Update setting.ts

src/views/tempo-practice/setting.ts

@@ -81,7 +81,7 @@ export const randomScoreElement = (element?: string) => {
 };
 
 /** 设置元素方向 */
-export const elementDirection = (type: string, index) => {
+export const elementDirection = (type: string, index: number) => {
   const prefix = setting.element === 'jianpu' ? 'j-' : 'f-';
   let ele = '';
   let i = index;