How to use useImperativeHandle method in Playwright Internal

Best JavaScript code snippet using playwright-internal

data.js

Source:data.js Github

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1export const questions = [2 {3 question: 'Выбери цвет',4 type: 'withImage',5 options: [6 {7 image: '/​color/​black.jpg',8 id: 0,9 points: {10 useState: 10,11 useReducer: 5,12 useCallback: 3,13 useImperativeHandle: 6,14 useEffect: 5,15 useRef: 7,16 useLayoutEffect: 317 }18 },19 {20 image: '/​color/​blue.jpg',21 id: 1,22 points: {23 useState: 4,24 useReducer: 10,25 useCallback: 3,26 useImperativeHandle: 5,27 useEffect: 4,28 useRef: 4,29 useLayoutEffect: 330 }31 },32 {33 image: '/​color/​gray.jpg',34 id: 2,35 points: {36 useState: 3,37 useReducer: 4,38 useCallback: 10,39 useImperativeHandle: 4,40 useEffect: 3,41 useRef: 5,42 useLayoutEffect: 443 }44 },45 {46 image: '/​color/​green.jpg',47 id: 3,48 points: {49 useState: 3,50 useReducer: 1,51 useCallback: 5,52 useImperativeHandle: 10,53 useEffect: 3,54 useRef: 5,55 useLayoutEffect: 156 }57 },58 {59 image: '/​color/​orange.jpg',60 id: 4,61 points: {62 useState: 1,63 useReducer: 8,64 useCallback: 3,65 useImperativeHandle: 5,66 useEffect: 10,67 useRef: 1,68 useLayoutEffect: 769 }70 },71 {72 image: '/​color/​pink.jpg',73 id: 5,74 points: {75 useState: 3,76 useReducer: 4,77 useCallback: 3,78 useImperativeHandle: 9,79 useEffect: 6,80 useRef: 10,81 useLayoutEffect: 482 }83 },84 {85 image: '/​color/​purple.jpg',86 id: 6,87 points: {88 useState: 1,89 useReducer: 6,90 useCallback: 5,91 useImperativeHandle: 2,92 useEffect: 5,93 useRef: 5,94 useLayoutEffect: 1095 }96 },97 {98 image: '/​color/​red.jpg',99 id: 7,100 points: {101 useState: 8,102 useReducer: 5,103 useCallback: 1,104 useImperativeHandle: 3,105 useEffect: 9,106 useRef: 8,107 useLayoutEffect: 7108 }109 },110 {111 image: '/​color/​yellow.jpg',112 id: 8,113 points: {114 useState: 3,115 useReducer: 9,116 useCallback: 5,117 useImperativeHandle: 3,118 useEffect: 1,119 useRef: 1,120 useLayoutEffect: 4121 }122 }123 ]124 },125 {126 question: 'Выбери фильм',127 type: 'withImage',128 options: [129 {130 image: '/​movie/​brother.png',131 text: '"Брат"',132 id: 0,133 points: {134 useState: 10,135 useReducer: 5,136 useCallback: 2,137 useImperativeHandle: 6,138 useEffect: 6,139 useRef: 7,140 useLayoutEffect: 3141 }142 },143 {144 image: '/​movie/​zhmurki.png',145 text: '"Жмурки"',146 id: 1,147 points: {148 useState: 4,149 useReducer: 10,150 useCallback: 5,151 useImperativeHandle: 5,152 useEffect: 4,153 useRef: 4,154 useLayoutEffect: 3155 }156 },157 {158 image: '/​movie/​indiana.png',159 text: '"Индиана Джонс и последний крестовый поход"',160 id: 2,161 points: {162 useState: 5,163 useReducer: 4,164 useCallback: 10,165 useImperativeHandle: 4,166 useEffect: 3,167 useRef: 4,168 useLayoutEffect: 4169 }170 },171 {172 image: '/​movie/​godfather.png',173 text: '"Крестный отец"',174 id: 3,175 points: {176 useState: 3,177 useReducer: 1,178 useCallback: 8,179 useImperativeHandle: 10,180 useEffect: 3,181 useRef: 6,182 useLayoutEffect: 1183 }184 },185 {186 image: '/​movie/​beauty.png',187 text: '"Красотка"',188 id: 4,189 points: {190 useState: 1,191 useReducer: 7,192 useCallback: 3,193 useImperativeHandle: 5,194 useEffect: 10,195 useRef: 8,196 useLayoutEffect: 7197 }198 },199 {200 image: '/​movie/​avengers.png',201 text: '"Мстители: финал"',202 id: 5,203 points: {204 useState: 3,205 useReducer: 4,206 useCallback: 7,207 useImperativeHandle: 9,208 useEffect: 6,209 useRef: 10,210 useLayoutEffect: 3211 }212 },213 {214 image: '/​movie/​revenant.png',215 text: '"Выживший"',216 id: 6,217 points: {218 useState: 1,219 useReducer: 6,220 useCallback: 5,221 useImperativeHandle: 2,222 useEffect: 5,223 useRef: 5,224 useLayoutEffect: 10225 }226 },227 {228 image: '/​movie/​nocountry.png',229 text: '"Старикам здесь не место"',230 id: 7,231 points: {232 useState: 8,233 useReducer: 5,234 useCallback: 6,235 useImperativeHandle: 9,236 useEffect: 7,237 useRef: 8,238 useLayoutEffect: 7239 }240 },241 {242 image: '/​movie/​animals.png',243 text: '"Тайная жизнь домашних животных 2"',244 id: 8,245 points: {246 useState: 3,247 useReducer: 3,248 useCallback: 5,249 useImperativeHandle: 3,250 useEffect: 8,251 useRef: 7,252 useLayoutEffect: 4253 }254 }255 ]256 },257 {258 question: 'Выбери песню',259 type: 'withImage',260 options: [261 {262 image: '/​song/​despacito.png',263 text: 'Luis Fonsi: "Despacito"',264 id: 0,265 points: {266 useState: 6,267 useReducer: 5,268 useCallback: 6,269 useImperativeHandle: 6,270 useEffect: 5,271 useRef: 7,272 useLayoutEffect: 10273 }274 },275 {276 image: '/​song/​adele.png',277 text: 'Adele: "Rolling in the deep"',278 id: 1,279 points: {280 useState: 4,281 useReducer: 4,282 useCallback: 6,283 useImperativeHandle: 5,284 useEffect: 5,285 useRef: 10,286 useLayoutEffect: 3287 }288 },289 {290 image: '/​song/​beegees.png',291 text: 'Bee Gees: "How deep is your love"',292 id: 2,293 points: {294 useState: 5,295 useReducer: 4,296 useCallback: 7,297 useImperativeHandle: 4,298 useEffect: 10,299 useRef: 6,300 useLayoutEffect: 4301 }302 },303 {304 image: '/​song/​hellsbells.png',305 text: 'AC/​DC: "Hells bells"',306 id: 3,307 points: {308 useState: 3,309 useReducer: 1,310 useCallback: 8,311 useImperativeHandle: 10,312 useEffect: 3,313 useRef: 5,314 useLayoutEffect: 1315 }316 },317 {318 image: '/​song/​survivor.png',319 text: 'Survivor: "Eye of the tiger"',320 id: 4,321 points: {322 useState: 1,323 useReducer: 5,324 useCallback: 10,325 useImperativeHandle: 5,326 useEffect: 2,327 useRef: 1,328 useLayoutEffect: 7329 }330 },331 {332 image: '/​song/​gaye.png',333 text: 'Marvin Gaye: "Lets get it on"',334 id: 5,335 points: {336 useState: 3,337 useReducer: 10,338 useCallback: 7,339 useImperativeHandle: 6,340 useEffect: 6,341 useRef: 1,342 useLayoutEffect: 6343 }344 },345 {346 image: '/​song/​pharell.png',347 text: 'Pharell Williams: "Happy"',348 id: 6,349 points: {350 useState: 10,351 useReducer: 6,352 useCallback: 5,353 useImperativeHandle: 2,354 useEffect: 5,355 useRef: 5,356 useLayoutEffect: 1357 }358 },359 {360 image: '/​song/​shortpairs.png',361 text: 'Shortparis: "Страшно"',362 id: 7,363 points: {364 useState: 8,365 useReducer: 5,366 useCallback: 1,367 useImperativeHandle: 3,368 useEffect: 9,369 useRef: 8,370 useLayoutEffect: 7371 }372 },373 {374 image: '/​song/​arctic.png',375 text: 'Arctic Monkeys: "Four out of five"',376 id: 8,377 points: {378 useState: 3,379 useReducer: 9,380 useCallback: 5,381 useImperativeHandle: 3,382 useEffect: 1,383 useRef: 1,384 useLayoutEffect: 4385 }386 }387 ]388 },389 {390 question: 'Где ты в пятницу вечером?',391 type: 'text',392 options: [393 {394 text: 'Со своей второй половинкой',395 id: 2,396 points: {397 useState: 5,398 useReducer: 4,399 useCallback: 10,400 useImperativeHandle: 4,401 useEffect: 3,402 useRef: 4,403 useLayoutEffect: 4404 }405 },406 {407 text: 'Бухаю с друзьями',408 id: 3,409 points: {410 useState: 3,411 useReducer: 1,412 useCallback: 5,413 useImperativeHandle: 10,414 useEffect: 3,415 useRef: 4,416 useLayoutEffect: 1417 }418 },419 {420 text: 'На свиданке',421 id: 0,422 points: {423 useState: 10,424 useReducer: 5,425 useCallback: 8,426 useImperativeHandle: 6,427 useEffect: 7,428 useRef: 7,429 useLayoutEffect: 3430 }431 },432 {433 text: 'Сплю',434 id: 4,435 points: {436 useState: 1,437 useReducer: 8,438 useCallback: 5,439 useImperativeHandle: 5,440 useEffect: 10,441 useRef: 1,442 useLayoutEffect: 7443 }444 },445 {446 text: 'Тусуюсь в клубе',447 id: 5,448 points: {449 useState: 3,450 useReducer: 4,451 useCallback: 7,452 useImperativeHandle: 9,453 useEffect: 6,454 useRef: 10,455 useLayoutEffect: 8456 }457 },458 {459 text: 'Смотрю кино дома',460 id: 6,461 points: {462 useState: 1,463 useReducer: 6,464 useCallback: 5,465 useImperativeHandle: 2,466 useEffect: 5,467 useRef: 5,468 useLayoutEffect: 10469 }470 },471 {472 text: 'Думаю о бывшей',473 id: 1,474 points: {475 useState: 4,476 useReducer: 10,477 useCallback: 1,478 useImperativeHandle: 5,479 useEffect: 5,480 useRef: 4,481 useLayoutEffect: 3482 }483 },484 {485 text: 'Играю в настолки',486 id: 7,487 points: {488 useState: 8,489 useReducer: 5,490 useCallback: 1,491 useImperativeHandle: 3,492 useEffect: 9,493 useRef: 8,494 useLayoutEffect: 7495 }496 }497 ]498 },499 {500 question: 'Выбери суперспособность',501 type: 'text',502 options: [503 {504 text: 'Невидимость',505 id: 0,506 points: {507 useState: 10,508 useReducer: 5,509 useCallback: 8,510 useImperativeHandle: 6,511 useEffect: 7,512 useRef: 7,513 useLayoutEffect: 3514 }515 },516 {517 text: 'Путешествие во времени',518 id: 1,519 points: {520 useState: 4,521 useReducer: 10,522 useCallback: 6,523 useImperativeHandle: 5,524 useEffect: 3,525 useRef: 4,526 useLayoutEffect: 3527 }528 },529 {530 text: 'Писать популярные твиты',531 id: 2,532 points: {533 useState: 4,534 useReducer: 4,535 useCallback: 10,536 useImperativeHandle: 4,537 useEffect: 3,538 useRef: 5,539 useLayoutEffect: 4540 }541 },542 {543 text: 'Суперсила',544 id: 3,545 points: {546 useState: 3,547 useReducer: 1,548 useCallback: 8,549 useImperativeHandle: 10,550 useEffect: 3,551 useRef: 4,552 useLayoutEffect: 1553 }554 },555 {556 text: 'Супертолератность',557 id: 4,558 points: {559 useState: 1,560 useReducer: 3,561 useCallback: 4,562 useImperativeHandle: 5,563 useEffect: 10,564 useRef: 1,565 useLayoutEffect: 7566 }567 },568 {569 text: 'Телепортация',570 id: 5,571 points: {572 useState: 3,573 useReducer: 4,574 useCallback: 7,575 useImperativeHandle: 3,576 useEffect: 6,577 useRef: 10,578 useLayoutEffect: 4579 }580 },581 {582 text: 'Читать мысли',583 id: 6,584 points: {585 useState: 1,586 useReducer: 6,587 useCallback: 5,588 useImperativeHandle: 2,589 useEffect: 5,590 useRef: 5,591 useLayoutEffect: 10592 }593 },594 {595 text: 'Дышать под водой',596 id: 7,597 points: {598 useState: 8,599 useReducer: 5,600 useCallback: 1,601 useImperativeHandle: 3,602 useEffect: 9,603 useRef: 8,604 useLayoutEffect: 7605 }606 }607 ]608 }609]610export const hooks = {611 useState: {612 description: 'Ты useState!',613 text: 'Возвращает значение с состоянием и функцию для его обновления.',614 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#usestate'615 },616 useReducer: {617 description: 'Ты useReducer!',618 text:619 'Альтернатива для useState. Принимает редюсер типа (state, action) => newState и возвращает текущее состояние в паре с методом dispatch. (Если вы знакомы с Redux, вы уже знаете, как это работает.)',620 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#usereducer'621 },622 useCallback: {623 description: 'Ты useCallback!',624 text: 'Возвращает мемоизированный колбэк.',625 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#usecallback'626 },627 useImperativeHandle: {628 description: 'Ты useImperativeHandle!',629 text:630 'useImperativeHandle настраивает значение экземпляра, которое предоставляется родительским компонентам при использовании ref. Как всегда, в большинстве случаев следует избегать императивного кода, использующего ссылки. useImperativeHandle должен использоваться с forwardRef:',631 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#useimperativehandle'632 },633 useEffect: {634 description: 'Ты useEffect!',635 text:636 'Принимает функцию, которая содержит императивный код, возможно, с эффектами.',637 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#useeffect'638 },639 useRef: {640 description: 'Ты useRef!',641 text:642 'useRef возвращает изменяемый ref-объект, свойство .current которого инициализируется переданным аргументом (initialValue). Возвращённый объект будет сохраняться в течение всего времени жизни компонента.',643 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#useref'644 },645 useLayoutEffect: {646 description: 'Ты useLayoutEffect!',647 text:648 'Сигнатура идентична useEffect, но этот хук запускается синхронно после всех изменений DOM. Используйте его для чтения макета из DOM и синхронного повторного рендеринга. Обновления, запланированные внутри useLayoutEffect, будут полностью применены синхронно перед тем, как браузер получит шанс осуществить отрисовку.',649 link: 'https:/​/​reactjs.org/​docs/​hooks-reference.html#uselayouteffect'650 }...

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useImperativeHandle.test.js

Source:useImperativeHandle.test.js Github

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...18 it('Mutates given ref', () => {19 let ref;20 function Comp() {21 ref = useRef({});22 useImperativeHandle(ref, () => ({ test: () => 'test' }), []);23 return <p>Test</​p>;24 }25 render(<Comp /​>, scratch);26 expect(ref.current).to.have.property('test');27 expect(ref.current.test()).to.equal('test');28 });29 it('calls createHandle after every render by default', () => {30 let ref,31 createHandleSpy = sinon.spy();32 function Comp() {33 ref = useRef({});34 useImperativeHandle(ref, createHandleSpy);35 return <p>Test</​p>;36 }37 render(<Comp /​>, scratch);38 expect(createHandleSpy).to.have.been.calledOnce;39 render(<Comp /​>, scratch);40 expect(createHandleSpy).to.have.been.calledTwice;41 render(<Comp /​>, scratch);42 expect(createHandleSpy).to.have.been.calledThrice;43 });44 it('calls createHandle only on mount if an empty array is passed', () => {45 let ref,46 createHandleSpy = sinon.spy();47 function Comp() {48 ref = useRef({});49 useImperativeHandle(ref, createHandleSpy, []);50 return <p>Test</​p>;51 }52 render(<Comp /​>, scratch);53 expect(createHandleSpy).to.have.been.calledOnce;54 render(<Comp /​>, scratch);55 expect(createHandleSpy).to.have.been.calledOnce;56 });57 it('Updates given ref when args change', () => {58 let ref,59 createHandleSpy = sinon.spy();60 function Comp({ a }) {61 ref = useRef({});62 useImperativeHandle(63 ref,64 () => {65 createHandleSpy();66 return { test: () => 'test' + a };67 },68 [a]69 );70 return <p>Test</​p>;71 }72 render(<Comp a={0} /​>, scratch);73 expect(createHandleSpy).to.have.been.calledOnce;74 expect(ref.current).to.have.property('test');75 expect(ref.current.test()).to.equal('test0');76 render(<Comp a={1} /​>, scratch);77 expect(createHandleSpy).to.have.been.calledTwice;78 expect(ref.current).to.have.property('test');79 expect(ref.current.test()).to.equal('test1');80 render(<Comp a={0} /​>, scratch);81 expect(createHandleSpy).to.have.been.calledThrice;82 expect(ref.current).to.have.property('test');83 expect(ref.current.test()).to.equal('test0');84 });85 it('Updates given ref when passed-in ref changes', () => {86 let ref1, ref2;87 /​** @type {(arg: any) => void} */​88 let setRef;89 /​** @type {() => void} */​90 let updateState;91 const createHandleSpy = sinon.spy(() => ({92 test: () => 'test'93 }));94 function Comp() {95 ref1 = useRef({});96 ref2 = useRef({});97 const [ref, setRefInternal] = useState(ref1);98 setRef = setRefInternal;99 let [value, setState] = useState(0);100 updateState = () => setState((value + 1) % 2);101 useImperativeHandle(ref, createHandleSpy, []);102 return <p>Test</​p>;103 }104 render(<Comp a={0} /​>, scratch);105 expect(createHandleSpy).to.have.been.calledOnce;106 updateState();107 rerender();108 expect(createHandleSpy).to.have.been.calledOnce;109 setRef(ref2);110 rerender();111 expect(createHandleSpy).to.have.been.calledTwice;112 updateState();113 rerender();114 expect(createHandleSpy).to.have.been.calledTwice;115 setRef(ref1);116 rerender();117 expect(createHandleSpy).to.have.been.calledThrice;118 });119 it('should not update ref when args have not changed', () => {120 let ref,121 createHandleSpy = sinon.spy(() => ({ test: () => 'test' }));122 function Comp() {123 ref = useRef({});124 useImperativeHandle(ref, createHandleSpy, [1]);125 return <p>Test</​p>;126 }127 render(<Comp /​>, scratch);128 expect(createHandleSpy).to.have.been.calledOnce;129 expect(ref.current.test()).to.equal('test');130 render(<Comp /​>, scratch);131 expect(createHandleSpy).to.have.been.calledOnce;132 expect(ref.current.test()).to.equal('test');133 });134 it('should not throw with nullish ref', () => {135 function Comp() {136 useImperativeHandle(null, () => ({ test: () => 'test' }), [1]);137 return <p>Test</​p>;138 }139 expect(() => render(<Comp /​>, scratch)).to.not.throw();140 });...

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useImperativeHandle.js

Source:useImperativeHandle.js Github

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...10 * 2. 参数1: 父组件传递的ref属性11 * 3. 参数2: 返回一个对象, 以供给父组件中通过ref.current调用该对象中的方法12 * @type {React.ForwardRefExoticComponent<React.PropsWithoutRef<{}> & React.RefAttributes<unknown>>}13 */​14/​/​ function useImperativeHandle(ref,factory){15/​/​ ref.current = factory()16/​/​ }17const JMInput = forwardRef((props, ref) => {18 const inputRef = useRef()19 /​/​ 作用: 减少父组件获取的DOM元素属性,只暴露给父组件需要用到的DOM方法20 /​/​ 参数1: 父组件传递的ref属性21 /​/​ 参数2: 返回一个对象,父组件通过ref.current调用对象中方法22 /​/​ useImperativeHandle 命令式处理器23 useImperativeHandle(ref, () => ({24 focus: () => {25 inputRef.current.focus()26 },27 }))28 return <input type="text" ref={inputRef} /​>29})30export default function ImperativeHandleDemo() {31 /​/​ useImperativeHandle 主要作用:用于减少父组件中通过forward+useRef获取子组件DOM元素暴露的属性过多32 /​/​ 为什么使用: 因为使用forward+useRef获取子函数式组件DOM时,获取到的dom属性暴露的太多了33 /​/​ 解决: 使用uesImperativeHandle解决,在子函数式组件中定义父组件需要进行DOM操作,减少获取DOM暴露的属性过多34 const inputRef = useRef()35 /​/​ inputRef 其实就是我们返回的那个对象 {focus}36 return (37 <div>...

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5-28.js

Source:5-28.js Github

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...13*/​14function Profile(props, ref) {15 const [name, setName] = useState("");16 const [age, setAge] = useState(0);17 useImperativeHandle(ref, () => ({18 addAge: (value) => setAge(age + value),19 getNameLength: () => name.length,20 }));21 return (22 <div>23 <h1> Child Component </​h1>24 <div>25 <h2> 설명 </​h2>26 <p> # 코드 5-28 부모 컴포넌트에서 접근 가능한 함수를 구현하기</​p>27 <p> * 코드 5-29 부모 컴포넌트에서 호출될 자식 컴포넌트</​p>28 <p> * 부모 컴포넌트에서 접근 가능한 함수를 구현 방법</​p>29 <p>30 {" "}31 <label> -- useImperativeHandle 훅에 두개 매개변수 지정</​label>...

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hooks_useRef_useImperativeHandle转发.js

Source:hooks_useRef_useImperativeHandle转发.js Github

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...35 const button2Ref = useRef();3637 /​/​ useImperativeHandle定义回调函数，后面一个函数的返回对象会赋给ref上，也就是这里的 fancyInoutRef ，38 /​/​ 外部就可以直接通过 fancyInoutRef.current.getBtn1Width 拿到对象里的函数来使用39 useImperativeHandle(ref, () => ({40 getBtn1Width: () => {41 return button1Ref.current.offsetWidth;42 },43 getBtn2Width: () => {44 return button2Ref.current.offsetWidth;45 }46 }));47 return (48 <>49 <button ref={button1Ref} onClick={props.onClick1}>获取按钮的宽度11</​button>50 <button ref={button2Ref} onClick={props.onClick2}>获取按钮的宽度2222</​button>51 </​>52 )53} ...

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ImperativeHandle.js

Source:ImperativeHandle.js Github

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...7/​/​ eslint-disable-next-line8const Input = forwardRef(9 ({ hasError, placeholder, value, handleChange }, ref) => {10 const inputRef = useRef(null);11 useImperativeHandle(ref, () => {12 return {13 focus: () => inputRef.current.focus(),14 };15 });16 return (17 <input18 type="text"19 value={value}20 placeholder={placeholder}21 onChange={(e) => handleChange(e.target.value)}22 ref={inputRef}23 style={{24 border: `1px solid ${hasError ? "red" : "black"}`,25 }}...

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use-imperative-handle.jsx

Source:use-imperative-handle.jsx Github

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1/​**2 * useImperativeHandle(ref, createHandle, [deps])3 */​4import { useImperativeHandle, forwardRef, useRef, useState } from 'react'5import { Typography, Button, Input } from 'antd'6const { Title } = Typography7function UseImperativeHandle() {8 const el = useRef(null)9 return (10 <>11 <Title>useImperativeHandle</​Title>12 <Child ref={el}/​>13 <Button onClick={() => {14 el.current.focus()15 console.log(el, 'el')16 }}>获取子元素DOM节点</​Button>17 </​>18 )19}20const Child = forwardRef((props, ref) => {21 const [count, setCount] = useState(0)22 const [num, setNum] = useState(100)23 const inputRef = useRef(null)24 const spanEl = useRef(null)25 /​/​ 1.forwardRef26 useImperativeHandle(ref, () => ({27 value: '123',28 focus: () => {29 inputRef.current.focus()30 },31 spanEl,32 count,33 num34 /​/​ 第三个参数 监控某个值变化的时候 才会把新的结果传给父组件35 /​/​ eslint-disable-next-line react-hooks/​exhaustive-deps36 }), [num])37 return (38 <>39 {/​*index.js:1 Warning: Function components cannot be given refs. Attempts to access this ref will fail. Did you mean to use React.forwardRef()?*/​}40 {/​*<Title ref={ref} level={3}>123</​Title>*/​}...

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hooks-useImperativeHandle.js

Source:hooks-useImperativeHandle.js Github

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...4_e = $RefreshSig$();5/​/​ ? should generate signature for built-in hooks6function ImperativeHandle(props, ref) {7 _d();8 const v = useImperativeHandle(ref, () => ({ a }));9}10_a = ImperativeHandle;11$RefreshReg$(_a, "ImperativeHandle");12_d(ImperativeHandle, "useImperativeHandle{v}");13ImperativeHandle = forwardRef(ImperativeHandle);14const HOC = forwardRef(_b = _e(function (props, ref) {15 _e();16 const v = useImperativeHandle(ref, () => ({ a }));17}, "useImperativeHandle{v}"));18$RefreshReg$(_b, "HOC$forwardRef");19_c = HOC;...

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { useImperativeHandle } = require('playwright/​lib/​client/​api');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const internalHandle = await page.evaluateHandle(() => window);7 const internalHandle2 = await useImperativeHandle(internalHandle);8 console.log(internalHandle2);9 await browser.close();10})();11const { chromium } = require('playwright');12const { useImperativeHandle } = require('playwright/​lib/​client/​api');13(async () => {14 const browser = await chromium.launch();15 const page = await browser.newPage();16 const internalHandle = await useImperativeHandle(page);17 console.log(internalHandle);18 await browser.close();19})();20const { chromium } = require('playwright');21const { useImperativeHandle } = require('playwright/​lib/​client/​api');22(async () => {23 const browser = await chromium.launch();24 const page = await browser.newPage();25 const internalHandle = await useImperativeHandle(page.mainFrame());26 console.log(internalHandle);27 await browser.close();28})();

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Using AI Code Generation

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1const { useImperativeHandle } = require('playwright/​lib/​server/​dom');2const { useImperativeHandle } = require('playwright/​lib/​server/​dom');3const { useImperativeHandle } = require('playwright/​lib/​server/​dom');4const { useImperativeHandle } = require('playwright/​lib/​server/​dom');5const { useImperativeHandle } = require('playwright/​lib/​server/​dom');6const { useImperativeHandle } = require('playwright/​lib/​server/​dom');7const { useImperativeHandle } = require('playwright/​lib/​server/​dom');8const { useImperativeHandle } = require('playwright/​lib/​server/​dom');9const { useImperativeHandle } = require('playwright/​lib/​server/​dom');10const { useImperativeHandle } = require('playwright/​lib/​server/​dom');11const { useImperativeHandle } = require('playwright/​lib/​server/​dom');12const { useImperativeHandle } = require('playwright/​lib/​server/​dom');13const { useImperativeHandle } = require('playwright/​lib/​server/​dom');14const { useImperativeHandle } = require('playwright/​lib/​server/​dom');15const { useImperativeHandle } = require('playwright/​lib/​server/​dom');16const {

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Using AI Code Generation

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1const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');2const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');3const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');4const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');5const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');6const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');7const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');8const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');9const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');10const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');11const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');12const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');13const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');14const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');15const { useImperativeHandle } = require('playwright-core/​lib/​server/​frames');

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { useImperativeHandle } = require('playwright/​lib/​server/​supplements/​handlers/​handler');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const frame = page.mainFrame();8 const elementHandle = await frame.$('text=Get started');9 const element = await elementHandle.asElement();10 const internalHandler = await useImperativeHandle(element);11 const internalElement = await internalHandler._elementPromise;12 console.log(internalElement);13 await browser.close();14})();15ElementHandle {16 _elementPromise: Promise { <pending> },17 _context: BrowserContext {18 _browser: Browser {19 _connection: Connection {20 _events: [Object: null prototype] {},21 },22 _options: {23 },

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Using AI Code Generation

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1const {chromium} = require('playwright');2const {useImperativeHandle} = require('playwright/​lib/​server/​injected/​injectedScript');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.screenshot({ path: 'example.png' });8 await browser.close();9})();

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Using AI Code Generation

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1import { chromium, firefox, webkit } from 'playwright';2import { useImperativeHandle } from 'playwright-core/​lib/​server/​chromium/​crBrowser';3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const video = await page.$('video');7 await video.useImperativeHandle();8 await browser.close();9})();10 at Browser.useImperativeHandle (C:\Users\mohit\Documents\Playwright\playwright-core\lib\server\chromium\crBrowser.js:58:19)11 at processTicksAndRejections (internal/​process/​task_queues.js:97:5)12 at async Object.<anonymous> (C:\Users\mohit\Documents\Playwright\test.js:10:5)

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1const { useImperativeHandle } = require('playwright/​lib/​client/​selectorEngine');2const { Selector } = require('playwright');3useImperativeHandle('selector', (selector, action) => {4 if (action === 'query') {5 return selector;6 }7 if (action === 'queryAll') {8 return [selector];9 }10 throw new Error(`Unknown action "${action}"`);11});12(async () => {13 const browser = await chromium.launch({ headless: false });14 const context = await browser.newContext();15 const page = await context.newPage();16 const selector = await Selector('input').addCustomMethods({17 async fill(page, text) {18 await page.fill(this, text);19 },20 });21 await selector.fill(page, 'Hello, World!');22 await browser.close();23})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 const internalPage = page._delegate;6 const internalBrowser = browser._delegate;7 const internalBrowserContext = internalBrowser._defaultContext;8 const internalBrowserContextController = internalBrowserContext._browserContextController;9 const internalBrowserContextControllerPage = internalBrowserContextController._page;10 const internalBrowserContextControllerPageFrame = internalBrowserContextControllerPage.mainFrame();11 const internalBrowserContextControllerPageFrameSession = internalBrowserContextControllerPageFrame._session;12 const internalBrowserContextControllerPageFrameSessionConnection = internalBrowserContextControllerPageFrameSession._connection;13 const internalBrowserContextControllerPageFrameSessionConnectionTransport = internalBrowserContextControllerPageFrameSessionConnection._transport;14 const internalBrowserContextControllerPageFrameSessionConnectionTransportWebSocket = internalBrowserContextControllerPageFrameSessionConnectionTransport._ws;15 const internalBrowserContextControllerPageFrameSessionConnectionTransportWebSocketUrl = internalBrowserContextControllerPageFrameSessionConnectionTransportWebSocket._url;16 console.log(internalBrowserContextControllerPageFrameSessionConnectionTransportWebSocketUrl);17 await browser.close();18})();19const { chromium } = require('playwright');20(async () => {21 const browser = await chromium.launch();22 const page = await browser.newPage();23 const internalPage = page._delegate;24 const internalBrowser = browser._delegate;25 const internalBrowserContext = internalBrowser._defaultContext;26 const internalBrowserContextController = internalBrowserContext._browserContextController;27 const internalBrowserContextControllerPage = internalBrowserContextController._page;28 const internalBrowserContextControllerPageFrame = internalBrowserContextControllerPage.mainFrame();29 const internalBrowserContextControllerPageFrameSession = internalBrowserContextControllerPageFrame._session;30 const internalBrowserContextControllerPageFrameSessionConnection = internalBrowserContextControllerPageFrameSession._connection;31 const internalBrowserContextControllerPageFrameSessionConnectionTransport = internalBrowserContextControllerPageFrameSessionConnection._transport;

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { useImperativeHandle } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement');3(async () => {4 const browser = await chromium.launch({headless: false});5 const context = await browser.newContext();6 const page = await context.newPage();7 const pageObject = useImperativeHandle(page);8 console.log(pageObject);9 await browser.close();10})();11Page {12 _browserContext: BrowserContext {13 _options: {14 _recordVideoSize: { width: 1280, height: 720 },15 _timeoutSettings: TimeoutSettings { _defaultTimeout: 30000 },16 _env: {},

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Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

  1. What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
  2. How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
  3. Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
  4. What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
  5. Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
  6. Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
  7. Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
  8. Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
  9. Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
  10. Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
  11. Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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