| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @emails react-core |
| 8 | */ |
| 9 | |
| 10 | 'use strict'; |
| 11 | |
| 12 | let React; |
| 13 | let Scheduler; |
| 14 | // let ReactCache; |
| 15 | let ReactDOM; |
| 16 | let ReactDOMClient; |
| 17 | // let Suspense; |
| 18 | let originalCreateElement; |
| 19 | // let TextResource; |
| 20 | // let textResourceShouldFail; |
| 21 | let originalHTMLImageElementSrcDescriptor; |
| 22 | |
| 23 | let images = []; |
| 24 | let onLoadSpy = null; |
| 25 | let actualLoadSpy = null; |
| 26 | |
| 27 | let waitForAll; |
| 28 | let waitFor; |
| 29 | let assertLog; |
| 30 | |
| 31 | function PhaseMarkers({children}) { |
| 32 | Scheduler.log('render start'); |
| 33 | React.useLayoutEffect(() => { |
| 34 | Scheduler.log('last layout'); |
| 35 | }); |
| 36 | React.useEffect(() => { |
| 37 | Scheduler.log('last passive'); |
| 38 | }); |
| 39 | return children; |
| 40 | } |
| 41 | |
| 42 | function last(arr) { |
| 43 | if (Array.isArray(arr)) { |
| 44 | if (arr.length) { |
| 45 | return arr[arr.length - 1]; |
| 46 | } |
| 47 | return undefined; |
| 48 | } |
| 49 | throw new Error('last was passed something that was not an array'); |
| 50 | } |
| 51 | |
| 52 | function Text(props) { |
| 53 | Scheduler.log(props.text); |
| 54 | return props.text; |
| 55 | } |
| 56 | |
| 57 | // function AsyncText(props) { |
| 58 | // const text = props.text; |
| 59 | // try { |
| 60 | // TextResource.read([props.text, props.ms]); |
| 61 | // Scheduler.log(text); |
| 62 | // return text; |
| 63 | // } catch (promise) { |
| 64 | // if (typeof promise.then === 'function') { |
| 65 | // Scheduler.log(`Suspend! [${text}]`); |
| 66 | // } else { |
| 67 | // Scheduler.log(`Error! [${text}]`); |
| 68 | // } |
| 69 | // throw promise; |
| 70 | // } |
| 71 | // } |
| 72 | |
| 73 | function Img({src: maybeSrc, onLoad, useImageLoader, ref}) { |
| 74 | const src = maybeSrc || 'default'; |
| 75 | Scheduler.log('Img ' + src); |
| 76 | return <img src={src} onLoad={onLoad} />; |
| 77 | } |
| 78 | |
| 79 | function Yield() { |
| 80 | Scheduler.log('Yield'); |
| 81 | Scheduler.unstable_requestPaint(); |
| 82 | return null; |
| 83 | } |
| 84 | |
| 85 | function loadImage(element) { |
| 86 | const event = new Event('load'); |
| 87 | element.__needsDispatch = false; |
| 88 | element.dispatchEvent(event); |
| 89 | } |
| 90 | |
| 91 | describe('ReactDOMImageLoad', () => { |
| 92 | beforeEach(() => { |
| 93 | jest.resetModules(); |
| 94 | React = require('react'); |
| 95 | Scheduler = require('scheduler'); |
| 96 | // ReactCache = require('react-cache'); |
| 97 | ReactDOM = require('react-dom'); |
| 98 | ReactDOMClient = require('react-dom/client'); |
| 99 | // Suspense = React.Suspense; |
| 100 | |
| 101 | const InternalTestUtils = require('internal-test-utils'); |
| 102 | waitForAll = InternalTestUtils.waitForAll; |
| 103 | waitFor = InternalTestUtils.waitFor; |
| 104 | assertLog = InternalTestUtils.assertLog; |
| 105 | |
| 106 | onLoadSpy = jest.fn(reactEvent => { |
| 107 | const src = reactEvent.target.getAttribute('src'); |
| 108 | Scheduler.log('onLoadSpy [' + src + ']'); |
| 109 | }); |
| 110 | |
| 111 | actualLoadSpy = jest.fn(nativeEvent => { |
| 112 | const src = nativeEvent.target.getAttribute('src'); |
| 113 | Scheduler.log('actualLoadSpy [' + src + ']'); |
| 114 | nativeEvent.__originalDispatch = false; |
| 115 | }); |
| 116 | |
| 117 | // TextResource = ReactCache.unstable_createResource( |
| 118 | // ([text, ms = 0]) => { |
| 119 | // let listeners = null; |
| 120 | // let status = 'pending'; |
| 121 | // let value = null; |
| 122 | // return { |
| 123 | // then(resolve, reject) { |
| 124 | // switch (status) { |
| 125 | // case 'pending': { |
| 126 | // if (listeners === null) { |
| 127 | // listeners = [{resolve, reject}]; |
| 128 | // setTimeout(() => { |
| 129 | // if (textResourceShouldFail) { |
| 130 | // Scheduler.log( |
| 131 | // `Promise rejected [${text}]`, |
| 132 | // ); |
| 133 | // status = 'rejected'; |
| 134 | // value = new Error('Failed to load: ' + text); |
| 135 | // listeners.forEach(listener => listener.reject(value)); |
| 136 | // } else { |
| 137 | // Scheduler.log( |
| 138 | // `Promise resolved [${text}]`, |
| 139 | // ); |
| 140 | // status = 'resolved'; |
| 141 | // value = text; |
| 142 | // listeners.forEach(listener => listener.resolve(value)); |
| 143 | // } |
| 144 | // }, ms); |
| 145 | // } else { |
| 146 | // listeners.push({resolve, reject}); |
| 147 | // } |
| 148 | // break; |
| 149 | // } |
| 150 | // case 'resolved': { |
| 151 | // resolve(value); |
| 152 | // break; |
| 153 | // } |
| 154 | // case 'rejected': { |
| 155 | // reject(value); |
| 156 | // break; |
| 157 | // } |
| 158 | // } |
| 159 | // }, |
| 160 | // }; |
| 161 | // }, |
| 162 | // ([text, ms]) => text, |
| 163 | // ); |
| 164 | // textResourceShouldFail = false; |
| 165 | |
| 166 | images = []; |
| 167 | |
| 168 | originalCreateElement = document.createElement; |
| 169 | document.createElement = function createElement(tagName, options) { |
| 170 | const element = originalCreateElement.call(document, tagName, options); |
| 171 | if (tagName === 'img') { |
| 172 | element.addEventListener('load', actualLoadSpy); |
| 173 | images.push(element); |
| 174 | } |
| 175 | return element; |
| 176 | }; |
| 177 | |
| 178 | originalHTMLImageElementSrcDescriptor = Object.getOwnPropertyDescriptor( |
| 179 | HTMLImageElement.prototype, |
| 180 | 'src', |
| 181 | ); |
| 182 | |
| 183 | Object.defineProperty(HTMLImageElement.prototype, 'src', { |
| 184 | get() { |
| 185 | return this.getAttribute('src'); |
| 186 | }, |
| 187 | set(value) { |
| 188 | Scheduler.log('load triggered'); |
| 189 | this.__needsDispatch = true; |
| 190 | this.setAttribute('src', value); |
| 191 | }, |
| 192 | }); |
| 193 | }); |
| 194 | |
| 195 | afterEach(() => { |
| 196 | document.createElement = originalCreateElement; |
| 197 | Object.defineProperty( |
| 198 | HTMLImageElement.prototype, |
| 199 | 'src', |
| 200 | originalHTMLImageElementSrcDescriptor, |
| 201 | ); |
| 202 | }); |
| 203 | |
| 204 | it('captures the load event if it happens before commit phase and replays it between layout and passive effects', async function () { |
| 205 | const container = document.createElement('div'); |
| 206 | const root = ReactDOMClient.createRoot(container); |
| 207 | |
| 208 | React.startTransition(() => |
| 209 | root.render( |
| 210 | <PhaseMarkers> |
| 211 | <Img onLoad={onLoadSpy} /> |
| 212 | <Yield /> |
| 213 | <Text text={'a'} /> |
| 214 | </PhaseMarkers>, |
| 215 | ), |
| 216 | ); |
| 217 | |
| 218 | await waitFor(['render start', 'Img default', 'Yield']); |
| 219 | const img = last(images); |
| 220 | loadImage(img); |
| 221 | assertLog([ |
| 222 | 'actualLoadSpy [default]', |
| 223 | // no onLoadSpy since we have not completed render |
| 224 | ]); |
| 225 | await waitForAll(['a', 'load triggered', 'last layout', 'last passive']); |
| 226 | expect(img.__needsDispatch).toBe(true); |
| 227 | loadImage(img); |
| 228 | assertLog([ |
| 229 | 'actualLoadSpy [default]', // the browser reloading of the image causes this to yield again |
| 230 | 'onLoadSpy [default]', |
| 231 | ]); |
| 232 | expect(onLoadSpy).toHaveBeenCalled(); |
| 233 | }); |
| 234 | |
| 235 | it('captures the load event if it happens after commit phase and replays it', async function () { |
| 236 | const container = document.createElement('div'); |
| 237 | const root = ReactDOMClient.createRoot(container); |
| 238 | |
| 239 | React.startTransition(() => |
| 240 | root.render( |
| 241 | <PhaseMarkers> |
| 242 | <Img onLoad={onLoadSpy} /> |
| 243 | </PhaseMarkers>, |
| 244 | ), |
| 245 | ); |
| 246 | |
| 247 | await waitFor([ |
| 248 | 'render start', |
| 249 | 'Img default', |
| 250 | 'load triggered', |
| 251 | 'last layout', |
| 252 | ]); |
| 253 | Scheduler.unstable_requestPaint(); |
| 254 | const img = last(images); |
| 255 | loadImage(img); |
| 256 | assertLog(['actualLoadSpy [default]', 'onLoadSpy [default]']); |
| 257 | await waitForAll(['last passive']); |
| 258 | expect(img.__needsDispatch).toBe(false); |
| 259 | expect(onLoadSpy).toHaveBeenCalledTimes(1); |
| 260 | }); |
| 261 | |
| 262 | it('replays the last load event when more than one fire before the end of the layout phase completes', async function () { |
| 263 | const container = document.createElement('div'); |
| 264 | const root = ReactDOMClient.createRoot(container); |
| 265 | |
| 266 | function Base() { |
| 267 | const [src, setSrc] = React.useState('a'); |
| 268 | return ( |
| 269 | <PhaseMarkers> |
| 270 | <Img src={src} onLoad={onLoadSpy} /> |
| 271 | <Yield /> |
| 272 | <UpdateSrc setSrc={setSrc} /> |
| 273 | </PhaseMarkers> |
| 274 | ); |
| 275 | } |
| 276 | |
| 277 | function UpdateSrc({setSrc}) { |
| 278 | React.useLayoutEffect(() => { |
| 279 | setSrc('b'); |
| 280 | }, [setSrc]); |
| 281 | return null; |
| 282 | } |
| 283 | |
| 284 | React.startTransition(() => root.render(<Base />)); |
| 285 | |
| 286 | await waitFor(['render start', 'Img a', 'Yield']); |
| 287 | const img = last(images); |
| 288 | loadImage(img); |
| 289 | assertLog(['actualLoadSpy [a]']); |
| 290 | |
| 291 | await waitFor([ |
| 292 | 'load triggered', |
| 293 | 'last layout', |
| 294 | // the update in layout causes a passive effects flush before a sync render |
| 295 | 'last passive', |
| 296 | 'render start', |
| 297 | 'Img b', |
| 298 | 'Yield', |
| 299 | // yield is ignored becasue we are sync rendering |
| 300 | 'last layout', |
| 301 | 'last passive', |
| 302 | ]); |
| 303 | expect(images.length).toBe(1); |
| 304 | loadImage(img); |
| 305 | assertLog(['actualLoadSpy [b]', 'onLoadSpy [b]']); |
| 306 | expect(onLoadSpy).toHaveBeenCalledTimes(1); |
| 307 | }); |
| 308 | |
| 309 | it('replays load events that happen in passive phase after the passive phase.', async function () { |
| 310 | const container = document.createElement('div'); |
| 311 | const root = ReactDOMClient.createRoot(container); |
| 312 | |
| 313 | root.render( |
| 314 | <PhaseMarkers> |
| 315 | <Img onLoad={onLoadSpy} /> |
| 316 | </PhaseMarkers>, |
| 317 | ); |
| 318 | |
| 319 | await waitForAll([ |
| 320 | 'render start', |
| 321 | 'Img default', |
| 322 | 'load triggered', |
| 323 | 'last layout', |
| 324 | 'last passive', |
| 325 | ]); |
| 326 | const img = last(images); |
| 327 | loadImage(img); |
| 328 | assertLog(['actualLoadSpy [default]', 'onLoadSpy [default]']); |
| 329 | expect(onLoadSpy).toHaveBeenCalledTimes(1); |
| 330 | }); |
| 331 | |
| 332 | it('captures and suppresses the load event if it happens before passive effects and a cascading update causes the img to be removed', async function () { |
| 333 | const container = document.createElement('div'); |
| 334 | const root = ReactDOMClient.createRoot(container); |
| 335 | |
| 336 | function ChildSuppressing({children}) { |
| 337 | const [showChildren, update] = React.useState(true); |
| 338 | React.useLayoutEffect(() => { |
| 339 | if (showChildren) { |
| 340 | update(false); |
| 341 | } |
| 342 | }, [showChildren]); |
| 343 | return showChildren ? children : null; |
| 344 | } |
| 345 | |
| 346 | React.startTransition(() => |
| 347 | root.render( |
| 348 | <PhaseMarkers> |
| 349 | <ChildSuppressing> |
| 350 | <Img onLoad={onLoadSpy} /> |
| 351 | <Yield /> |
| 352 | <Text text={'a'} /> |
| 353 | </ChildSuppressing> |
| 354 | </PhaseMarkers>, |
| 355 | ), |
| 356 | ); |
| 357 | |
| 358 | await waitFor(['render start', 'Img default', 'Yield']); |
| 359 | const img = last(images); |
| 360 | loadImage(img); |
| 361 | assertLog(['actualLoadSpy [default]']); |
| 362 | await waitForAll(['a', 'load triggered', 'last layout', 'last passive']); |
| 363 | expect(img.__needsDispatch).toBe(true); |
| 364 | loadImage(img); |
| 365 | // we expect the browser to load the image again but since we are no longer rendering |
| 366 | // the img there will be no onLoad called |
| 367 | assertLog(['actualLoadSpy [default]']); |
| 368 | await waitForAll([]); |
| 369 | expect(onLoadSpy).not.toHaveBeenCalled(); |
| 370 | }); |
| 371 | |
| 372 | it('captures and suppresses the load event if it happens before passive effects and a cascading update causes the img to be removed, alternate', async function () { |
| 373 | const container = document.createElement('div'); |
| 374 | const root = ReactDOMClient.createRoot(container); |
| 375 | |
| 376 | function Switch({children}) { |
| 377 | const [shouldShow, updateShow] = React.useState(true); |
| 378 | return children(shouldShow, updateShow); |
| 379 | } |
| 380 | |
| 381 | function UpdateSwitchInLayout({updateShow}) { |
| 382 | React.useLayoutEffect(() => { |
| 383 | updateShow(false); |
| 384 | }, []); |
| 385 | return null; |
| 386 | } |
| 387 | |
| 388 | React.startTransition(() => |
| 389 | root.render( |
| 390 | <Switch> |
| 391 | {(shouldShow, updateShow) => ( |
| 392 | <PhaseMarkers> |
| 393 | <> |
| 394 | {shouldShow === true ? ( |
| 395 | <> |
| 396 | <Img onLoad={onLoadSpy} /> |
| 397 | <Yield /> |
| 398 | <Text text={'a'} /> |
| 399 | </> |
| 400 | ) : null} |
| 401 | , |
| 402 | <UpdateSwitchInLayout updateShow={updateShow} /> |
| 403 | </> |
| 404 | </PhaseMarkers> |
| 405 | )} |
| 406 | </Switch>, |
| 407 | ), |
| 408 | ); |
| 409 | |
| 410 | await waitFor([ |
| 411 | // initial render |
| 412 | 'render start', |
| 413 | 'Img default', |
| 414 | 'Yield', |
| 415 | ]); |
| 416 | const img = last(images); |
| 417 | loadImage(img); |
| 418 | assertLog(['actualLoadSpy [default]']); |
| 419 | await waitForAll([ |
| 420 | 'a', |
| 421 | 'load triggered', |
| 422 | // img is present at first |
| 423 | 'last layout', |
| 424 | 'last passive', |
| 425 | // sync re-render where the img is suppressed |
| 426 | 'render start', |
| 427 | 'last layout', |
| 428 | 'last passive', |
| 429 | ]); |
| 430 | expect(img.__needsDispatch).toBe(true); |
| 431 | loadImage(img); |
| 432 | // we expect the browser to load the image again but since we are no longer rendering |
| 433 | // the img there will be no onLoad called |
| 434 | assertLog(['actualLoadSpy [default]']); |
| 435 | await waitForAll([]); |
| 436 | expect(onLoadSpy).not.toHaveBeenCalled(); |
| 437 | }); |
| 438 | |
| 439 | // eslint-disable-next-line jest/no-commented-out-tests |
| 440 | // it('captures the load event if it happens in a suspended subtree and replays it between layout and passive effects on resumption', async function() { |
| 441 | // function SuspendingWithImage() { |
| 442 | // Scheduler.log('SuspendingWithImage'); |
| 443 | // return ( |
| 444 | // <Suspense fallback={<Text text="Loading..." />}> |
| 445 | // <AsyncText text="A" ms={100} /> |
| 446 | // <PhaseMarkers> |
| 447 | // <Img onLoad={onLoadSpy} /> |
| 448 | // </PhaseMarkers> |
| 449 | // </Suspense> |
| 450 | // ); |
| 451 | // } |
| 452 | |
| 453 | // const container = document.createElement('div'); |
| 454 | // const root = ReactDOMClient.createRoot(container); |
| 455 | |
| 456 | // React.startTransition(() => root.render(<SuspendingWithImage />)); |
| 457 | |
| 458 | // expect(Scheduler).toFlushAndYield([ |
| 459 | // 'SuspendingWithImage', |
| 460 | // 'Suspend! [A]', |
| 461 | // 'render start', |
| 462 | // 'Img default', |
| 463 | // 'Loading...', |
| 464 | // ]); |
| 465 | // let img = last(images); |
| 466 | // loadImage(img); |
| 467 | // expect(Scheduler).toHaveYielded(['actualLoadSpy [default]']); |
| 468 | // expect(onLoadSpy).not.toHaveBeenCalled(); |
| 469 | |
| 470 | // // Flush some of the time |
| 471 | // jest.advanceTimersByTime(50); |
| 472 | // // Still nothing... |
| 473 | // expect(Scheduler).toFlushWithoutYielding(); |
| 474 | |
| 475 | // // Flush the promise completely |
| 476 | // jest.advanceTimersByTime(50); |
| 477 | // // Renders successfully |
| 478 | // expect(Scheduler).toHaveYielded(['Promise resolved [A]']); |
| 479 | |
| 480 | // expect(Scheduler).toFlushAndYieldThrough([ |
| 481 | // 'A', |
| 482 | // // img was recreated on unsuspended tree causing new load event |
| 483 | // 'render start', |
| 484 | // 'Img default', |
| 485 | // 'last layout', |
| 486 | // ]); |
| 487 | |
| 488 | // expect(images.length).toBe(2); |
| 489 | // img = last(images); |
| 490 | // expect(img.__needsDispatch).toBe(true); |
| 491 | // loadImage(img); |
| 492 | // expect(Scheduler).toHaveYielded([ |
| 493 | // 'actualLoadSpy [default]', |
| 494 | // 'onLoadSpy [default]', |
| 495 | // ]); |
| 496 | |
| 497 | // expect(Scheduler).toFlushAndYield(['last passive']); |
| 498 | |
| 499 | // expect(onLoadSpy).toHaveBeenCalledTimes(1); |
| 500 | // }); |
| 501 | |
| 502 | it('correctly replays the last img load even when a yield + update causes the host element to change', async function () { |
| 503 | let externalSetSrc = null; |
| 504 | let externalSetSrcAlt = null; |
| 505 | |
| 506 | function Base() { |
| 507 | const [src, setSrc] = React.useState(null); |
| 508 | const [srcAlt, setSrcAlt] = React.useState(null); |
| 509 | externalSetSrc = setSrc; |
| 510 | externalSetSrcAlt = setSrcAlt; |
| 511 | return srcAlt || src ? <YieldingWithImage src={srcAlt || src} /> : null; |
| 512 | } |
| 513 | |
| 514 | function YieldingWithImage({src}) { |
| 515 | Scheduler.log('YieldingWithImage'); |
| 516 | React.useEffect(() => { |
| 517 | Scheduler.log('Committed'); |
| 518 | }); |
| 519 | return ( |
| 520 | <> |
| 521 | <Img src={src} onLoad={onLoadSpy} /> |
| 522 | <Yield /> |
| 523 | <Text text={src} /> |
| 524 | </> |
| 525 | ); |
| 526 | } |
| 527 | |
| 528 | const container = document.createElement('div'); |
| 529 | const root = ReactDOMClient.createRoot(container); |
| 530 | |
| 531 | root.render(<Base />); |
| 532 | |
| 533 | await waitForAll([]); |
| 534 | |
| 535 | React.startTransition(() => externalSetSrc('a')); |
| 536 | |
| 537 | await waitFor(['YieldingWithImage', 'Img a', 'Yield']); |
| 538 | let img = last(images); |
| 539 | loadImage(img); |
| 540 | assertLog(['actualLoadSpy [a]']); |
| 541 | |
| 542 | ReactDOM.flushSync(() => externalSetSrcAlt('b')); |
| 543 | |
| 544 | assertLog([ |
| 545 | 'YieldingWithImage', |
| 546 | 'Img b', |
| 547 | 'Yield', |
| 548 | 'b', |
| 549 | 'load triggered', |
| 550 | 'Committed', |
| 551 | ]); |
| 552 | expect(images.length).toBe(2); |
| 553 | img = last(images); |
| 554 | expect(img.__needsDispatch).toBe(true); |
| 555 | loadImage(img); |
| 556 | |
| 557 | assertLog(['actualLoadSpy [b]', 'onLoadSpy [b]']); |
| 558 | // why is there another update here? |
| 559 | await waitForAll(['YieldingWithImage', 'Img b', 'Yield', 'b', 'Committed']); |
| 560 | }); |
| 561 | |
| 562 | it('preserves the src property / attribute when triggering a potential new load event', async () => { |
| 563 | // this test covers a regression identified in https://github.com/mui/material-ui/pull/31263 |
| 564 | // where the resetting of the src property caused the property to change from relative to fully qualified |
| 565 | |
| 566 | // make sure we are not using the patched src setter |
| 567 | Object.defineProperty( |
| 568 | HTMLImageElement.prototype, |
| 569 | 'src', |
| 570 | originalHTMLImageElementSrcDescriptor, |
| 571 | ); |
| 572 | |
| 573 | const container = document.createElement('div'); |
| 574 | const root = ReactDOMClient.createRoot(container); |
| 575 | |
| 576 | React.startTransition(() => |
| 577 | root.render( |
| 578 | <PhaseMarkers> |
| 579 | <Img onLoad={onLoadSpy} /> |
| 580 | <Yield /> |
| 581 | <Text text={'a'} /> |
| 582 | </PhaseMarkers>, |
| 583 | ), |
| 584 | ); |
| 585 | |
| 586 | // render to yield to capture state of img src attribute and property before commit |
| 587 | await waitFor(['render start', 'Img default', 'Yield']); |
| 588 | const img = last(images); |
| 589 | const renderSrcProperty = img.src; |
| 590 | const renderSrcAttr = img.getAttribute('src'); |
| 591 | |
| 592 | // finish render and commit causing the src property to be rewritten |
| 593 | await waitForAll(['a', 'last layout', 'last passive']); |
| 594 | const commitSrcProperty = img.src; |
| 595 | const commitSrcAttr = img.getAttribute('src'); |
| 596 | |
| 597 | // ensure attribute and properties agree |
| 598 | expect(renderSrcProperty).toBe(commitSrcProperty); |
| 599 | expect(renderSrcAttr).toBe(commitSrcAttr); |
| 600 | }); |
| 601 | |
| 602 | it('captures the load event for Blob sources if it happens before commit phase', async function () { |
| 603 | const container = document.createElement('div'); |
| 604 | const root = ReactDOMClient.createRoot(container); |
| 605 | |
| 606 | const blob = new Blob(); |
| 607 | |
| 608 | React.startTransition(() => |
| 609 | root.render( |
| 610 | <PhaseMarkers> |
| 611 | <Img src={blob} onLoad={onLoadSpy} /> |
| 612 | <Yield /> |
| 613 | <Text text={'a'} /> |
| 614 | </PhaseMarkers>, |
| 615 | ), |
| 616 | ); |
| 617 | |
| 618 | await waitFor(['render start', 'Img [object Blob]', 'Yield']); |
| 619 | const img = last(images); |
| 620 | loadImage(img); |
| 621 | assertLog([ |
| 622 | 'actualLoadSpy [[object Blob]]', |
| 623 | // no onLoadSpy since we have not completed render |
| 624 | ]); |
| 625 | await waitForAll(['a', 'load triggered', 'last layout', 'last passive']); |
| 626 | expect(img.__needsDispatch).toBe(true); |
| 627 | loadImage(img); |
| 628 | assertLog([ |
| 629 | 'actualLoadSpy [[object Blob]]', // the browser reloading of the image causes this to yield again |
| 630 | 'onLoadSpy [[object Blob]]', |
| 631 | ]); |
| 632 | expect(onLoadSpy).toHaveBeenCalled(); |
| 633 | }); |
| 634 | |
| 635 | it('captures the load event for Blob sources if it happens after commit phase and replays it', async function () { |
| 636 | const container = document.createElement('div'); |
| 637 | const root = ReactDOMClient.createRoot(container); |
| 638 | |
| 639 | const blob = new Blob(); |
| 640 | |
| 641 | React.startTransition(() => |
| 642 | root.render( |
| 643 | <PhaseMarkers> |
| 644 | <Img src={blob} onLoad={onLoadSpy} /> |
| 645 | </PhaseMarkers>, |
| 646 | ), |
| 647 | ); |
| 648 | |
| 649 | await waitFor([ |
| 650 | 'render start', |
| 651 | 'Img [object Blob]', |
| 652 | 'load triggered', |
| 653 | 'last layout', |
| 654 | ]); |
| 655 | Scheduler.unstable_requestPaint(); |
| 656 | const img = last(images); |
| 657 | loadImage(img); |
| 658 | assertLog(['actualLoadSpy [[object Blob]]', 'onLoadSpy [[object Blob]]']); |
| 659 | await waitForAll(['last passive']); |
| 660 | expect(img.__needsDispatch).toBe(false); |
| 661 | expect(onLoadSpy).toHaveBeenCalledTimes(1); |
| 662 | }); |
| 663 | }); |