I have a Laravel application that uses Inertia and React as the front end. Recently I was getting a CORS error. Basically I was trying to use Shopify’s API to connect a user’s store and retrieve their products by using a Sales channel app I created. When I try to use axios.post from React to front end and then post to Shopify from there to receive access tokens and such I was always getting a CORS blocked because No access control header. This happened from the Shopify end as well when I tried to post from Shopify to my Laravel app using fetch.

I am trying to download PDF from react app using fetchAPI as following :

I want to use a Real Time Prices API at https://api.idexonline.com/RealTimePrices/Calculator

And here is my function to fetch the API:

I’m working on a JavaScript project where I need to delay a fetch request. However, due to some project constraints, I can’t use setTimeout or setInterval. I’m aware that these are the usual methods for delaying execution in JavaScript, but I need an alternative approach.