Also known as "well-known symbols". https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol#well-known_symbols https://develope

Also known as "well-known symbols". https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol#well-known_symbols https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...