assured

1.0.15 • Public • Published

assured

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Combine promises and callbacks together.

☁️ Installation

# Using npm 
npm install --save assured
 
# Using yarn 
yarn add assured

📋 Example

const assured = require("assured");
 
let foo = (age, cb) => {
 
    // Swap the callback function
    if (typeof age === "function") {
        cb = age;
    }
 
    // Proxy the callback function
    cb = assured(cb);
 
    // Validate the age
    if (typeof age !== "number") {
        cb(new Error("Invalid age."));
    } else {
        // Do something async
        setTimeout(() => {
            cb(null, `The provided age is ${age}`);
        }, 100);
    }
 
    // Return the promise
    return cb._;
}
 
// Callback interface + error
foo(err => console.log(err));
// => [Error: Invalid age.]
 
// Callback interface + success
foo(42, (err, data) => console.log(err, data));
// => null 'The provided age is 42'
 
// Promise interface + error
foo().then(x => {
    console.log("Success: ", x);
}).catch(e => {
    console.log("Error: ", e);
    // => Error:  [Error: Invalid age.]
});
 
// Promise + Success
foo(42).then(x => {
    console.log("Success: ", x);
}).catch(e => {
    console.log("Error: ", e);
});
 
 
// Async - Await
(async () => {
    const res = await foo(32)
    console.log(res);
})()

❓ Get Help

There are few ways to get help:

  1. Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.
  2. For bug reports and feature requests, open issues. 🐛
  3. For direct and quick help, you can use Codementor. 🚀

📝 Documentation

assured(fn, p)

Proxies the callback function.

Params

  • Function fn: The callback function to proxy.
  • Promise p: A custom promise constructor (default: the built-in Promise).

Return

  • Function The proxied callback function extended with:
  • resolver (Function): The promise resolver.
  • assuredResolve (Function): The resolve method.
  • assuredReject (Function): The reject method.
  • _ (Promise): The promise object (used to return from your function).

😋 How to contribute

Have an idea? Found a bug? See how to contribute.

💖 Support my projects

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Thanks! ❤️

💫 Where is this library used?

If you are using this library in one of your projects, add it in this list. ✨

  • scrape-it
  • tinyreq
  • fn-result
  • fs-file-tree
  • bloggify-plugin-loader
  • bloggify-plugin-class
  • scrape-it-plus
  • @slikts/scrape-it
  • csv-it

📜 License

MIT © Ionică Bizău

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