I'm working on a complex JavaScript application with multiple API calls that need to happen in sequence and parallel. My promise chains are getting out of control and debugging them is becoming impossible. Here's a simplified version of what I'm dealing with:
```javascript
async function processOrder(orderId) {
try {
const order = await getOrder(orderId);
const user = await getUser(order.userId);
const inventory = await checkInventory(order.items);
const payments = await Promise.all(
order.items.map(item => processPayment(item))
);
const shipments = await Promise.all(
order.items.map(item => createShipment(item))
);
return await updateOrderStatus(orderId, 'completed');
} catch (error) {
console.error('Order processing failed:', error);
throw error;
}
}
```
The problems I'm facing:
1. When something fails, it's hard to tell which step failed
2. The error messages aren't very helpful
3. I need better logging throughout the chain
4. Some operations should continue even if others fail
I'm looking for advanced debugging tips and solutions for complex async JavaScript code. Specifically:
1. What are the best practices for error handling in promise chains?
2. How can I add better logging to track progress through complex operations?
3. Are there patterns for implementing retry logic for specific steps?
4. What tools or libraries help with debugging async JavaScript?
This feels like one of those JavaScript help forum questions that experienced developers have solved many times. I'd appreciate any web development support or code review and feedback on my approach.
Also, if anyone has recommendations for coding tutorial recommendations that cover advanced async patterns, I'd love to check them out!
```javascript
async function processOrder(orderId) {
try {
const order = await getOrder(orderId);
const user = await getUser(order.userId);
const inventory = await checkInventory(order.items);
const payments = await Promise.all(
order.items.map(item => processPayment(item))
);
const shipments = await Promise.all(
order.items.map(item => createShipment(item))
);
return await updateOrderStatus(orderId, 'completed');
} catch (error) {
console.error('Order processing failed:', error);
throw error;
}
}
```
The problems I'm facing:
1. When something fails, it's hard to tell which step failed
2. The error messages aren't very helpful
3. I need better logging throughout the chain
4. Some operations should continue even if others fail
I'm looking for advanced debugging tips and solutions for complex async JavaScript code. Specifically:
1. What are the best practices for error handling in promise chains?
2. How can I add better logging to track progress through complex operations?
3. Are there patterns for implementing retry logic for specific steps?
4. What tools or libraries help with debugging async JavaScript?
This feels like one of those JavaScript help forum questions that experienced developers have solved many times. I'd appreciate any web development support or code review and feedback on my approach.
Also, if anyone has recommendations for coding tutorial recommendations that cover advanced async patterns, I'd love to check them out!
