框架:angular 7+ angular material;
如圖,使用new FormGroup();
此時可能遇到的問題有:
問題一:
這個是因爲你沒有引入forms的相關模塊:
如上圖所示,即可解決該問題。
···························································································································
問題二:
這個是因爲,寫法出現了錯誤:
這裏不應該帶[ ]方括號,正確的寫法應該如下圖: