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¿Cómo agregar a un conjunto sin mutarlo?

Quiero agregar un elemento a un Set sin mutar el conjunto original. Intenté usar add() pero esto muta el original:

 var s = new Set(); var s1 = s.add('foo'); console.log('s has foo:', s.has('foo')); console.log('s1 has foo:', s1.has('foo'));

¿Cómo puedo crear un nuevo conjunto agregándole un elemento, sin mutar el conjunto original?

about 4 years ago · Juan Pablo Isaza
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Puede crear un nuevo conjunto a partir del original y luego agregar el elemento al nuevo conjunto:

 var s = new Set(); var s1 = new Set(s); s1.add('foo'); console.log('s has foo:', s.has('foo')); console.log('s1 has foo:', s1.has('foo'));

about 4 years ago · Juan Pablo Isaza Report
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