docs(react-native): delay fn returned a function insted of data (#4189)

Author: dducluzeaud

examples/react/react-native/src/lib/api.ts

@@ -12,28 +12,33 @@ export type MovieDetails = Movie & {
   };
 };
 
-function delay(t: number, v: () => void) {
+function delay(t: number) {
   return new Promise(function (resolve) {
-    setTimeout(resolve.bind(null, v), t);
+    setTimeout(resolve, t);
   });
 }
 
 export async function fetchMovies() {
   console.log('fetchMovies');
-  return delay(200 + Math.floor(Math.random() * 2000), () =>
-    movies
-      .slice(0, 100)
-      .map((movie) => ({ title: movie.title, year: movie.year }))
-  ) as Promise<Movie[]>;
+
+  await delay(200 + Math.floor(Math.random() * 2000));
+
+  return movies
+    .slice(0, 100)
+    .map((movie) => ({ title: movie.title, year: movie.year })) as Promise<
+    Movie[]
+  >;
 }
 
 export async function fetchMovie(title: string) {
   console.log('fetchMovie', title);
-  return delay(200 + Math.floor(Math.random() * 2000), () => {
-    const result = movies.filter((item) => item.title === title);
-    if (result.length == 0) {
-      throw new Error('Movie not found');
-    }
-    return result[0];
-  }) as Promise<MovieDetails>;
+
+  await delay(200 + Math.floor(Math.random() * 2000));
+
+  const result = movies.filter((item) => item.title === title);
+
+  if (result.length == 0) {
+    throw new Error('Movie not found');
+  }
+  return result[0] as Promise<MovieDetails>;
 }