我正在通过异步函数获取登录名和密码值,并使用解构返回。但是,当我尝试在另一个函数中使用数据时,它输出-未定义。请帮忙。有什么问题
async function authWithLoginAndPassword() {
const response = await fetch('');
const data = await response.json();
const logUser = data[0].login;
const passwordUser = data[0].password;
return { logUser, passwordUser }
}
submit.addEventListener('click', () => {
let register = authWithLoginAndPassword();
console.log(register.logUser, register.passwordUser)
})
答案 0 :(得分:1)
所有buttons: [
'copyHtml5',
'excelHtml5',
'csvHtml5',
{
extend: 'pdf',
orientation: 'landscape',
exportOptions: {
columns: [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ]
}
}
]
函数都返回一个承诺,该承诺将解析为该函数中您async
的任何值。因此,当您调用return
时,必须使用authWithLoginAndPassword()
或.then()
来从函数返回的诺言中获取解析值:
await
或
submit.addEventListener('click', async () => {
try {
let register = await authWithLoginAndPassword();
console.log(register.logUser, register.passwordUser)
} catch(e) {
// catch errors
console.log(e);
}
});