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TypeScript｜Object.keys

2022.09.01約 1 分鐘

TypeScript

解決 key 無法型別判斷的問題參考

const user = {
    name: 'James',
    age: 111
}

// solution 1
const keys1 = Object.keys(user) as Array<keyof typeof user>
keys1.forEach(key => {
    console.log(user[key])
})

// solution 2
const keys2 = Object.keys(user)
keys2.forEach(key => {
    console.log(user[key as keyof typeof user])
})