promise states code example
Example 1: promise states javascript
// A JavaScript Promise can be in several states:
// - Pending - response is not ready yet. Please wait.
// - Fulfilled - response is ready. Success. Take the data.
// - Rejected - an error occurred. Handle it.
Example 2: javascript promise
var promise = new Promise(function(resolve, reject) {
// do some long running async thing…
if (/* everything turned out fine */) {
resolve("Stuff worked!");
}
else {
reject(Error("It broke"));
}
});
//usage
promise.then(
function(result) { /* handle a successful result */ },
function(error) { /* handle an error */ }
);
Example 3: .promise()
var promise = new Promise(function(resolve, reject) {
// do some long running async thing…
if (/* everything turned out fine */) {
resolve("Stuff worked!");
}
else {
reject(Error("It broke"));
}
});