'use strict';

const timers = require('node:timers/promises');

const length = async (line) => {

await timers.setTimeout(100);

if (line.trim() === '') throw new Error('Just spaces');

return line.length;

};

const checkType = async (line) => {

await timers.setTimeout(100);

if (line === undefined) throw new Error('Argument is undefined');

if (typeof line !== 'string') throw new Error('Argument is not a string');

if (line === '') throw new Error('Argument is empty string');

};

const getLength = async (line) => {

await timers.setTimeout(100);

await checkType(line);

return await length(line);

};

const main = async () => {

const line = 'Hello World!';

const length = await getLength(line);

console.log({ line, length });

};

main();