How to update progress bar in place?

[stefek99]

There is an existing example that updates progress bar in place: https://github.com/nathanpeck/clui/blob/master/examples/progress.js (60 lines in total)

There is much simpler example directly in the readme: https://github.com/nathanpeck/clui/blob/master/README.md (4 lines only)

var clui = require('clui');

var Progress = clui.Progress;

var thisProgressBar = new Progress(20);
console.log(thisProgressBar.update(10, 30));

So I've added setInterval so that it updates the progress. I've also added line to clear the console and new console.log with each interval:

var clui = require('clui');

var Progress = clui.Progress;

var value = 50;

var thisProgressBar = new Progress(20);

console.log(thisProgressBar.update(value, 100));

var intervalId = setInterval(function() {
    value++;
    // console.log("Updated value: " + value);

    process.stdout.write('\033c'); // clearing the console
    console.log(thisProgressBar.update(value, 100));

    if (value === 100) {
        clearInterval(intervalId);
    }
}, 500)

In the example with countdown spinner I don't have clear the console and do console.log, see example: https://github.com/nathanpeck/clui/blob/master/README.md#spinnerstatustext

Ideally I would like to do just thisProgressBar.update(value, 100) and the progress bar should be updated in places easily...

(without clearing the existing console - I may have so many other progress bars and elements running)

[Jack89ita]

Same problem here. I would like to update the bar instead of create a new line with another one.

[cmcnamara87]

i had the same problem, so i ended up doing this

process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write(thisPercentBar.update(percent));

it works, not sure if its the best way to do it though

[itsgoofer]

Any ideas on this?

[marquettec]

Feature would be really needed ;)

[ourarash]

I wrote log-with-statusbar package for a similar problem. The following should get what you want:

    var clui = require("clui");
    var log = require("log-with-statusbar")();

    var Progress = clui.Progress;
    var value = 50;

    var thisProgressBar = new Progress(20);
    // console.log(thisProgressBar.update(value, 100));
    log.setStatusBarText([thisProgressBar.update(value, 100)]);

    var intervalId = setInterval(function() {
      value++;
      // console.log("Updated value: " + value);
      log("Updated value: " + value);

      // process.stdout.write('\033c'); // clearing the console
      log.setStatusBarText([thisProgressBar.update(value, 100)]);
      // console.log(thisProgressBar.update(value, 100));
      if (value === 100) {
        clearInterval(intervalId);
      }
    }, 500);

[jeremyk]

I noticed that the default output function adds a return. So I just get the output with .contents() instead and write it myself to keep it on the same line. Here is an example you can call repeatedly and it will update in place:

function showProgress(current, total, message) {
  process.stdout.clearLine();
  process.stdout.cursorTo(0);
  const progress = new Line()
    .column('Syncing items')
    .column(Gauge(current, total, 40, total, message), 80)
    .fill()
    .contents();
  process.stdout.write(progress);
}