[英]I want to make the callback wait for the response before executing the next lines of code
I want to make the callback wait for the response before executing the next lines of code.我想让回调在执行下一行代码之前等待响应。 I did try to make the callback async
then await
for the response, but that didn't work.我确实尝试使回调async
然后await
响应,但这不起作用。
async signup(parent, args, ctx, info) {
const email = args.email;
let res;
verifier.verify(email, function(err, response) {
if (err) console.log(err);
else {
res = response.success;
console.log('before', res); // true or false
}
});
console.log('after', res); // undefined
}
async function signup (parent, args) {
return new Promise(function(resolve, reject) {
verifier.verify(args.email, function(err, response) {
if (err) {
reject(err);
}
else {
resolve(response.success);
}
});
});
}
Create a function and execute it after getting response创建一个function,得到响应后执行
async signup(parent, args, ctx, info) {
const email = args.email;
let res;
verifier.verify(email, function(err, response) {
if (err) console.log(err);
else {
res = response.success;
console.log('before', res); // true or false
nextfun(res)
}
});
}
function nextfun(res) {
console.log(res)
}
async signup(parent, args, ctx, info) {
let res = await new Promise(function(resolve, reject) {
verifier.verify(args.email, function(err, response) {
if (err) {
reject(err);
} else {
resolve(response.success);
}
});
});
console.log('after', res); // response.success
}
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