backup trace update

Dockerfile

@@ -16,7 +16,6 @@ RUN npm install
 # copy app sources
 COPY ./src ./src
 COPY tsconfig.json vite.config.ts analyticsrc.json index.html /
-RUN echo $(ls)
 RUN npm run build
 
 FROM node:16-alpine

src/app/hooks/useTraceUpdate.js

@@ -0,0 +1,19 @@
+import { useEffect, useRef } from "react"
+
+function useTraceUpdate(props, component) {
+  const prev = useRef(props)
+  useEffect(() => {
+    const changedProps = Object.entries(props).reduce((ps, [k, v]) => {
+      if (prev.current[k] !== v) {
+        ps[k] = [prev.current[k], v]
+      }
+      return ps
+    }, {})
+    if (Object.keys(changedProps).length > 0) {
+      console.log(component + ": Changed props:", changedProps)
+    }
+    prev.current = props
+  })
+}
+
+export default useTraceUpdate