A json compare tool

jsonct.js

const getNode = (obj, path) => {
    return path.split('.').reduce((o, k) => {
        return o && o[k];
    }, obj);
}
const fs = require("fs");
var ProgressBar = require('./ProgressBar');

const lang1 = 'en';
const lang2 = 'zh-cht'

const data1 = JSON.parse(fs.readFileSync(`${lang1}.json`));
const data2 = JSON.parse(fs.readFileSync(`${lang2}.json`));

console.log(`data loaded`);

let pb = new ProgressBar();

let differents = [];
let counter = 0, diffs = 0;;
console.log("diffs | count | path");

function fun(obj, path = []) {
    const base_path = path.join('.');
    pb.render(diffs, counter++, base_path);

    // if (Object.keys(obj).length === 0) {
    //     console.log("Edge node,this should not happen!");
    //     return;
    // }

    for (let key in obj) {
        //if is edge node
        if (typeof (obj[key]) != 'string' && Object.keys(obj[key]).length != 0) {
            fun(obj[key], path.concat([key]));
        }

        //start compare between two lang
        let jsonPath = `${base_path}.${key}`;

        const e1 = String(getNode(data1, jsonPath)).trim();
        const e2 = String(getNode(data2, jsonPath)).trim();

        if (e1 !== e2) {
            // console.log(`e1:${e1}\ne2:${e2}\n`);
            pb.render(diffs++, counter, base_path)
            differents.push({ path:jsonPath,a: e1, b: e2 });
        }
    }
}

fun(data1);
const output = JSON.stringify(differents, null, 2);
fs.writeFile('output.json', output, () => { console.log('output write.') });

ProgressBar.js

var slog = require('single-line-log').stdout;

function ProgressBar(description) {
    this.render = function (diffs, count, path) {
        slog(`${diffs} | ${count} | ${path}`);
    };
}

module.exports = ProgressBar;