引入 @element-plus/icons 并全局注册

src/main.js

@@ -10,6 +10,11 @@ app.use(router)
 
 import ElementPlus from 'element-plus'
 import 'element-plus/dist/index.css'
+import * as ElementIcons from '@element-plus/icons'
+// 将 element-plus 的图标库注册到全局
+for (var key in ElementIcons) {
+    app.component(`El${ElementIcons[key].name}`, ElementIcons[key])
+}
 import zhCn from 'element-plus/es/locale/lang/zh-cn'
 app.use(ElementPlus, {
     locale: zhCn,