How to call a hook from an exported function since it is not inside of the body of a function component - Reactjs

user21381901
March 12, 2023
264 views
0 votes
2 Answers

I cannot access my service class methods when I convert the export to service rather than methods:

const HttpService = () => {
  
  const AUTH_TOKEN = localStorage.getItem("tokenKey");
  const { enqueueSnackbar } = useSnackbar();

  const postWithoutAuth = (url, body) => {
    const request = axios.post(url, body);
    return request.then((response) => response.data);
  };
};

export default HttpService;

I am trying to access the postWithoutAuth method as shown below:

import { HttpService } from "../../services/HttpService";
// I think I should use like this:
import HttpService from "../../services/HttpService";

const handleSubmit = (event) => {
    event.preventDefault();
    HttpService.postWithoutAuth("/auth/signup", formValues)
      .then((response) => {})
      .catch((error) => {});
  };

So, is it a proper way to call this service method?

Answers

- Unmitigated
- March 12, 2023 at 8:35 pm
- 0 votes
0
It is impossible to access a function declared inside another function that is not returned in some way.

HttpService does not look like it should be a function at all. Instead, you can directly export the postWithoutAuth function.
```
export const postWithoutAuth = (url, body) => {
    const request = axios.post(url, body);
    return request.then((response) => response.data);
};
```
Then, you can use it in another file like so:
```
import { postWithoutAuth } from "../../services/HttpService";
```
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- AhmedSbai
- March 12, 2023 at 8:36 pm
- 0 votes
0
don’t make HttpService a function but just a file in which you include all the functions you want to export :
```
export const postWithoutAuth = (url, body) => {
  const request = axios.post(url, body);
  return request.then((response) => response.data);
};
export const anotherOne= (url, body) => {
  //...
};
```
Now you can import from it :
```
import { postWithoutAuth, anotherOne } from "../../services/HttpService";
```
Update to reply to the op question update:

If you want to use a hook from the postWithoutAuth function then you pass a function to it from the parent component that uses the hook because

hooks can only be called inside of the body of a function component
```
export const postWithoutAuth = (url, body, functionHook) => {
  const request = axios.post(url, body);
  return request.then((response) => {
     response.data;
     functionHook();
  });
};
```
from the parent component :
```
import { useSnackbar } from "notistack";
import { postWithoutAuth } from "../../services/HttpService";

const Parent = () => {
  
  const { enqueueSnackbar } = useSnackbar();

  const functionHook = () => {
    enqueueSnackbar("Failed to Login", {
      variant: "error",
    });
  };
}

<div>
  <button
    onClick={() => {
      postWithoutAuth(url, body, functionHook);
    }}
  >
    Click me
  </button>
</div>;
```
You can make multiple functions similar to the functionHook in your parent component that display different alerts and you can also pass more then one function the the postWithoutAuth function and based on the responde.data you know what function to execute
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