First of all, Promise.try
is still in experimental mode. You can check its compatibility on caniuse.com. This method can be helpful in various cases. Letβs look at the most useful ones:
1. Handle Both Synchronous and Asynchronous Operations
Promise.try
allows you to write mostly the same code for both synchronous and asynchronous operations.
const result = Promise.try(() => {
if (someCondition) {
return syncFunction();
} else {
return asyncFunction();
}
}).then(result => {
console.log('Result:', result);
}).catch(err => {
console.error('Error:', err);
});
2. Handle Errors in Synchronous Code
Wrapping synchronous code in Promise.try
gives you the option to handle errors in your synchronous code as if it were asynchronous.
const result = Promise.try(() => {
// synchronous code that might throw an error
return someFunction();
}).catch(err => {
console.error('Error:', err);
});
3. Reduce Nested try-catch
Blocks
Promise.try
can make your code more readable and understandable by other developers by eliminating the need for nested try-catch blocks.
Promise.try(() => {
// some code
return someOtherFunction();
}).then(result => {
// handle result
}).catch(err => {
// handle error
});
4. Avoid Unnecessary Promises
Using Promise.try
instead of always creating a promise with Promise.resolve can improve readability and slightly improve performance.
// Instead of wrapping everything in Promise.resolve, which always creates a promise:
const promise = Promise.resolve().then(() => syncFunction());
// Use Promise.try to only create a promise if necessary:
const promise = Promise.try(syncFunction);
5. Simplify Complex Flows
By using Promise.try
, you can improve the understanding of both synchronous and asynchronous logic by creating a simpler structure.
function processInput(input) {
return Promise.try(() => {
if (typeof input === 'string') {
return syncFunction(input);
} else if (typeof input === 'number') {
return asyncFunction(input);
} else {
throw new Error('Invalid input type');
}
});
}
Bonus: Functional Programming Paradigm
Promise.try
aligns well with the functional programming paradigm since it receives an argument as a function.
const performTask = (task) => {
return Promise.try(task).then(result => {
console.log('Task result:', result);
}).catch(err => {
console.error('Task error:', err);
});
};
performTask(syncTask);
performTask(asyncTask);
Conclusion
Promise.try()
offers a unique approach to handling both synchronous and asynchronous code seamlessly. It's worth trying on your pet projects to see how it can enhance your programming practices, but remember that it's still in the experimental stage.
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