# TypeScript function 傳入自定義字串

使用 enum: function

// 如果需要傳入自訂的字串

enum CARDTYPE {
  I = 'I',
  R = 'R',
}

function squareOf(idNumber: string, type: CARDTYPE): boolean {
  console.log(idNumber)
  return type === 'R' || false
}

squareOf('A123', CARDTYPE.I)

使用 type

type CARDTYPE = 'I' | 'R'

function squareOf(idNumber: string, type: CARDTYPE): boolean {
  console.log(idNumber)
  return type === 'R' || false
}
squareOf('A123',"")

輸入 "" 時，會出現 select 面板唷