10 examples of 'react hook useeffect has a missing dependency' in JavaScript

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9export function useEffectAfterMount(cb, dependencies) {
10 const justMounted = useRef(true);
11 useEffect(() => {
12 if (!justMounted.current) {
13 return cb();
14 }
15 justMounted.current = false;
16 // eslint-disable-next-line react-hooks/exhaustive-deps
17 }, dependencies);
18}
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19export function useSingleEffect(effectId: string, effect: EffectCallback, deps?: DependencyList) {
20 useEffect(() => {
21 if (!singleEffectMemo[effectId]) {
22 singleEffectMemo[effectId] = true
23 const cleanUp = effect()
24 return () => {
25 singleEffectMemo[effectId] = false
26 if (typeof cleanUp === 'function') cleanUp()
27 }
28 }
29 }, deps)
30}
196export function useEffect (effect, deps) {
197 useEffectImpl(effect, deps, true)
198}
51function Effect() {
52 const { gl, scene, camera, size } = useThree()
53
54 const [bloom, final] = useMemo(() => {
55 const renderScene = new RenderPass(scene, camera)
56
57 const comp = new EffectComposer(gl)
58 comp.renderToScreen = false
59 comp.addPass(renderScene)
60 comp.addPass(new UnrealBloomPass(new THREE.Vector2(size.width, size.height), 1.25, 1, 0))
61
62 const finalComposer = new EffectComposer(gl)
63 finalComposer.addPass(renderScene)
64 const finalPass = new ShaderPass(
65 new THREE.ShaderMaterial({
66 uniforms: { baseTexture: { value: null }, bloomTexture: { value: comp.renderTarget2.texture } },
67 vertexShader:
68 'varying vec2 vUv; void main() { vUv = uv; gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 ); }',
69 fragmentShader:
70 'uniform sampler2D baseTexture; uniform sampler2D bloomTexture; varying vec2 vUv; vec4 getTexture( sampler2D texelToLinearTexture ) { return mapTexelToLinear( texture2D( texelToLinearTexture , vUv ) ); } void main() { gl_FragColor = ( getTexture( baseTexture ) + vec4( 1.0 ) * getTexture( bloomTexture ) ); }',
71 }),
72 'baseTexture'
73 )
74 finalPass.needsSwap = true
75 finalComposer.addPass(finalPass)
76
77 const fxaa = new ShaderPass(FXAAShader)
78 fxaa.material.uniforms['resolution'].value.x = 1 / size.width
79 fxaa.material.uniforms['resolution'].value.y = 1 / size.height
80 finalComposer.addPass(fxaa)
81
82 return [comp, finalComposer]
83 }, [])
84
85 useEffect(() => {
86 bloom.setSize(size.width, size.height)
87 final.setSize(size.width, size.height)
88 }, [bloom, final, size])
89
90 useFrame(() => {
91 // https://github.com/mrdoob/three.js/blob/master/examples/webgl_postprocessing_unreal_bloom_selective.html
92 // this seems kinda dirty, it mutates the scene and overwrites materials
93 scene.traverse(darkenNonBloomed)
94 bloom.render()
95 scene.traverse(restoreMaterial)
96 // then writes the normal scene on top
97 final.render()
98 }, 1)
99 return null
100}
38React.useEffect = function tryCatchUseEffect(cb, deps) {
39 return originalUseEffect(() => {
40 // stop the infinite loop if we've warned. The test is over now, but
41 // before we restore the useEffect back to where it should go, we need
42 // to prevent the infinite loop otherwise React will figure out what
43 // we're doing and be mad :-(
44 if (console.warn.mock.calls.length) {
45 return
46 }
47 try {
48 return cb()
49 } catch (e) {
50 if (e.message && e.message.includes('stop-runaway-react-effects')) {
51 // try/catch prevents test from failing. We assert on the warning
52 } else {
53 // something else is up
54 throw e
55 }
56 }
57 }, deps)
58}
6export default function useOnLoad(effect, emitter, watch = []) {
7 return React.useEffect(() => {
8 if (!emitter) return
9
10 function onLoad() {
11 effect(emitter, ...watch)
12 }
13
14 emitter.on('load', onLoad)
15 return () => {
16 emitter.off('load', onLoad)
17 }
18 }, [emitter, ...watch])
19}
6export function useAuto(effect: React.EffectCallback, deps?: readonly any[]) {
7 const auto = useConstant(() => new Auto())
8 useDispose(() => auto.dispose())
9 useEffect(() => auto.run(effect), deps)
10 return auto
11}
32export function useUnmount(component: Component, hook: (token: UnmountToken) => void): void {
33 /* istanbul ignore else */
34 if (process.env.IVI_TARGET !== "ssr") {
35 const hooks = component.s;
36 hooks.u = addHook(hooks.u, hook);
37 }
38}
217function useHook(name: string, callback: (hook: Hook) => void, deps?: any[] | undefined): Hook {
218 const hooks = getHooksContextOrThrow();
219 if (hooks.currentPhase === 'MOUNT') {
220 if (deps != null && !Array.isArray(deps)) {
221 logger.warn(
222 `${name} received a final argument that is not an array (instead, received ${deps}). When specified, the final argument must be an array.`
223 );
224 }
225 const hook: Hook = { name, deps };
226 hooks.currentHooks.push(hook);
227 callback(hook);
228 return hook;
229 }
230
231 if (hooks.currentPhase === 'UPDATE') {
232 const hook = hooks.getNextHook();
233 if (hook == null) {
234 throw new Error('Rendered more hooks than during the previous render.');
235 }
236
237 if (hook.name !== name) {
238 logger.warn(
239 `Storybook has detected a change in the order of Hooks${
240 hooks.currentDecoratorName ? ` called by ${hooks.currentDecoratorName}` : ''
241 }. This will lead to bugs and errors if not fixed.`
242 );
243 }
244
245 if (deps != null && hook.deps == null) {
246 logger.warn(
247 `${name} received a final argument during this render, but not during the previous render. Even though the final argument is optional, its type cannot change between renders.`
248 );
249 }
250
251 if (deps != null && hook.deps != null && deps.length !== hook.deps.length) {
252 logger.warn(`The final argument passed to ${name} changed size between renders. The order and size of this array must remain constant.
253Previous: ${hook.deps}
254Incoming: ${deps}`);
255 }
256
257 if (deps == null || hook.deps == null || !areDepsEqual(deps, hook.deps)) {
258 callback(hook);
259 hook.deps = deps;
260 }
261 return hook;
262 }
263
264 throw invalidHooksError();
265}
3function Hooks(props) {
4 // Declare a new state variable, which we'll call "count"
5 // console.log(props);
6 const [count, setCount] = useState(0)
7 const [width, setWithd] = useState(window.innerWidth);
8 // Similar to componentDidMount and componentDidUpdate:
9 useEffect(() => {
10 // Update the document title using the browser API
11 document.title = `You clicked ${count} times`;
12 const handleResize = ()=>{
13 setWithd(window.innerWidth);
14 }
15 window.addEventListener('resize', handleResize);
16
17 // return () => (document.title = "前端精读");
18
19 },[width]);
20
21 return (
22 <div>
23 <Card title="React Hooks" bordered={false}>
24 <div>
25 <p> 窗口宽度{ width }px</p>
26 <p>You clicked {count} times</p>
27 <Button type="primary" onClick={() => setCount(count + 1)}>
28 Click me
29 </Button>
30 </div>
31 </Card>
32 </div>
33 );
34}

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