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const fetch = require("node-fetch"); | |
// Una Promesa es un objeto en Javascript que vincula codigo | |
// que produce un resultado (y puede demorar) | |
// con codigo que quiere consumir el resultado | |
// ejemplo de pidiendo comida | |
// '🍔' '🍟' '🍪' | |
// * fetch | |
// * Promise then catch | |
// * new Promise (setTimeout, callbacks) | |
// * Promise all | |
fetch('https://api.discogs.com/releases/249504').then((response) => { | |
console.log(`Response status ${response.status}`); | |
// return response.json(); //este va a volver nuevo promise, podemos agregar otro then cuando el callback anterior vuelva un promise | |
}).catch((err) => { | |
console.log(`Un error occured ${err}`) | |
}); | |
const pidoHamburguesas = (cantidad) => { | |
return new Promise((resolve, reject) => { | |
const limite = 10; | |
if (cantidad > limite) { | |
reject("Menos por favor"); | |
} else { | |
setTimeout(() => { | |
const arrHamb = []; | |
for (let i = 0; i < cantidad; i++) { | |
arrHamb.push('🍔'); | |
} | |
resolve(arrHamb); | |
return arrHamb; | |
}, 1000 * cantidad); | |
} | |
}) | |
} | |
pidoHamburguesas(11).then((miPedido) => { | |
console.log("listo", miPedido) | |
}).catch((mensajeError) => { | |
console.log(mensajeError); | |
}).finally(() => console.log("Ya terminado!")); | |
const f1 = () => fetch('https://api.discogs.com/releases/249504'); | |
const f2 = () => fetch('https://api.discogs.com/artists/1/releases'); | |
const f3 = () => fetch('https://api.discogs.com/artists/100/releases'); | |
Promise.all([ f1(), f2(), f3()]).then((allResp) => { | |
console.log(allResp); | |
}); | |
//'https://api.discogs.com/releases/249504' | |
// https://api.discogs.com/artists/1/releases | |
// https://api.discogs.com/artists/100/releases | |
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