omarkdev

const result = new Boolean('awesome');

result.origin = 'https://omark.dev';

console.log(result);
console.log(result == true);
console.log(result === true);

// { [Boolean: true] origin: 'https://omark.dev' }
// true

omarkdev

const falseExample = false;
const undefinedExample = undefined;
const nullExample = null;
const NaNExample = NaN;
const zeroExample = 0;
const stringExample = "";

console.log(!! falseExample, Boolean(falseExample), new Boolean(falseExample));
console.log(!! undefinedExample, Boolean(undefinedExample), new Boolean(undefinedExample));
console.log(!! nullExample, Boolean(nullExample), new Boolean(nullExample));

omarkdev

const numberExample = -1;
const stringExample = 'Awesome';

console.log(!! numberExample, !! stringExample);
console.log(Boolean(numberExample), Boolean(stringExample));
console.log(new Boolean(numberExample), new Boolean(stringExample));

// true true
// true true
// [Boolean: true] [Boolean: true]

omarkdev

const firstWay = !! 'secret';
const secondWay = Boolean('secret');
const thirdWay = new Boolean('secret');

console.log(firstWay === true);
console.log(secondWay === true);
console.log(thirdWay === true);

// true
// true

omarkdev

const firstWay = !! 'secret';
const secondWay = Boolean('secret');
const thirdWay = new Boolean('secret');

console.log(typeof firstWay);
console.log(typeof secondWay);
console.log(typeof thirdWay);

// boolean
// boolean

omarkdev

const firstWay = !! 'works';
const secondWay = Boolean('works');
const thirdWay = new Boolean('works');

if (firstWay == true) {
    console.log('First way really works!');
}

if (secondWay == true) {
    console.log('Second way really works!');

omarkdev

function showInfo() {
    return (
        target: any,
        propertyKey: string,
        parameterIndex: number,
    ) => {
        console.log('target', target);
        console.log('property key', propertyKey);
        console.log('parameter index', parameterIndex);
    }

omarkdev

function enumerable(newValue: boolean) {
    return (
        target: any,
        propertyKey: string,
        propertyDescriptor: PropertyDescriptor,
    ) => {
        propertyDescriptor.enumerable = newValue;
    }
}
class User {

omarkdev

function enumerable(newValue: boolean) {
    return (
        target: any,
        propertyKey: string,
        propertyDescriptor: PropertyDescriptor,
    ) => {
        propertyDescriptor.enumerable = newValue;
    }
}
class User {

omarkdev

function enumerable(newValue: boolean) {
    return (
        target: any,
        propertyKey: string,
        propertyDescriptor: PropertyDescriptor,
    ) => {
        propertyDescriptor.enumerable = newValue;
    }
}