Compare commits
1 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
|
|
b4921db235 |
@@ -2,23 +2,17 @@
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## Input
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```javascript
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// @validateNoDerivedComputationsInEffects_exp @loggerTestOnly
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// @validateNoDerivedComputationsInEffects_exp
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function Component({prop}) {
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const [s, setS] = useState();
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const [second, setSecond] = useState(prop);
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function Component({ prop }) {
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const [s, setS] = useState(prop)
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const [second, setSecond] = useState(prop)
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/*
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* `second` is a source of state. It will inherit the value of `prop` in
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* the first render, but after that it will no longer be updated when
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* `prop` changes. So we shouldn't consider `second` as being derived from
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* `prop`
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*/
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useEffect(() => {
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setS(second);
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}, [second]);
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setS(second)
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}, [second])
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return <div>{s}</div>;
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return <div>{s}</div>
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}
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```
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@@ -26,12 +20,12 @@ function Component({prop}) {
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## Code
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```javascript
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import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects_exp @loggerTestOnly
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import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects_exp
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function Component(t0) {
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const $ = _c(5);
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const { prop } = t0;
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const [s, setS] = useState();
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const [s, setS] = useState(prop);
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const [second] = useState(prop);
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let t1;
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let t2;
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@@ -60,13 +54,6 @@ function Component(t0) {
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}
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```
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## Logs
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```
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{"kind":"CompileError","detail":{"options":{"description":"Using an effect triggers an additional render which can hurt performance and user experience, potentially briefly showing stale values to the user\n\nThis setState call is setting a derived value that depends on the following reactive sources:\n\nState: [second]\n\nData Flow Tree:\n└── second (State)\n\nSee: https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state","category":"EffectDerivationsOfState","reason":"You might not need an effect. Derive values in render, not effects.","details":[{"kind":"error","loc":{"start":{"line":14,"column":4,"index":443},"end":{"line":14,"column":8,"index":447},"filename":"usestate-derived-from-prop-no-show-in-data-flow-tree.ts","identifierName":"setS"},"message":"This should be computed during render, not in an effect"}]}},"fnLoc":null}
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{"kind":"CompileSuccess","fnLoc":{"start":{"line":3,"column":0,"index":64},"end":{"line":18,"column":1,"index":500},"filename":"usestate-derived-from-prop-no-show-in-data-flow-tree.ts"},"fnName":"Component","memoSlots":5,"memoBlocks":2,"memoValues":3,"prunedMemoBlocks":0,"prunedMemoValues":0}
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```
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### Eval output
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(kind: exception) Fixture not implemented
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@@ -1,4 +1,4 @@
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// @validateNoDerivedComputationsInEffects_exp @loggerTestOnly
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// @validateNoDerivedComputationsInEffects_exp
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function Component({prop}) {
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const [s, setS] = useState();
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@@ -10,17 +10,11 @@
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'use strict';
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let React;
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let ReactDOM;
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let ReactDOMClient;
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let Scheduler;
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let act;
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let Activity;
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let useState;
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let useLayoutEffect;
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let useEffect;
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let LegacyHidden;
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let assertLog;
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let Suspense;
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let ReactDOM;
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let ReactDOMClient;
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let act;
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describe('ReactDOMActivity', () => {
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let container;
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@@ -28,19 +22,11 @@ describe('ReactDOMActivity', () => {
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beforeEach(() => {
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jest.resetModules();
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React = require('react');
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Scheduler = require('scheduler/unstable_mock');
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Activity = React.Activity;
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useState = React.useState;
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Suspense = React.Suspense;
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useState = React.useState;
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LegacyHidden = React.unstable_LegacyHidden;
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useLayoutEffect = React.useLayoutEffect;
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useEffect = React.useEffect;
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ReactDOM = require('react-dom');
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ReactDOMClient = require('react-dom/client');
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const InternalTestUtils = require('internal-test-utils');
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act = InternalTestUtils.act;
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assertLog = InternalTestUtils.assertLog;
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act = require('internal-test-utils').act;
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container = document.createElement('div');
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document.body.appendChild(container);
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});
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@@ -49,11 +35,6 @@ describe('ReactDOMActivity', () => {
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document.body.removeChild(container);
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});
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function Text(props) {
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Scheduler.log(props.text);
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return <span prop={props.text}>{props.children}</span>;
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}
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// @gate enableActivity
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it(
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'hiding an Activity boundary also hides the direct children of any ' +
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@@ -72,7 +53,7 @@ describe('ReactDOMActivity', () => {
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);
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}
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function App() {
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function App({portalContents}) {
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return (
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<Accordion>
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<div>
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@@ -118,7 +99,7 @@ describe('ReactDOMActivity', () => {
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);
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}
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function App() {
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function App({portalContents}) {
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return (
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<Activity mode="hidden">
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<div>
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@@ -150,416 +131,4 @@ describe('ReactDOMActivity', () => {
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);
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},
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);
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// @gate enableActivity
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it('hides new portals added to an already hidden tree', async () => {
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function Child() {
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return <Text text="Child" />;
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}
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const portalContainer = document.createElement('div');
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function Portal({children}) {
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return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
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}
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const root = ReactDOMClient.createRoot(container);
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// Mount hidden tree.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Text text="Parent" />
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</Activity>,
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);
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});
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assertLog(['Parent']);
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expect(container.innerHTML).toBe(
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'<span prop="Parent" style="display: none;"></span>',
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);
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expect(portalContainer.innerHTML).toBe('');
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// Add a portal inside the hidden tree.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Text text="Parent" />
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<Portal>
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<Child />
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</Portal>
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</Activity>,
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);
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});
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assertLog(['Parent', 'Child']);
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expect(container.innerHTML).toBe(
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'<span prop="Parent" style="display: none;"></span><div style="display: none;"></div>',
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);
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expect(portalContainer.innerHTML).toBe(
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'<span prop="Child" style="display: none;"></span>',
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);
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// Now reveal it.
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await act(() => {
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root.render(
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<Activity mode="visible">
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<Text text="Parent" />
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<Portal>
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<Child />
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</Portal>
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</Activity>,
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);
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});
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assertLog(['Parent', 'Child']);
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expect(container.innerHTML).toBe(
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'<span prop="Parent" style=""></span><div style=""></div>',
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);
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expect(portalContainer.innerHTML).toBe(
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'<span prop="Child" style=""></span>',
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);
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});
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// @gate enableActivity
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it('hides new insertions inside an already hidden portal', async () => {
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function Child({text}) {
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useLayoutEffect(() => {
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Scheduler.log(`Mount layout ${text}`);
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return () => {
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Scheduler.log(`Unmount layout ${text}`);
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};
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}, [text]);
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return <Text text={text} />;
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}
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const portalContainer = document.createElement('div');
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function Portal({children}) {
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return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
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}
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const root = ReactDOMClient.createRoot(container);
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// Mount hidden tree.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Portal>
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<Child text="A" />
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</Portal>
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</Activity>,
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);
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});
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assertLog(['A']);
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expect(container.innerHTML).toBe('<div style="display: none;"></div>');
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expect(portalContainer.innerHTML).toBe(
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'<span prop="A" style="display: none;"></span>',
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);
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// Add a node inside the hidden portal.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Portal>
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<Child text="A" />
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<Child text="B" />
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</Portal>
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</Activity>,
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);
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});
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assertLog(['A', 'B']);
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expect(container.innerHTML).toBe('<div style="display: none;"></div>');
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expect(portalContainer.innerHTML).toBe(
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'<span prop="A" style="display: none;"></span><span prop="B" style="display: none;"></span>',
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);
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// Now reveal it.
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await act(() => {
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root.render(
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<Activity mode="visible">
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<Portal>
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<Child text="A" />
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<Child text="B" />
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</Portal>
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</Activity>,
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);
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});
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assertLog(['A', 'B', 'Mount layout A', 'Mount layout B']);
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expect(container.innerHTML).toBe('<div style=""></div>');
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expect(portalContainer.innerHTML).toBe(
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'<span prop="A" style=""></span><span prop="B" style=""></span>',
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);
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});
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// @gate enableActivity
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it('reveal an inner Suspense boundary without revealing an outer Activity on the same host child', async () => {
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const promise = new Promise(() => {});
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function Child({showInner}) {
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useLayoutEffect(() => {
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Scheduler.log('Mount layout');
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return () => {
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Scheduler.log('Unmount layout');
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};
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}, []);
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return (
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<>
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{showInner ? null : promise}
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<Text text="Child" />
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</>
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);
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}
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const portalContainer = document.createElement('div');
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function Portal({children}) {
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return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
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}
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const root = ReactDOMClient.createRoot(container);
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// Prerender the whole tree.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Portal>
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<Suspense name="Inner" fallback={<span>Loading</span>}>
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<Child showInner={true} />
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</Suspense>
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</Portal>
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</Activity>,
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);
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});
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assertLog(['Child']);
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expect(container.innerHTML).toBe('<div style="display: none;"></div>');
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expect(portalContainer.innerHTML).toBe(
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'<span prop="Child" style="display: none;"></span>',
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);
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// Re-suspend the inner.
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await act(() => {
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root.render(
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<Activity mode="hidden">
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<Portal>
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<Suspense name="Inner" fallback={<span>Loading</span>}>
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<Child showInner={false} />
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</Suspense>
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</Portal>
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</Activity>,
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);
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});
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assertLog([]);
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expect(container.innerHTML).toBe('<div style="display: none;"></div>');
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expect(portalContainer.innerHTML).toBe(
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'<span prop="Child" style="display: none;"></span><span style="display: none;">Loading</span>',
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);
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// Toggle to visible while suspended.
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await act(() => {
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root.render(
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<Activity mode="visible">
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<Portal>
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<Suspense name="Inner" fallback={<span>Loading</span>}>
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<Child showInner={false} />
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</Suspense>
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</Portal>
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</Activity>,
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);
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});
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assertLog([]);
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expect(container.innerHTML).toBe('<div style=""></div>');
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expect(portalContainer.innerHTML).toBe(
|
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'<span prop="Child" style="display: none;"></span><span style="">Loading</span>',
|
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);
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|
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// Now reveal.
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await act(() => {
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root.render(
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<Activity mode="visible">
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<Portal>
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<Suspense name="Inner" fallback={<span>Loading</span>}>
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<Child showInner={true} />
|
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</Suspense>
|
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</Portal>
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</Activity>,
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);
|
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});
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assertLog(['Child', 'Mount layout']);
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expect(container.innerHTML).toBe('<div style=""></div>');
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expect(portalContainer.innerHTML).toBe(
|
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'<span prop="Child" style=""></span>',
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);
|
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});
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// @gate enableActivity
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it('mounts/unmounts layout effects in portal when visibility changes (starting visible)', async () => {
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function Child() {
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useLayoutEffect(() => {
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Scheduler.log('Mount layout');
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return () => {
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Scheduler.log('Unmount layout');
|
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};
|
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}, []);
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return <Text text="Child" />;
|
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}
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|
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const portalContainer = document.createElement('div');
|
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|
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function Portal({children}) {
|
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return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
|
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}
|
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|
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const root = ReactDOMClient.createRoot(container);
|
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// Mount visible tree.
|
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await act(() => {
|
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root.render(
|
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<Activity mode="visible">
|
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<Portal>
|
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<Child />
|
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</Portal>
|
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</Activity>,
|
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);
|
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});
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assertLog(['Child', 'Mount layout']);
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expect(container.innerHTML).toBe('<div></div>');
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expect(portalContainer.innerHTML).toBe('<span prop="Child"></span>');
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// Hide the tree. The layout effect is unmounted.
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await act(() => {
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root.render(
|
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<Activity mode="hidden">
|
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<Portal>
|
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<Child />
|
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</Portal>
|
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</Activity>,
|
||||
);
|
||||
});
|
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assertLog(['Unmount layout', 'Child']);
|
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expect(container.innerHTML).toBe('<div style="display: none;"></div>');
|
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expect(portalContainer.innerHTML).toBe(
|
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'<span prop="Child" style="display: none;"></span>',
|
||||
);
|
||||
});
|
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|
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// @gate enableActivity
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it('mounts/unmounts layout effects in portal when visibility changes (starting hidden)', async () => {
|
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function Child() {
|
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useLayoutEffect(() => {
|
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Scheduler.log('Mount layout');
|
||||
return () => {
|
||||
Scheduler.log('Unmount layout');
|
||||
};
|
||||
}, []);
|
||||
return <Text text="Child" />;
|
||||
}
|
||||
|
||||
const portalContainer = document.createElement('div');
|
||||
|
||||
function Portal({children}) {
|
||||
return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
|
||||
}
|
||||
|
||||
const root = ReactDOMClient.createRoot(container);
|
||||
// Mount hidden tree.
|
||||
await act(() => {
|
||||
root.render(
|
||||
<Activity mode="hidden">
|
||||
<Portal>
|
||||
<Child />
|
||||
</Portal>
|
||||
</Activity>,
|
||||
);
|
||||
});
|
||||
// No layout effect.
|
||||
assertLog(['Child']);
|
||||
expect(container.innerHTML).toBe('<div style="display: none;"></div>');
|
||||
expect(portalContainer.innerHTML).toBe(
|
||||
'<span prop="Child" style="display: none;"></span>',
|
||||
);
|
||||
|
||||
// Unhide the tree. The layout effect is mounted.
|
||||
await act(() => {
|
||||
root.render(
|
||||
<Activity mode="visible">
|
||||
<Portal>
|
||||
<Child />
|
||||
</Portal>
|
||||
</Activity>,
|
||||
);
|
||||
});
|
||||
assertLog(['Child', 'Mount layout']);
|
||||
expect(container.innerHTML).toBe('<div style=""></div>');
|
||||
expect(portalContainer.innerHTML).toBe(
|
||||
'<span prop="Child" style=""></span>',
|
||||
);
|
||||
});
|
||||
|
||||
// @gate enableLegacyHidden
|
||||
it('does not toggle effects or hide nodes for LegacyHidden component inside portal', async () => {
|
||||
function Child() {
|
||||
useLayoutEffect(() => {
|
||||
Scheduler.log('Mount layout');
|
||||
return () => {
|
||||
Scheduler.log('Unmount layout');
|
||||
};
|
||||
}, []);
|
||||
useEffect(() => {
|
||||
Scheduler.log('Mount passive');
|
||||
return () => {
|
||||
Scheduler.log('Unmount passive');
|
||||
};
|
||||
}, []);
|
||||
return <Text text="Child" />;
|
||||
}
|
||||
|
||||
const portalContainer = document.createElement('div');
|
||||
|
||||
function Portal({children}) {
|
||||
return <div>{ReactDOM.createPortal(children, portalContainer)}</div>;
|
||||
}
|
||||
|
||||
const root = ReactDOMClient.createRoot(container);
|
||||
// Mount visible tree.
|
||||
await act(() => {
|
||||
root.render(
|
||||
<LegacyHidden mode="visible">
|
||||
<Portal>
|
||||
<Child />
|
||||
</Portal>
|
||||
</LegacyHidden>,
|
||||
);
|
||||
});
|
||||
assertLog(['Child', 'Mount layout', 'Mount passive']);
|
||||
expect(container.innerHTML).toBe('<div></div>');
|
||||
expect(portalContainer.innerHTML).toBe('<span prop="Child"></span>');
|
||||
|
||||
// Hide the tree.
|
||||
await act(() => {
|
||||
root.render(
|
||||
<LegacyHidden mode="hidden">
|
||||
<Portal>
|
||||
<Child />
|
||||
</Portal>
|
||||
</LegacyHidden>,
|
||||
);
|
||||
});
|
||||
// Effects not unmounted.
|
||||
assertLog(['Child']);
|
||||
expect(container.innerHTML).toBe('<div></div>');
|
||||
expect(portalContainer.innerHTML).toBe('<span prop="Child"></span>');
|
||||
|
||||
// Unhide the tree.
|
||||
await act(() => {
|
||||
root.render(
|
||||
<LegacyHidden mode="visible">
|
||||
<Portal>
|
||||
<Child />
|
||||
</Portal>
|
||||
</LegacyHidden>,
|
||||
);
|
||||
});
|
||||
// Effects already mounted.
|
||||
assertLog(['Child']);
|
||||
expect(container.innerHTML).toBe('<div></div>');
|
||||
expect(portalContainer.innerHTML).toBe('<span prop="Child"></span>');
|
||||
});
|
||||
});
|
||||
|
||||
Reference in New Issue
Block a user