Reduce re-renders of SurahStream (SurahStream/index.tsx)

src/js/components/SurahStream/Timer.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from "react";
+import React, { useEffect, useState } from "react";
 import type { Surah, Ayah, TLocale } from "Quran";
 import { formatNumber } from "~/lib/t";
 
@@ -9,9 +9,7 @@ type Props = {
   surah: Surah;
   ayah: Maybe<Ayah>;
   isPaused: boolean;
-  isStalled: boolean;
+  audioStatus: Maybe<string>;
-  ms: number | null;
-  setMs: (n: number) => void;
   onComplete: (surah: Surah, ayah: Ayah) => void;
 };
 
@@ -20,17 +18,25 @@ export function Timer({
   surah,
   ayah,
   isPaused,
-  isStalled,
+  audioStatus,
-  ms,
-  setMs,
   onComplete,
 }: Props) {
+  const [ms, setMs] = useState<number | null>(null);
+  const isStalled = audioStatus === "wait";
+
   useEffect(() => {
-    if (ayah) {
+    if (!ayah)
+      return
     setMs(ayah.ms);
-    }
   }, [ayah?.id]);
 
+  useEffect(() => {
+    if (!ayah)
+      return
+    if (audioStatus === "play")
+      setMs(ayah.ms)
+  }, [audioStatus]);
+
   useEffect(() => {
     if (!ayah || typeof ms !== "number") {
       return;

src/js/components/SurahStream/index.tsx

@@ -23,7 +23,6 @@ export function SurahStream({ surah, locale, t }: Props) {
   const [audioStatus, setAudioStatus] = useState<Maybe<TAudioStatus>>(null);
   const [endOfStream, setEndOfStream] = useState<boolean>(false);
   const [theme, setTheme] = useTheme();
-  const [ms, setMs] = useState<number | null>(null);
   const articleRef = useRef<HTMLElement>(null);
   const audio = useMemo(() => new Audio(), []);
   const readyToRender = stream.length > 0;
@@ -36,12 +35,6 @@ export function SurahStream({ surah, locale, t }: Props) {
     }
   }, [articleRef.current, theme]);
 
-  useEffect(() => {
-    if (ayah) {
-      setMs(ayah.ms);
-    }
-  }, [ayah]);
-
   useEffect(() => {
     if (!endOfStream) {
       setStream([surah.ayat[0]]);
@@ -84,9 +77,6 @@ export function SurahStream({ surah, locale, t }: Props) {
             ayah={ayah}
             hidden={endOfStream}
             onStatusChange={status => {
-              if (status === "play") {
-                setMs(ayah.ms);
-              }
               setAudioStatus(status);
             }}
           />
@@ -101,9 +91,7 @@ export function SurahStream({ surah, locale, t }: Props) {
             surah={surah}
             ayah={ayah}
             isPaused={isPaused}
-            isStalled={audioStatus === "wait"}
+            audioStatus={audioStatus}
-            ms={ms}
-            setMs={setMs}
             onComplete={(surah, ayah) => {
               const layah = surah.ayat[surah.ayat.length - 1];
               if (!layah || !ayah) {