inflight 1.0.6

Inflight is a popular JavaScript package in the npm registry. Its core function is to add callbacks to requests that are currently in flight to prevent asynchronous duplication. This means that if multiple asynchronous requests are made using the same key, Inflight ensures that only one request actually gets executed and the resulting value is shared among all the requests. This helps to prevent unnecessary requests and enhances the performance of your JavaScript code.

To utilize the Inflight package, you first need to install it with npm in your project. Once that is done, you can require it in your JavaScript file. Below is an example of how you can use Inflight in a function that makes some request, utilizing a key and a callback function:

In JavaScript:

var inflight = require('inflight'); // Require the package

// Function that uses inflight
function req(key, callback) {
  callback = inflight(key, callback);

  if (!callback) return;

  setTimeout(function() {
    callback(null, key);
  }, 100);
}

// Call function with requests
req('foo', cb1);
req('foo', cb2);
req('foo', cb3);
req('foo', cb4);

In the above code, only a single setTimeout assignment is made. When the timer expires, all callback functions get called.

For more detailed information about Inflight, you can refer to the official documentation available in the readme.md file on the project’s GitHub page, accessible at git+https://github.com/npm/inflight.git. This documentation provides an in-depth overview of the package, including its usage and more concrete examples to guide users. For any JavaScript developer keen on preventing asynchronous duplication in their requests, Inflight represents an excellent solution.