Why the plugin chrome returns undefined?

Question

Why the plugin chrome returns undefined?

function show(){
 return chrome.storage.sync.get('AWSAccessKeyId',function(result){
 return result.AWSAccessKeyId;
});
}

var item = show();
alert(item)

returns undefined

JavaScript

jabari_Bayer91 asked July 8th 19 at 16:28

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More answers about "Why the plugin chrome returns undefined?"

1 answer

aniya answered on · Accepted Answer · 2019-07-08T16:30:59.534Z

getAWSAccessKeyId function() {
 return new Promise(function (resolve, reject) {
 chrome.storage.sync.get('AWSAccessKeyId', function (result) {
resolve(result.AWSAccessKeyId);
});
});
}

getAWSAccessKeyId.then(alert);

getAWSAccessKeyId function(cb){
 chrome.storage.sync.get('AWSAccessKeyId', function () {
cb(result.AWSAccessKeyId);
});
}

getAWSAccessKeyId(function(AWSAccessKeyId){
alert(AWSAccessKeyId);
});

Async function ...blah-blah-blah... at the time the return result is not yet known ...blah-blah-blah... use colbecki or promises ...blah-blah-blah... read learn.javascript.ru...

PS Today seems to be the first to ask a question about async in js
P. P. S. does anyone have a link to reference the answer to this question? Throw in comments to same not to write every time.