Pass parameters to GET request in fetch API

Use a query string

If you like the idea of a params object, then you can construct the URL using a URLSearchParams object:

let url = new URL('https://sl.se')
url.search = new URLSearchParams({
    lat:35.696233,
    long:139.570431
})

fetch(url)

I'll try this

I was actually looking for a way to convert Object to query string parameters.

looks like it works properly.