if 中相同变量的判断
当需要判断一个 变量 是否在数组中时,不妨使用 includes 方法试试看。
👎 bad code
TypeScript
const validate = (user: string): boolean => {
if (user == '小明' || user == '小王' || user == '小李' ···) {
return true;
}
return false;
}
👍 good code
TypeScript
const validate = (user: string): boolean => {
const effectiveValue: string[] = ['小明', '小王', '小李']
if (effectiveValue.includes(user)) {
return true
}
return false
}