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                本節按先前臺再后臺的開發流程完成課程的新增功能,主要實現的功能如下: 1. 課程名稱不能為空,最小長度為2。課程名不能重復 2. 輸入課程名稱時,實時的在前臺顯示出該課程名稱的可用狀態。 3. 可以為課程選擇一個負責教師,也可以不選 4. 可以為課程選擇對應的多個班級,也可以不選 ![](https://img.kancloud.cn/07/8d/078d71da02572c28f6516f5c9026c059_445x345.png)
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