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https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
[compiler] Don't throw calculate in render when there is a prop function call in effects
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+13
@@ -300,6 +300,19 @@ function validateEffect(
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sourceIds: argMetadata.sourcesIds,
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});
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}
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} else if (instr.value.kind === 'CallExpression') {
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const calleeMetadata = derivationCache.get(
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instr.value.callee.identifier.id,
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);
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if (
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calleeMetadata !== undefined &&
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(calleeMetadata.typeOfValue === 'fromProps' ||
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calleeMetadata.typeOfValue === 'fromPropsAndState')
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) {
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// If the callee is a prop we can't confidently say that it should be derived in render
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return;
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}
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}
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}
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seenBlocks.add(block.id);
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+75
@@ -0,0 +1,75 @@
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## Input
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```javascript
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// @validateNoDerivedComputationsInEffects
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import {useEffect, useState} from 'react';
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function Component({propValue, onChange}) {
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const [value, setValue] = useState(null);
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useEffect(() => {
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setValue(propValue);
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onChange();
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}, [propValue]);
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return <div>{value}</div>;
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}
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export const FIXTURE_ENTRYPOINT = {
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fn: Component,
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params: [{propValue: 'test', onChange: () => {}}],
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};
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```
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## Code
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```javascript
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import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects
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import { useEffect, useState } from "react";
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function Component(t0) {
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const $ = _c(7);
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const { propValue, onChange } = t0;
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const [value, setValue] = useState(null);
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let t1;
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if ($[0] !== onChange || $[1] !== propValue) {
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t1 = () => {
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setValue(propValue);
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onChange();
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};
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$[0] = onChange;
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$[1] = propValue;
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$[2] = t1;
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} else {
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t1 = $[2];
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}
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let t2;
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if ($[3] !== propValue) {
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t2 = [propValue];
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$[3] = propValue;
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$[4] = t2;
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} else {
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t2 = $[4];
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}
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useEffect(t1, t2);
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let t3;
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if ($[5] !== value) {
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t3 = <div>{value}</div>;
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$[5] = value;
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$[6] = t3;
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} else {
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t3 = $[6];
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}
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return t3;
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}
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export const FIXTURE_ENTRYPOINT = {
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fn: Component,
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params: [{ propValue: "test", onChange: () => {} }],
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};
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```
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### Eval output
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(kind: ok) <div>test</div>
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-43
@@ -1,43 +0,0 @@
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## Input
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```javascript
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// @validateNoDerivedComputationsInEffects
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import {useEffect, useState} from 'react';
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function Component({propValue, onChange}) {
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const [value, setValue] = useState(null);
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useEffect(() => {
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setValue(propValue);
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onChange();
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}, [propValue]);
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return <div>{value}</div>;
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}
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export const FIXTURE_ENTRYPOINT = {
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fn: Component,
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params: [{propValue: 'test', onChange: () => {}}],
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};
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```
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## Error
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```
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Found 1 error:
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Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
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error.effect-contains-prop-function-call-no-error.ts:7:4
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5 | const [value, setValue] = useState(null);
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6 | useEffect(() => {
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> 7 | setValue(propValue);
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| ^^^^^^^^^^^^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
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8 | onChange();
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9 | }, [propValue]);
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10 |
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```
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