Used for the presentation of Node.js debugging features

debugging.js

const util = require('util');
const assert = require('assert');

let complexObject = {complex: {object: {that: {is: ['really', 'deeply', {nested: ':('}]}}}};

debugger;

assert(complexObject !== null)

try{
  assert(complexObject === 1)
}
catch (error){
  console.log(error)
}

console.log('stringify', JSON.stringify(complexObject, null, 2))
let showHidden = true;
let depth = 2;
console.log('inspect - depth 2', util.inspect(complexObject, showHidden, depth))
console.log('inspect - depth infinite', util.inspect(complexObject, {
  showHidden: true,
  depth     : null
}))


/*
 Custom inspect function
 */
class Box {
  constructor(value) {
    this.value = value;
  }

  inspect(depth, options) {
    if (depth < 0) {
      return options.stylize('[Box]', 'special');
    }

    const newOptions = Object.assign({}, options, {
      depth: options.depth === null ? null : options.depth - 1
    });

    // Five space padding because that's the size of "Box< ".
    const padding = ' '.repeat(5);
    const inner = util.inspect(this.value, newOptions).replace(/\n/g, '\n' + padding);
    return options.stylize('Box', 'special') + '< ' + inner + ' >';
  }
}


const box = new Box(true);

console.log('Box object', util.inspect(box));