updatable-log

pretty logger with the ability to update lines in place

Example

1const log = require('updatable-log');
2const chalk = require('chalk');
3const delay = require('delay');
4
5async function exampleApp({ quiet }) {
6  // ignore everything except log.important() and log.error()
7  log.quiet = quiet;
8
9  log.info(chalk.green('E X A M P L E - A P P'));
10  log.info('v1.2.0');
11
12  for (let page = 0; page < 40; page++) {
13    await fetchData(page);
14  }
15
16  log.clear();
17  console.log('call log.clear() before printing with the built-in console.log()');
18
19  try {
20    printResult();
21  } catch (e) {
22    log.error(e);
23  }
24}
25
26async function fetchData(page) {
27  log.update('fetching data from:', `http://get-data.com?page=${page}`);
28  await delay(100);
29
30  if (page === 10) {
31    log.warn('invalid data, skipping page', page);
32  }
33}
34
35function printResult() {
36  log.important(
37    JSON.stringify(
38      {
39        age: 6,
40        name: 'Ender Wiggin',
41      },
42      null,
43      2
44    )
45  );
46
47  this.will.throw.a.null.pointer.exception();
48}
49

To run this example yourself:

git clone https://github.com/noahsug/updatable-log.git
cd updatable-log
npm i
npm run example