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thenify-all

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thenify-all

Promisifies all the selected functions in an object

  • 1.6.0
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What is thenify-all?

The thenify-all npm package is used to promisify entire modules or specific sets of functions. This means it can convert callback-based functions or methods to return promises instead, allowing for more modern, cleaner asynchronous code using promises or async/await syntax.

What are thenify-all's main functionalities?

Promisifying an entire module

This code sample demonstrates how to promisify all methods of the Node.js 'fs' module. After promisifying, methods like 'readFile' return a promise that can be used with '.then()' and '.catch()' for handling asynchronous operations.

const thenifyAll = require('thenify-all');
const fs = thenifyAll(require('fs'));

fs.readFile('file.txt', 'utf8').then(contents => {
  console.log(contents);
}).catch(error => {
  console.log(error);
});

Promisifying selected functions

This code sample shows how to promisify only selected functions from the 'fs' module. In this case, only 'readFile' and 'writeFile' are promisified, and they can be used with promise syntax.

const thenifyAll = require('thenify-all');
const fs = require('fs');
const promisifiedFs = thenifyAll(fs, {}, ['readFile', 'writeFile']);

promisifiedFs.readFile('file.txt', 'utf8').then(contents => {
  console.log(contents);
}).catch(error => {
  console.log(error);
});

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Package last updated on 10 Jan 2015

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