assured

Combine promises and callbacks together.

:cloud: Installation

# Using npm
npm install --save assured

# Using yarn
yarn add assured

:clipboard: 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);
})()

:question: 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. :bug:
3. For direct and quick help, you can use Codementor. :rocket:

:memo: 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).

:yum: How to contribute

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

:sparkling_heart: Support my projects

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Thanks! :heart:

:dizzy: Where is this library used?

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

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

:scroll: License

MIT © Ionică Bizău