format

format.js

'use strict';

const {
  format
} = require('util');

const strFormat = format('%s:%s', 'foo');//%s -> string
console.log('strFormat', strFormat);

const numberFormat = format('%d:%d', 5.2);
console.log('numberFormat', numberFormat);

const intFormat = format('%i:%i', 5);
console.log('intFormat', intFormat);

const jsonFormat = format('%j:%j', {key: true});
console.log('jsonFormat', jsonFormat);