src/views/login/index.vue

@@ -14,6 +14,8 @@
                         <el-input
                             v-model="loginForm.username"
                             placeholder="请输入用户名"
+                            
+                            oninput="if(value.length>11)value=value.slice(0,11)" type="Number"  onkeyup="this.value = this.value.replace(/[^\d]/g,'');" 
                         >
                             <img
                                 slot="prefix"