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Avoiding explicit promise construction antipattern
function getUserDetail(username) {
if (userCache[username]) {
return Promise.resolve(userCache[username]);
// Use the fetch API to get the information
return fetch('users/' + username + '.json')
.then(function(result) {
userCache[username] = result;
return result;
.catch(function() {
throw new Error('Could not find user: ' + username);

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@justsml justsml commented Feb 4, 2016

Hey @domenic - Nice example of fetch - a really badly needed (native) Browser API.

I was curious to know your thoughts on @isaacs Promise-hatefest this month and my comment detailing Promise-based solutions.

Here's the sample code


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