blessed

dev.js

const blessed = require('blessed');
const {execFile} = require('child_process');

const screen = blessed.screen({
    smartCSR: true
});

screen.title = 'my window title';

var box = blessed.box({
    label: 'Left',
    top: '0',
    left: '0',
    width: '50%',
    height: '100%',
    content: 'Hello {bold}world{/bold}!',
    tags: true,
    scrollable: true,
    border: {
        type: 'line'
    },
    style: {
        border: {
            fg: '#f0f0f0'
        }
    }
});

screen.append(box);

const logs = execFile('pm2', ['logs'], {
    env: Object.assign({DEBUG_COLORS: true}, process.env)
});
logs.stdout.on('data', (data) => {
    box.setContent(box.content + data);
    screen.render();
});
logs.stderr.on('data', (data) => {
    box.setContent(box.content + data);
    screen.render();
});


var box2 = blessed.log({
    label: 'Right',
    top: '0',
    left: '50%',
    width: '50%',
    height: '100%',
    content: 'Hello {bold}world{/bold}!',
    tags: true,
    scrollable: true,
    border: {
        type: 'line'
    },
    style: {
        border: {
            fg: '#f0f0f0'
        }
    }
});

screen.append(box2);

const logs2 = execFile('top', [], {
    env: Object.assign({DEBUG_COLORS: true}, process.env)
});
logs2.stdout.on('data', (data) => {
    box2.setContent(box2.content + data);
    screen.render();
});
logs2.stderr.on('data', (data) => {
    box2.setContent(box2.content + data);
    screen.render();
});

screen.key(['escape', 'q', 'C-c'], function (ch, key) {
    return process.exit(0);
});

box.focus();

screen.render();