Loads files from a directory and parses them as JSON

loadJSONFiles.js

const fs = require("fs")

;(async function() {
    let items = await loadJSONFiles("items/")
    console.log(items)
})()

/**
 * Loads and parses JSON files from the specified directory
 * @param  {string} dirname The name of the directory
 * @return {array}         One array per file containing the parsed JSON object
 */
async function loadJSONFiles(dirname) {
    return new Promise((resolve, reject) => {
        fs.readdir(dirname, function(err, filenames) {
            if (err) {
                onError(err)
                return
            }

            var files = []
            filenames.forEach(function(filename) {
                files.push(
                    new Promise((resolve, reject) => {
                        fs.promises
                            .readFile(dirname + filename, "utf-8")
                            .then(json => {
                                resolve(JSON.parse(json))
                            })
                    })
                )
            })
            resolve(Promise.all(files))
        })
    })
}