javascript 枚举以转换为列表并检查该枚举中是否存在该值

Question

lets say i have an enum in javascript defined like this:

const myEnum = {
    A:'a',
    B:'b',
    C:'c',
    D:'d'
};

I have a character and I need to check whether it is present in the enum or not.

currently, I'm doing something like

if(value !== myEnum.A || value !==myEnum.B || ......) {
   //FAILURE
}

this is something of a problem how do I make it something like:

if(value not in myEnum.values){
   //FAILURE
}

Answer 1

you can use Object.values to check this

if (!Object.values(myEnum).includes(value)) {
    // Do what you want here
}

 const myEnum = { A: 'a', B: 'b', C: 'c', D: 'd' }; console.log(Object.values(myEnum).includes('a')); console.log(Object.values(myEnum).includes('v'));