Little cli tasks tool as outlined in https://youtu.be/d8P7NIqQelE

index.js

const inquirer = require('inquirer');
const fs = require('fs');

const jsonPath = __dirname + '/tasks.json';
let tasks = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));

function run() {
    inquirer.prompt([
        {
            name: 'action',
            type: 'list',
            message: 'What do you want to do?',
            choices: ['show tasks', 'add task', 'remove task' , 'mark as completed']
        },
        {
            name: 'new',
            type: 'input',
            message: 'What is your new task?',
            when: (answers) => {
                return answers.action === 'add task'
            }
        },
        {
            name: 'dedicated',
            type: 'list',
            message: 'Which task?',
            when: (answers) => {
                return answers.action === 'remove task' || answers.action === 'mark as completed'
            },
            choices: function () {
                let i, ids = [];
                for (i = 0; i < tasks.length; i++) {
                    ids.push(i);
                }
                return ids;
            }
        }
    ]).then(answers => {
        switch (answers.action) {
            case 'show tasks':
                console.table(tasks);
                break;
            case 'remove task':
                tasks.splice(answers.dedicated,1);
                break;
            case 'add task':
                tasks.push({
                    title: answers.new,
                    done: false
                });
                break;
            case 'mark as completed':
                tasks[answers.dedicated].done = true;
                break;

        }
        writeToFile();
        run();

    });
}
function writeToFile(){
    fs.writeFileSync(jsonPath, JSON.stringify(tasks));
}


run();

package.json

{
  "name": "cli-tasks",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "dependencies": {
    "inquirer": "^7.1.0"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node index"
  },
  "author": "neoan",
  "license": "ISC"
}

tasks.json

[]