javascript promise chain
// base case
promise
.then(...)
.then(...)
.then(...)
.catch(...)
//real world
coinflip(10)
.then(betAgain)
.then(betAgain)
.then(betAgain)
.then(result => {
console.log(`OMG, WE DID THIS! TIME TO TAKE ${result} HOME!`);
})
.catch(handleRejection);const promise2 = doSomething().then(successCallback, failureCallback);
new Promise(function(resolve, reject) {
setTimeout(() => resolve(1), 1000); // (*)
}).then(function(result) { // (**)
alert(result); // 1
return result * 2;
}).then(function(result) { // (***)
alert(result); // 2
return result * 2;
}).then(function(result) {
alert(result); // 4
return result * 2;
});
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