Examples

Chart

const barChart = require('bar-charts');

console.log(barChart([
  {label: 'smiles per day', count: 143},
  {label: 'laughs', count: 340},
  {label: 'high fives', count: 26}
]));

output

smiles per day | ███████████████████                            | 143
        laughs | ██████████████████████████████████████████████ | 340
    high fives | ████                                           | 26

Progress bar

const barChart = require('bar-charts');
const sequentialPromiseAll = require('sequential-promise-all');
const timeout = ms => new Promise(res => setTimeout(() => res(ms), ms));

(async () => {
  const arr = Array.from(Array(100), (d, i) => i); // fill array with n values 0..100
  await sequentialPromiseAll(timeout, [10], arr.length, (_args, _previousResponse, i) => {
    process.stdout.clearLine();
    process.stdout.cursorTo(0);
    const count = (i + 1) / arr.length * 100;
    const output = barChart([{label: `${i + 1}/${arr.length}`, count}], {percentages: true});
    process.stdout.write(output); // end the line
  });
})();

output

 84/100 | ████████████████████████████████████████████         |  84%

Credits

jstrace-bars
printf