Chaining Javascript promises

Question

I\'m trying to understand Promises from the MDN documentation. The first example demonstrates the then and catch methods:

// We def         


        

Answer 1

This:

var p2 = p1.then()
p2.catch()

is the same as this:

p1.then().catch()

You can also do this:

p1
 .then(response => response.body)
 .then(body => JSON.parse(body))
 .then(data => console.log(data))
 .catch(e => console.log('something somewhere failed'))