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A. Promesas originales

Promise.resolve("Hola").

then(s => console.log(

"Éxito 1:", s)).

catch(e => console.log(

"Fallo 1:", e.message))

Promise.reject(new Error("ouch")).

then(s => console.log(

"Éxito 2:", s)).

catch(e => console.log(

"Fallo 2:", e.message))

Salida

Éxito 1: Hola
Fallo 2: ouch