React + fetch: adding extra characters and backslashes to my url - reactjs

Question

I have this code in React 17
useEffect(() => {
getLocalJson('../json/login/login.json', props.headers)
.then(resp => {
setFields(resp);
});
}, [props.headers]);
And the getLocalJson method is in a different file:
export const getLocalJson = async (url, headers) => {
console.log(url)
const resp = await fetch(url, {'headers': headers});
const json = await resp.json();
return json;
}
However the call to load the local JSON file from the public folder is:
Request URL: http://localhost:3000/json/login/%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5C%5Cdx%5Cjson%5Clogin%5Clogin.json
Ths is the JSON
[
{
"order": 0,
"systemName": "title",
"friendlyName": "Login",
"dataType": {
"type": "TITLE"
}
},
{
"order": 1,
"required": true,
"systemName": "username",
"friendlyName": "Username",
"errorMsg": "Invalid username",
"dataType": {
"type": "TEXT"
}
},
{
"order": 2,
"required": true,
"systemName": "password",
"friendlyName": "Password",
"errorMsg": "Invalid password",
"dataType": {
"type": "PASSWORD"
}
},
{
"order": 3,
"systemName": "title",
"friendlyName": "Login",
"dataType": {
"type": "BUTTON",
"submit": true
}
}
]
And it makes the call over and over and over
This exact code works on my ubuntu dev box, but is failing as abovw on my windows box

Answer 1

I think there is some issue with the way you are passing down the headers, look into the documentation to have a better idea.

Answer 2

Put your function in the body of your component where you're using useEffect and wrap it with useCallback like this:
const getLocalJson = useCallback( async (url, headers) => {
console.log(url)
const resp = await fetch(url, {'headers': headers});
const json = await resp.json();
return json;
},[])