Retry Patterns for Promise-Based Operations

Promises provide a convenient way to handle asynchronous operations in JavaScript. However, sometimes it is necessary to retry operations multiple times or until a specific condition is met.

1. Retrying until Promise Resolves

To continuously retry an operation until it resolves, use a delay between retries and a maximum number of retries. This can be achieved using a for loop and .catch() chaining:

for (var i = 0; i 
2. Retrying until Condition Meets
To retry an operation until a condition is met on the result, use a .then() chain to check the condition and a .catch() chain to handle failures:
for (var i = 0; i 
3. Memory-Efficient Dynamic Retry Pattern
For a dynamic retry mechanism with unlimited retries and a specified delay, use the .catch() chain approach:
var p = Promise.reject();
while (true) {
  p = p.catch(attempt).catch(rejectDelay);
  // Break out of the loop if the condition is met.
  if (conditionMet) break;
}
Note:
The .catch() chain approach for retries has limitations regarding the maximum number of attempts and memory consumption.
For complex retry scenarios, it is recommended to use recursive solutions or purpose-built retrying libraries.