How do I save the data I get from a fetch request in JavaScript into a variable that is external to my function

user_13524157 0
Viewed 430

Obvsiouly I'm very new to Javascript. For an app that I'm building, I need to save the data I get from a fetch request into a variable that ideally I can access outside of my function. Any light on this would be hugely appreciated.

Here's my code:

function generateNewQuote() {
    fetch('https://api.whatdoestrumpthink.com/api/v1/quotes/random')
           .then(response => response.json())
           .then(data => {
            const newMes = data.message;
            console.log(newMes );
        });
}

I need to get the value of my newMes variable into a variable that I can specify in the global scope or alternative a way to access the newMes variable locate inside my generateNewQuote function in the Global Scope.

fetch-api javascript
2 Answers

Change the variable Scope.

let newMes = [];
function generateNewQuote() {
    newMes = [];
    fetch('https://api.whatdoestrumpthink.com/api/v1/quotes/random')
           .then(response => response.json())
           .then(data => {
            newMes = data;
            console.log(newMes.message );
        });
}
user_105038170

This may not be the most right answer, but this works. As setTimeout also works somewhat like await outside an async function.

var newMes;
function generateNewQuote() {
fetch('https://api.whatdoestrumpthink.com/api/v1/quotes/random')
       .then(response => response.json())
       .then(data => {
        newMes = data.message;
        // console.log(newMes);
    });
}
generateNewQuote();
setTimeout(function() {console.log(newMes)}, 2000)

The code above basically waits for a while before putting newMes into the console. Because the problem of newMes being undefined is that the script is still fetching data from the server and thus requires a bit of time.

The problem of this is that 2000 milliseconds may not be enough to load the data and thus console.log(newMes) will return undefined.

user_129435370
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