let
const
destructuring
字符串的擴展
數值的擴展
對象的擴展
Promise
const promise = new Promise ((resolve, rereject) => {
if (/* 異步操作成功 */){
return resolve(value);
} else {
return reject(error);
}
})
promise.then((value) => {
// success
}, (error) => {
// failure
});