CODEWITHSUNDEEP
javascriptarrayspromiseasync-awaitfetch
elabugaa
elabugaa

Reputation: 9

How can i fetch urls sequentially?

I have array that contain urls. Firstly I need to fetch first and second urls simultaneously and when one of this will be resolved, i will fetch next url. Repeat while all urls wont be fetched. How can i do this ?

Upvotes: -1

Views: 1255

Answers (1)

jfriend00
jfriend00

Reputation: 707308

You don't show any code, so I'll have to provide a generic example. fetch() returns a promise. If you want to run a loop sequentially waiting for the promise of each fetch() operation, then the simplest way to do that is with async and await:

async function someFunc(array) {
    for (let item of array) {
        let result = await fetch(/* pass arguments here using item */);
        // process result here
    }
    return someValue;    // this becomes the resolved value of the promise
                         // the async function returns
}

// usage
// all async functions return a promise
// use .then() on the promise to get the resolved value
someFunc(someArray).then(results => {
    console.log(results);
}).catch(err => {
    console.log(err);
});

Upvotes: 2

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