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Discussion on: Notes on ECMAScript 6 (ES6)

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Replies for: I've not actually tried using them yet, but my comment mostly comes from looking at that chain, imagining a longer one, and then imagining trying t...

 
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Scott Hardy •

I recommend trying promises out, start by working with promises before creating them. A promise that you could work with is the fetch api for example, google has a good introduction

const getJson = res => {
    // comment out the if to return the error 
    // and see how catch works
    if(res.status !== 200) {
        return new Error(`StatusCode: ${res.status}`)
    }
    return res.json()
}
const getUrl = url => fetch(url).then(getJson)

getUrl('https://baconipsum.com/api/?type=meat-and-filler')
    .then(res => console.log(res))
    .catch(err => console.error(err.message))