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Full Stack Development with Spring Boot 3 and React
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The traditional way to handle an asynchronous operation is to use callback functions for the success or failure of the operation. If the operation succeeds, the success
function is called; otherwise, the failure
function is called. The following (abstract) example shows the idea of using a callback function:
function doAsyncCall(success, failure) {
// Do some API call
if (SUCCEED)
success(resp);
else
failure(err);
}
success(response) {
// Do something with response
}
failure(error) {
// Handle error
}
doAsyncCall(success, failure);
Nowadays, promises are a fundamental part of asynchronous programming in JavaScript. A promise is an object that represents the result of an asynchronous operation. The use of promises simplifies the code when you’re executing asynchronous calls. Promises are non-blocking. If you are using an older library for asynchronous operations that doesn’t support promises, the code becomes much more difficult...