Multiple bars example with npm `progress`.

multiples.js

var ProgressBar = require('progress');

function Multibar(stream) {
  this.stream     = stream || process.stderr;
  this.cursor     = 0;
  this.bars       = [];
  this.terminates = 0;
}

Multibar.prototype = {
  newBar: function(schema, options) {
    options.stream = this.stream;
    var bar = new ProgressBar(schema, options);
    this.bars.push(bar);
    var index = this.bars.length - 1;

    // alloc line
    this.move(index);
    this.stream.write('\n');
    this.cursor ++;

    // replace original
    var self  = this;
    bar.otick = bar.tick;
    bar.oterminate = bar.terminate;
    bar.tick = function(value, options) {
      self.tick(index, value, options);
    }
    bar.terminate = function() {
      self.terminates++;
      if (self.terminates == self.bars.length) {
        self.terminate();
      }
    }

    return bar;
  },

  terminate: function() {
    this.move(this.bars.length);
    this.stream.clearLine();
    this.stream.cursorTo(0);
  },

  move: function(index) {
    if (!this.stream.isTTY) return;
    this.stream.moveCursor(0, index - this.cursor);
    this.cursor = index;
  },

  tick: function(index, value, options) {
    var bar = this.bars[index];
    if (bar) {
      this.move(index);
      bar.otick(value, options);
    }
  }
}

var mbars = new Multibar();
var bars  = [];

function addBar() {
  bars.push(mbars.newBar('  :title [:bar] :percent', {
      complete: '='
    , incomplete: ' '
    , width: 30
    , total: 100
  }));
  return bars[bars.length - 1];
}

function forward() {
  for (var i = 0; i < bars.length; i++) {
    bars[i].tick(1, { title: 'forward: ' });
  }
  if (bars[0].curr > 60) {
    addBar().tick(bars[0].curr);
    backward();
  } else {
    setTimeout(forward, 20);
  }
}

function backward() {
  for (var i = 0; i < bars.length; i++) {
    bars[i].tick(-1, { title: 'backward: ' });
  }
  if (bars[0].curr == 0) {
    mbars.terminate();
    console.log("End all");
  } else {
    setTimeout(backward, 20);
  }
}

for(var i = 0; i < 5; i++) {
  addBar();
}

forward();

multi-progress is now a package on npm

Yay!

multi-progress is now a package on npm

Yay!

The links of the multi-progress are as follows:

• GitHub repo: https://github.com/pitaj/multi-progress
• npm: https://www.npmjs.com/package/multi-progress

@pitaj I wonder if you'd consider updating multi-progress. It has a dependency on an older version of progress which has a bug. Thanks.