vue
@@ -201,6 +201,8 @@
             return {
                 currentValue: this.value,
                 prefixCls: prefixCls,
+                prepend: true,
+                append: true,
                 slotReady: false,
                 textareaStyles: {},
                 isOnComposition: false,
@@ -214,16 +216,6 @@
                 if (type === 'password' && this.password && this.showPassword) type = 'text';
                 return type;
             },
-            prepend () {
-                let state = false;
-                if (this.type !== 'textarea') state = this.$slots.prepend !== undefined;
-                return state;
-            },
-            append () {
-                let state = false;
-                if (this.type !== 'textarea') state = this.$slots.append !== undefined;
-                return state;
-            },
             showPrefix () {
                 let state = false;
                 if (this.type !== 'textarea') state = this.prefix !== '' || this.$slots.prefix !== undefined;
@@ -422,6 +414,13 @@
             }
         },
         mounted () {
+            if (this.type !== 'textarea') {
+                this.prepend = this.$slots.prepend !== undefined;
+                this.append = this.$slots.append !== undefined;
+            } else {
+                this.prepend = false;
+                this.append = false;
+            }
             this.slotReady = true;
             this.resizeTextarea();
             this.handleCalcIconOffset();
--
libgit2 0.21.4