如何访问 JavaScript 中符号类型 object 内的属性？

Question

const classRomm = {
    [Symbol('Mia')]: { grade: 50, gender: 'female' },
    [Symbol('Gilbert')]: {grade: 80, gender: 'male'},
};

let persons =  Object.getOwnPropertySymbols(classRomm);

for(let i of persons) {
    console.log(i);
}

In above, the for of loop returns Symbol(Mia) and Symbol(Gilbert) . But these are not accessible. I want to reach grade and gender property but I can not do that. How can I do it?

Answer 1

You need to take the collected symbols as accessor for the object.

 const classRoom = { [Symbol('Mia')]: { grade: 50, gender: 'female' }, [Symbol('Gilbert')]: {grade: 80, gender: 'male'}, }; let persons = Object.getOwnPropertySymbols(classRoom); for (const person of persons) console.log(classRoom[person]);