fix: update abortcontroller/abortSignal for use in Reactive Native

no access to React Native, instead tested for existence of AbortSignal.timeout,
if there, use it; otherwise, use a general timeout on the AbortController

should fix #92

lib/useButter.js

@@ -22,6 +22,7 @@ export default function useButter(type, butterConfig) {
     const friendlyType = type.replace(type[0], type[0].toUpperCase());
 
     const {
+        abortOnTimeout,
         applyRequestUrlForErrorMessages,
         cancelRequest,
         cleanup,
@@ -77,7 +78,13 @@ export default function useButter(type, butterConfig) {
         try {
             // use static abortSignal timeout functionality to relay a cancelation 
             // when timeout is reached
-            const timeoutSignal = AbortSignal.timeout(config.timeout);
+            // if AbortSignal.timeout doestn't exist (React Native), use a regular timeotu
+            const timeoutSignal = AbortSignal.timeout 
+                ? AbortSignal.timeout(config.timeout)
+                : setTimeout(
+                    () => abortOnTimeout(config.timeout),
+                    config.timeout
+                )
 
             const response = await fetch(
                 `${apiEndpoint}?${new URLSearchParams(params)}`,
@@ -87,10 +94,18 @@ export default function useButter(type, butterConfig) {
                     headers,
                     // use either the above timeout or
                     // the explicit AbortController cancelRequest to cancel request
-                    signal: AbortSignal.any([signal, timeoutSignal])
+                    signal: AbortSignal.timeout
+                        ? AbortSignal.any([signal, timeoutSignal])
+                        : signal
                 }
             );
 
+            if (!AbortSignal.timeout) {
+                // if we are running on a regular timout, 
+                // clear it after its use
+                clearTimeout(timeoutSignal)
+            }
+
             cleanup();
 
             if (response.status !== 200) {

lib/utils/useFetchController.js

@@ -47,14 +47,28 @@ export default function useFetchController(type) {
      * @function cancelRequest
      * @returns {Promise<void>} A promise that resolves when the request has been aborted.
      */
-    async function cancelRequest() {
-        await controller.abort(
+    function cancelRequest() {
+        controller.abort(
             generateErrorMessage("Request cancelled")
         );
 
         return;
     }
 
+    /**
+     * Aborts the current request due to a timeout.
+     * 
+     * @param {number} timeout - The timeout duration in milliseconds after which the request was aborted.
+     * @returns {void}
+     */
+    function abortOnTimeout(timeout) {
+        controller.abort(
+            generateErrorMessage(`Request timed out after ${timeout}ms.`)
+        );
+
+        return;
+    }
+
     /**
      * Cleans up resources by nullifying the AbortController to prevent memory leaks.
      */
@@ -88,6 +102,7 @@ export default function useFetchController(type) {
     }
 
     return {
+        abortOnTimeout,
         applyRequestUrlForErrorMessages,
         cancelRequest,
         cleanup,