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'use strict';

console.clear();

console.log('log');

const obj = {

city: 'Roma',

born: 121,

children: [

{

city: 'Sirmium',

born: 170,

{

city: 'Roma',

born: 160,

};

Object.defineProperty(obj, 'childCount', {

enumerable: false,

writable: false,

value: 13,

});

console.log({ obj });

console.dir({ obj });

console.dir({ obj }, { showHidden: true, depth: 20, colors: true });

console.error('Error');

console.time('Loop time');

const arr = [];

for (let i = 0; i < 10000; i++) {

arr.push(i);

}

console.timeEnd('Loop time');

console.trace('Trace here');

console.log(`\n${Object.keys(console).join(', ')}`);