[fix] Order of ref merging

Ensure internal refs are called before the forwardedRef. This ensures that the
DOM element mutation performed by usePlatformMethods occurs before user-space
refs are called.

Ref #1749

packages/react-native-web/src/exports/Picker/index.js

@@ -47,7 +47,6 @@ const Picker = forwardRef<PickerProps, *>((props, forwardedRef) => {
   } = props;
 
   const hostRef = useRef(null);
-  const setRef = useMergeRefs(forwardedRef, hostRef);
 
   function handleChange(e: Object) {
     const { selectedIndex, value } = e.target;
@@ -56,18 +55,21 @@ const Picker = forwardRef<PickerProps, *>((props, forwardedRef) => {
     }
   }
 
-  const supportedProps = {
+  const supportedProps: any = {
     children,
     disabled: enabled === false ? true : undefined,
     onChange: handleChange,
-    ref: setRef,
     style: [styles.initial, style],
     testID,
     value: selectedValue,
     ...other
   };
 
-  usePlatformMethods(hostRef, supportedProps);
+  const platformMethodsRef = usePlatformMethods(supportedProps);
+
+  const setRef = useMergeRefs(hostRef, platformMethodsRef, forwardedRef);
+
+  supportedProps.ref = setRef;
 
   return createElement('select', supportedProps);
 });

packages/react-native-web/src/exports/Text/index.js

@@ -100,7 +100,6 @@ const Text = forwardRef<TextProps, *>((props, forwardedRef) => {
 
   const hasTextAncestor = useContext(TextAncestorContext);
   const hostRef = useRef(null);
-  const setRef = useMergeRefs(forwardedRef, hostRef);
 
   const classList = [
     classes.text,
@@ -155,10 +154,12 @@ const Text = forwardRef<TextProps, *>((props, forwardedRef) => {
     supportedProps.dir = dir != null ? dir : 'auto';
   }
   supportedProps.onClick = handleClick;
-  supportedProps.ref = setRef;
   supportedProps.style = style;
 
-  usePlatformMethods(hostRef, supportedProps);
+  const platformMethodsRef = usePlatformMethods(supportedProps);
+  const setRef = useMergeRefs(hostRef, platformMethodsRef, forwardedRef);
+
+  supportedProps.ref = setRef;
 
   const element = createElement(component, supportedProps);
 

packages/react-native-web/src/exports/TextInput/index.js

@@ -229,8 +229,6 @@ const TextInput = forwardRef<TextInputProps, *>((props, forwardedRef) => {
     [handleContentSizeChange]
   );
 
-  const setRef = useMergeRefs(forwardedRef, hostRef, imperativeRef);
-
   function handleBlur(e) {
     TextInputState._currentlyFocusedNode = null;
     if (onBlur) {
@@ -367,14 +365,17 @@ const TextInput = forwardRef<TextInputProps, *>((props, forwardedRef) => {
   supportedProps.onKeyDown = handleKeyDown;
   supportedProps.onSelect = handleSelectionChange;
   supportedProps.readOnly = !editable;
-  supportedProps.ref = setRef;
   supportedProps.rows = multiline ? numberOfLines : undefined;
   supportedProps.spellCheck = spellCheck != null ? spellCheck : autoCorrect;
   supportedProps.style = style;
   supportedProps.type = multiline ? undefined : type;
   supportedProps.inputMode = inputMode;
 
-  usePlatformMethods(hostRef, supportedProps);
+  const platformMethodsRef = usePlatformMethods(supportedProps);
+
+  const setRef = useMergeRefs(hostRef, platformMethodsRef, imperativeRef, forwardedRef);
+
+  supportedProps.ref = setRef;
 
   return createElement(component, supportedProps);
 });

packages/react-native-web/src/exports/View/index.js

@@ -102,7 +102,6 @@ const View = forwardRef<ViewProps, *>((props, forwardedRef) => {
 
   const hasTextAncestor = useContext(TextAncestorContext);
   const hostRef = useRef(null);
-  const setRef = useMergeRefs(forwardedRef, hostRef);
 
   const classList = [classes.view];
   const style = StyleSheet.compose(
@@ -132,10 +131,12 @@ const View = forwardRef<ViewProps, *>((props, forwardedRef) => {
 
   const supportedProps = pickProps(props);
   supportedProps.classList = classList;
-  supportedProps.ref = setRef;
   supportedProps.style = style;
 
-  usePlatformMethods(hostRef, supportedProps);
+  const platformMethodsRef = usePlatformMethods(supportedProps);
+  const setRef = useMergeRefs(hostRef, platformMethodsRef, forwardedRef);
+
+  supportedProps.ref = setRef;
 
   return createElement('div', supportedProps);
 });

packages/react-native-web/src/hooks/usePlatformMethods.js

@@ -7,11 +7,9 @@
  * @flow
  */
 
-import type { ElementRef } from 'react';
-
 import UIManager from '../exports/UIManager';
 import createDOMProps from '../modules/createDOMProps';
-import { useImperativeHandle, useRef } from 'react';
+import { useMemo, useRef } from 'react';
 
 function setNativeProps(node, nativeProps, classList, pointerEvents, style, previousStyleRef) {
   if (node != null && nativeProps) {
@@ -45,14 +43,12 @@ function setNativeProps(node, nativeProps, classList, pointerEvents, style, prev
  * Adds non-standard methods to the hode element. This is temporarily until an
  * API like `ReactNative.measure(hostRef, callback)` is added to React Native.
  */
-export default function usePlatformMethods(hostRef: ElementRef<any>, props: Object) {
+export default function usePlatformMethods(props: Object) {
   const previousStyleRef = useRef(null);
   const { classList, style, pointerEvents } = props;
 
-  useImperativeHandle(
-    hostRef,
-    () => {
-      const hostNode = hostRef.current;
+  return useMemo(
+    () => (hostNode: any) => {
       if (hostNode != null) {
         hostNode.measure = callback => UIManager.measure(hostNode, callback);
         hostNode.measureLayout = (relativeToNode, success, failure) =>
@@ -63,6 +59,6 @@ export default function usePlatformMethods(hostRef: ElementRef<any>, props: Obje
       }
       return hostNode;
     },
-    [hostRef, classList, pointerEvents, style]
+    [classList, pointerEvents, style]
   );
 }