const syb1 = Symbol(1);
const syb2 = Symbol(1);
const sybObj = {
    sybobj1: 1,
    [syb1]: syb1,
    [syb2]: syb2
};
/* 获取对象的KEY */
for (let key in sybObj) {
    console.log(key);
}
// key 没有symbol
/* getOwnPropertyNames */
console.log(Object.getOwnPropertyNames(sybObj));
// getOwnPropertyNames 获取不到symbol
/* getOwnPropertySymbols */
console.log(Object.getOwnPropertySymbols(sybObj));
//getOwnPropertySymbols 获取到symbol 但是获取不到别的KEY
//es 新增
let sybkey = Reflect.ownKeys(sybObj);
console.log(sybkey);