p-locate is a popular npm package that is designed to return the first fulfilled promise that meets certain specified conditions, in effect making it similar to an asynchronous version of the Array#find utility in JavaScript. It provides a powerful utility for managing JavaScript promises, especially in scenarios where you need to parse through a series of promises and return the first one that satisfies a given testing function.

How do you use p-locate?

Using p-locate in your JavaScript project involves first installing the package via npm with the command npm install p-locate. Once installed, you can use it by importing it into your project and calling the pLocate function with an array of values or promises and a tester function. The tester function returns a Boolean value indicating whether a given element satisfies certain conditions.

Here is a simple usage example:

import {pathExists} from 'path-exists';
import pLocate from 'p-locate';

const files = [
	'unicorn.png',
	'rainbow.png', // Only this one actually exists on disk
	'pony.png'
];

const foundPath = await pLocate(files, file => pathExists(file));

console.log(foundPath);
//=> 'rainbow'

In this example, the pLocate function is used to find the first file in the files array that exists on the disk.

Where are the p-locate docs?

The official p-locate documentation can be found on its GitHub page at git+https://github.com/sindresorhus/p-locate.git. The readme file on this page provides detailed descriptions of how to install and use the package, as well as its API which outlines all the functions and options that p-locate offers. This is a great resource for developers who want to understand how to use p-locate effectively in their projects to manage JavaScript promises.