Remove __self and __source location from elements (facebook#28265)

Along with all the places using it like the `_debugSource` on Fiber.
This still lets them be passed into `createElement` (and JSX dev
runtime) since those can still be used in existing already compiled code
and we don't want that to start spreading to DOM attributes.

We used to have a DEV mode that compiles the source location of JSX into
the compiled output. This was nice because we could get the actual call
site of the JSX (instead of just somewhere in the component). It had a
bunch of issues though:

- It only works with JSX.
- The way this source location is compiled is different in all the
pipelines along the way. It relies on this transform being first and the
source location we want to extract but it doesn't get preserved along
source maps and don't have a way to be connected to the source hosted by
the source maps. Ideally it should just use the mechanism other source
maps use.
- Since it's expensive it only works in DEV so if it's used for
component stacks it would vary between dev and prod.
- It only captures the callsite of the JSX and not the stack between the
component and that callsite. In the happy case it's in the component but
not always.

Instead, we have another zero-cost trick to extract the call site of
each component lazily only if it's needed. This ensures that component
stacks are the same in DEV and PROD. At the cost of worse line number
information.

The better way to get the JSX call site would be to get it from `new
Error()` or `console.createTask()` inside the JSX runtime which can
capture the whole stack in a consistent way with other source mappings.
We might explore that in the future.

This removes source location info from React DevTools and React Native
Inspector. The "jump to source code" feature or inspection can be made
lazy instead by invoking the lazy component stack frame generation. That
way it can be made to work in prod too. The filtering based on file path
is a bit trickier.

When redesigned this UI should ideally also account for more than one
stack frame.

With this change the DEV only Babel transforms are effectively
deprecated since they're not necessary for anything.

Author: sebmarkbage

packages/react-client/src/ReactFlightClient.js

@@ -475,18 +475,6 @@ function createElement(
       writable: true,
       value: true, // This element has already been validated on the server.
     });
-    Object.defineProperty(element, '_self', {
-      configurable: false,
-      enumerable: false,
-      writable: false,
-      value: null,
-    });
-    Object.defineProperty(element, '_source', {
-      configurable: false,
-      enumerable: false,
-      writable: false,
-      value: null,
-    });
   }
   return element;
 }

packages/react-devtools-inline/__tests__/__e2e__/components.test.js

@@ -92,14 +92,15 @@ test.describe('Components', () => {
           ? valueElement.value
           : valueElement.innerText;
 
-        return [name, value, source.innerText];
+        return [name, value, source ? source.innerText : null];
       },
       {name: isEditableName, value: isEditableValue}
     );
 
     expect(propName).toBe('label');
     expect(propValue).toBe('"one"');
-    expect(sourceText).toMatch(/ListApp[a-zA-Z]*\.js/);
+    expect(sourceText).toBe(null);
+    // TODO: expect(sourceText).toMatch(/ListApp[a-zA-Z]*\.js/);
   });
 
   test('should allow props to be edited', async () => {

packages/react-devtools-shared/src/__tests__/storeComponentFilters-test.js

@@ -242,7 +242,13 @@ describe('Store component filters', () => {
         ]),
     );
 
-    expect(store).toMatchInlineSnapshot(`[root]`);
+    // TODO: Filtering should work on component location.
+    // expect(store).toMatchInlineSnapshot(`[root]`);
+    expect(store).toMatchInlineSnapshot(`
+      [root]
+        ▾ <Component>
+            <div>
+    `);
 
     await actAsync(
       async () =>

packages/react-devtools-shared/src/backend/legacy/renderer.js

@@ -773,12 +773,10 @@ export function attach(
     let owners = null;
     let props = null;
     let state = null;
-    let source = null;
 
     const element = internalInstance._currentElement;
     if (element !== null) {
       props = element.props;
-      source = element._source != null ? element._source : null;
 
       let owner = element._owner;
       if (owner) {
@@ -851,9 +849,6 @@ export function attach(
       // List of owners
       owners,
 
-      // Location of component in source code.
-      source,
-
       rootType: null,
       rendererPackageName: null,
       rendererVersion: null,

packages/react-devtools-shared/src/backend/renderer.js

@@ -958,7 +958,7 @@ export function attach(
 
   // NOTICE Keep in sync with get*ForFiber methods
   function shouldFilterFiber(fiber: Fiber): boolean {
-    const {_debugSource, tag, type, key} = fiber;
+    const {tag, type, key} = fiber;
 
     switch (tag) {
       case DehydratedSuspenseComponent:
@@ -1010,15 +1010,15 @@ export function attach(
       }
     }
 
-    if (_debugSource != null && hideElementsWithPaths.size > 0) {
-      const {fileName} = _debugSource;
-      // eslint-disable-next-line no-for-of-loops/no-for-of-loops
-      for (const pathRegExp of hideElementsWithPaths) {
-        if (pathRegExp.test(fileName)) {
-          return true;
-        }
-      }
-    }
+    // TODO: Figure out a way to filter by path in the new model which has no debug info.
+    // if (hideElementsWithPaths.size > 0) {
+    //  const {fileName} = ...;
+    //  for (const pathRegExp of hideElementsWithPaths) {
+    //    if (pathRegExp.test(fileName)) {
+    //      return true;
+    //    }
+    //  }
+    // }
 
     return false;
   }
@@ -3132,7 +3132,6 @@ export function attach(
 
     const {
       _debugOwner,
-      _debugSource,
       stateNode,
       key,
       memoizedProps,
@@ -3362,9 +3361,6 @@ export function attach(
       // List of owners
       owners,
 
-      // Location of component in source code.
-      source: _debugSource || null,
-
       rootType,
       rendererPackageName: renderer.rendererPackageName,
       rendererVersion: renderer.version,
@@ -3725,9 +3721,6 @@ export function attach(
     if (nativeNodes !== null) {
       console.log('Nodes:', nativeNodes);
     }
-    if (result.source !== null) {
-      console.log('Location:', result.source);
-    }
     if (window.chrome || /firefox/i.test(navigator.userAgent)) {
       console.log(
         'Right-click any value to save it as a global variable for further inspection.',

packages/react-devtools-shared/src/backend/types.js

@@ -15,7 +15,6 @@
  */
 
 import type {ReactContext, Wakeable} from 'shared/ReactTypes';
-import type {Source} from 'shared/ReactElementType';
 import type {Fiber} from 'react-reconciler/src/ReactInternalTypes';
 import type {
   ComponentFilter,
@@ -280,9 +279,6 @@ export type InspectedElement = {
   // List of owners
   owners: Array<SerializedElement> | null,
 
-  // Location of component in source code.
-  source: Source | null,
-
   type: ElementType,
 
   // Meta information about the root this element belongs to.

packages/react-devtools-shared/src/backendAPI.js

@@ -226,7 +226,6 @@ export function convertInspectedElementBackendToFrontend(
     canViewSource,
     hasLegacyContext,
     id,
-    source,
     type,
     owners,
     context,
@@ -261,7 +260,7 @@ export function convertInspectedElementBackendToFrontend(
     rendererPackageName,
     rendererVersion,
     rootType,
-    source,
+    source: null, // TODO: Load source location lazily.
     type,
     owners:
       owners === null

packages/react-devtools-shared/src/frontend/types.js

@@ -14,7 +14,6 @@
  * Be mindful of backwards compatibility when making changes.
  */
 
-import type {Source} from 'shared/ReactElementType';
 import type {
   Dehydrated,
   Unserializable,
@@ -220,7 +219,7 @@ export type InspectedElement = {
   owners: Array<SerializedElement> | null,
 
   // Location of component in source code.
-  source: Source | null,
+  source: null, // TODO: Reinstate a way to load this lazily.
 
   type: ElementType,
 

packages/react-dom/src/__tests__/ReactDeprecationWarnings-test.js

@@ -131,6 +131,10 @@ describe('ReactDeprecationWarnings', () => {
         'We ask you to manually fix this case by using useRef() or createRef() instead. ' +
         'Learn more about using refs safely here: ' +
         'https://reactjs.org/link/strict-mode-string-ref',
+      'Warning: Component "Component" contains the string ref "refComponent". ' +
+        'Support for string refs will be removed in a future major release. We recommend ' +
+        'using useRef() or createRef() instead. Learn more about using refs safely here: ' +
+        'https://reactjs.org/link/strict-mode-string-ref',
     ]);
   });
 
@@ -155,14 +159,18 @@ describe('ReactDeprecationWarnings', () => {
       }
 
       ReactNoop.render(<Component />);
-      await expect(async () => await waitForAll([])).toErrorDev(
+      await expect(async () => await waitForAll([])).toErrorDev([
         'Warning: Component "Component" contains the string ref "refComponent". ' +
           'Support for string refs will be removed in a future major release. ' +
           'This case cannot be automatically converted to an arrow function. ' +
           'We ask you to manually fix this case by using useRef() or createRef() instead. ' +
           'Learn more about using refs safely here: ' +
           'https://reactjs.org/link/strict-mode-string-ref',
-      );
+        'Warning: Component "Component" contains the string ref "refComponent". ' +
+          'Support for string refs will be removed in a future major release. We recommend ' +
+          'using useRef() or createRef() instead. Learn more about using refs safely here: ' +
+          'https://reactjs.org/link/strict-mode-string-ref',
+      ]);
     });
   }
 });

packages/react-dom/src/__tests__/ReactFunctionComponent-test.js

@@ -270,7 +270,6 @@ describe('ReactFunctionComponent', () => {
         return <FunctionComponent name="A" ref={() => {}} />;
       }
     }
-    Object.defineProperty(AnonymousParentUsingJSX, 'name', {value: undefined});
 
     let instance1;
 
@@ -293,9 +292,6 @@ describe('ReactFunctionComponent', () => {
         });
       }
     }
-    Object.defineProperty(AnonymousParentNotUsingJSX, 'name', {
-      value: undefined,
-    });
 
     let instance2;
     expect(() => {