带有枚举值的Ecmascript函数参数

Question

Ecmascript方法中是否可以具有参数的enum值？

例如这种情况

export const testFunc = (param1) => {

};

例如，param只能取"val1","val2","val3"的值

export const testFunc = (param = {"val1","val2","val3"}) =>{

};

Answer 1

JS中没有枚举之类的东西，但是您可以检查参数是否为允许的值之一：

export const testFunc = (param) =>{
  if (!["val1","val2","val3"].includes(param)) {
    throw new Error('Invalid param passed');
  }
  // rest of function
};