From 2f8a5799672fb33a5e4f39d406f191244d1b14db Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B3=A2=E6=AF=94=E5=B0=8F=E9=87=91=E5=88=9A?=
 <2890636389@qq.com>
Date: Thu, 3 Jun 2021 12:56:52 +0800
Subject: [PATCH] feat: use built-in throwError function. (#2131)

* feat: use built-in throwError function.

* Update index.vue

* Update index.vue
---
 packages/backtop/src/index.vue | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/backtop/src/index.vue b/packages/backtop/src/index.vue
index 4a30d0ac24..ee79d22cc6 100644
--- a/packages/backtop/src/index.vue
+++ b/packages/backtop/src/index.vue
@@ -21,6 +21,7 @@ import { defineComponent, ref, computed, onMounted, onBeforeUnmount } from 'vue'
 import throttle from 'lodash/throttle'
 import { on, off } from '@element-plus/utils/dom'
 import { easeInOutCubic } from '@element-plus/utils/animation'
+import throwError from '@element-plus/utils/error'
 
 interface IElBacktopProps {
   visibilityHeight: number
@@ -56,6 +57,7 @@ export default defineComponent({
     const visible = ref(false)
     const styleBottom = computed(() => `${props.bottom}px`)
     const styleRight = computed(() => `${props.right}px`)
+    const scope = 'ElBackTop'
 
     const scrollToTop = () => {
       const beginTime = Date.now()
@@ -88,7 +90,7 @@ export default defineComponent({
       if (props.target) {
         el.value = document.querySelector(props.target)
         if (!el.value) {
-          throw new Error(`target is not existed: ${props.target}`)
+          throwError(scope, `target is not existed: ${props.target}`)
         }
         container.value = el.value
       }