更新：增加“课程首页”功能

pages/book/detail.vue

@@ -317,16 +317,6 @@ function goToDetail(id: number) {
     url: `/pages/book/detail?id=${id}`
   })
 }
-
-function handleBack() {
-  if (pageFrom.value === 'order') {
-    uni.switchTab({
-      url: '/pages/index/index'
-    })
-  } else {
-    uni.navigateBack({ delta: 1 })
-  }
-}
 </script>
 
 <style lang="scss" scoped>