PromiseQueue

PromiseQueue is a JavaScript library designed to manage asynchronous operations that need to be executed in a sequential order. It provides a mechanism to queue promises, ensuring that each promise is resolved or rejected before the next one in the queue begins its execution. This is particularly useful when dealing with scenarios such as making a series of API calls where the order of operations matters, or when performing batch updates that require serial processing to avoid race conditions or maintain data integrity.

The core functionality of PromiseQueue revolves around adding tasks (which are typically functions returning promises) to a queue. When a task is added, it waits for the previous task to complete. Once the previous task is finished, the current task is executed. The library then monitors the promise returned by the executed task. Upon its resolution or rejection, the queue proceeds to the next task. This sequential execution guarantees that operations happen one after another, preventing concurrent execution that could lead to unexpected behavior.

PromiseQueue offers features such as controlling the concurrency of operations (though its primary focus is sequential), error handling, and the ability to clear the queue. It can be integrated into various JavaScript environments, including browser-based applications and Node.js. By abstracting the complexity of promise chaining and serial execution, PromiseQueue simplifies the development of applications that rely heavily on asynchronous workflows, making code more readable and manageable.