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'use strict';

console.log('"toPrimitive" in Symbol', 'toPrimitive' in Symbol);

const person = { name: 'Gena', age: 19 };

person[Symbol.toPrimitive] = function (hint) {

console.log('hint', hint);

const primitives = {

number: () => this.age,

string: () => this.name,

default: () => JSON.stringify(person),

};

return primitives[hint]();

};

Object.defineProperty(person, Symbol.toPrimitive, {

enumerable: false,

configurable: false,

});

// Usage:

console.log(+person);

console.log(`${person}`);

console.log(person + '');