diff --git a/.github/workflows/yarn.js.yml b/.github/workflows/yarn.js.yml
index 27b79c8026..e9b17f3965 100644
--- a/.github/workflows/yarn.js.yml
+++ b/.github/workflows/yarn.js.yml
@@ -20,5 +20,7 @@ jobs:
         uses: actions/setup-node@v1
       - name: Install dependencies
         run: yarn install --frozen-lockfile
+      - name: Lint
+        run: yarn lint
       - name: Test
         run: yarn test
diff --git a/packages/avatar/src/index.vue b/packages/avatar/src/index.vue
index 4f64a5aa14..9a7fee7e75 100644
--- a/packages/avatar/src/index.vue
+++ b/packages/avatar/src/index.vue
@@ -5,7 +5,7 @@
       :src="src"
       :alt="alt"
       :srcset="srcSet"
-      :style="fitStyle"
+      :style="{objectFit: fit}"
       @error="handleError"
     >
     <i v-else-if="icon" :class="icon"></i>
@@ -83,7 +83,6 @@ export default defineComponent({
     }
     return {
       hasLoadError, avatarClass, sizeStyle, handleError,
-      fitStyle,
     }
   },
 })
diff --git a/packages/breadcrumb/src/index.vue b/packages/breadcrumb/src/index.vue
index 46054b2bab..056d493391 100644
--- a/packages/breadcrumb/src/index.vue
+++ b/packages/breadcrumb/src/index.vue
@@ -13,8 +13,8 @@
 import { defineComponent, provide, ref, onMounted } from 'vue'
 
 interface IBreadcrumbProps {
-  separator: string;
-  separatorClass: string;
+  separator: string
+  separatorClass: string
 }
 
 export default defineComponent({
diff --git a/packages/breadcrumb/src/item.vue b/packages/breadcrumb/src/item.vue
index c056e09327..2a87fa2fe0 100644
--- a/packages/breadcrumb/src/item.vue
+++ b/packages/breadcrumb/src/item.vue
@@ -17,13 +17,13 @@ import { defineComponent, inject, ref, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 
 interface IBreadcrumbInject {
-  separator: string;
-  separatorClass: string;
+  separator: string
+  separatorClass: string
 }
 
 interface IBreadcrumbItemProps {
-  to: string | Record<string, unknown>;
-  replace: boolean;
+  to: string | Record<string, unknown>
+  replace: boolean
 }
 
 export default defineComponent({
diff --git a/packages/utils/types.ts b/packages/utils/types.ts
index 61ba0ef75e..d285ba805a 100644
--- a/packages/utils/types.ts
+++ b/packages/utils/types.ts
@@ -1,16 +1,16 @@
-type OptionalKeys<T extends object> = {
+type OptionalKeys<T extends Record<string, unknown>> = {
   [K in keyof T]: T extends Record<K, T[K]>
     ? never
     : K
 }[keyof T]
 
-type RequiredKeys<T extends object> = Exclude<keyof T, OptionalKeys<T>>
+type RequiredKeys<T extends Record<string, unknown>> = Exclude<keyof T, OptionalKeys<T>>
 
 type MonoArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg?: T[K]) => void
 
 type BiArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg: T[K]) => void
 
-export type EventEmitter<T extends object> =
+export type EventEmitter<T extends Record<string, unknown>> =
   MonoArgEmitter<T, OptionalKeys<T>> & BiArgEmitter<T, RequiredKeys<T>>
 
-type A = Required<{}>
+type A = Required<Record<string, unknown>>