// Perf benchmark suite. Runs under the `perf` Playwright project (see // playwright.config.ts) via `pnpm test:perf`. Each scenario drives real // user input and captures browser-native signals via the recorder // installed by `perf-recorder.ts`: INP (Event Timing), LoAF, Long Tasks, // frame deltas. For function-level attribution, run with `PERF_TRACE=1` — // each scenario also dumps a Chrome trace JSON (load it via DevTools // "Performance" panel; pair with `pnpm build:profiling` so symbols are // unminified). import { expect, getPerfGridCenters, goToPerfGrid, test } from "./perf-fixtures.js"; import { idleFrame, recordScenario } from "./perf-recorder.js"; // web-vitals "needs improvement" threshold is 200ms; we cap synthetic // headless runs at 100ms so a real regression stands out from noise. const INP_SOFT_LIMIT_MS = 100; // Perf scenarios are timing-sensitive — retries don't make a flaky // measurement less flaky, they just waste minutes of CI. If a scenario // throws, show it immediately; multi-sample averaging inside // `recordScenario` is the right place to handle measurement variance. test.describe.configure({ mode: "serial", retries: 0 }); test.describe("@perf benchmarks", () => { test("hover-in-selection-mode @perf", async ({ reactGrab, page }, testInfo) => { await goToPerfGrid(page); const gridCells = await getPerfGridCenters(page, 500); await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "hover-in-selection-mode", async () => { for (const point of gridCells) { await page.mouse.move(point.x, point.y, { steps: 1 }); } await idleFrame(page, 4); }); await reactGrab.deactivate(); }); test("pointermove-storm-synthetic @perf", async ({ reactGrab, page }, testInfo) => { await goToPerfGrid(page); await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "pointermove-storm-synthetic", async () => { await page.evaluate(async () => { const cells = Array.from(document.querySelectorAll("[data-perf-row][data-perf-column]")); const stormSize = 10_000; for (let stormIndex = 0; stormIndex < stormSize; stormIndex++) { const cell = cells[stormIndex % cells.length]; const rect = cell.getBoundingClientRect(); cell.dispatchEvent( new PointerEvent("pointermove", { bubbles: true, cancelable: true, clientX: rect.left + rect.width / 2, clientY: rect.top + rect.height / 2, pointerId: 1, pointerType: "mouse", isPrimary: true, }), ); if (stormIndex % 256 === 255) { await new Promise((resolveTimer) => requestAnimationFrame(() => resolveTimer(null))); } } }); await idleFrame(page, 4); }); await reactGrab.deactivate(); }); test("copy-then-deactivate-stress @perf", async ({ reactGrab, page }, testInfo) => { const elementSelectors = [ "[data-testid='todo-list'] li:nth-child(1)", "[data-testid='nested-card']", "[data-testid='span-element']", "[data-testid='strong-element']", "[data-testid='code-element']", ]; const aggregate = await recordScenario( page, testInfo, "copy-then-deactivate-stress", async () => { for (let cycleIndex = 0; cycleIndex < 20; cycleIndex++) { const elementSelector = elementSelectors[cycleIndex % elementSelectors.length]; const elementLocator = page.locator(elementSelector).first(); if ((await elementLocator.count()) === 0) continue; const boundingBox = await elementLocator.boundingBox(); if (!boundingBox) continue; await reactGrab.activate(); await page.mouse.move( boundingBox.x + boundingBox.width / 2, boundingBox.y + boundingBox.height / 2, { steps: 2 }, ); // Snapshot taken BEFORE the click is dispatched so the waiter // only matches the new copy's labelInstance, not the lingering // ~1.5s fade from the previous cycle (Bugbot caught this). // Polling `isCopying === true` was unreliable because the full // active → copying → justCopied transition can finish inside one // microtask, faster than `waitForFunction`'s default poll. const cycleStartTimestamp = await page.evaluate(() => Date.now()); await page.mouse.down(); await page.mouse.up(); await page.waitForFunction( (clickTimestamp) => { const instances = window.__REACT_GRAB__?.getState?.()?.labelInstances ?? []; return instances.some( (instance) => instance.createdAt >= clickTimestamp && (instance.status === "copied" || instance.status === "fading"), ); }, cycleStartTimestamp, { timeout: 2000 }, ); await page.keyboard.press("Escape"); await page.waitForTimeout(80); } await idleFrame(page, 4); }, ); expect.soft(aggregate.inp).toBeLessThan(INP_SOFT_LIMIT_MS); }); test("drag-selection-sweep @perf", async ({ reactGrab, page }, testInfo) => { await goToPerfGrid(page); const gridCells = await getPerfGridCenters(page); if (gridCells.length < 30) { test.skip(true, "perf grid has fewer than 30 cells"); return; } await recordScenario( page, testInfo, "drag-selection-sweep", async () => { for (let dragIndex = 0; dragIndex < 20; dragIndex++) { const startCell = gridCells[(dragIndex * 5) % gridCells.length]; const endCell = gridCells[(dragIndex * 5 + 12) % gridCells.length]; await page.mouse.move(startCell.x - 6, startCell.y - 6, { steps: 1 }); await page.mouse.down(); await page.mouse.move(endCell.x + 6, endCell.y + 6, { steps: 8 }); await page.mouse.up(); await page.waitForTimeout(60); await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { // body Escapes after each drag; re-activate per sample. beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); }); test("scroll-during-selection @perf", async ({ reactGrab, page }, testInfo) => { await reactGrab.activate(); await page.mouse.move(400, 300, { steps: 2 }); await idleFrame(page, 2); await recordScenario(page, testInfo, "scroll-during-selection", async () => { for (let scrollIndex = 0; scrollIndex < 200; scrollIndex++) { const scrollDeltaY = scrollIndex % 2 === 0 ? 80 : -80; await page.mouse.wheel(0, scrollDeltaY); await page.waitForTimeout(12); } await idleFrame(page, 4); }); await page.keyboard.press("Escape"); }); test("hover-over-animated-elements @perf", async ({ reactGrab, page }, testInfo) => { // Matches the laggy-on-real-sites case: hovering near CSS-animated // elements forces the freeze-pseudo-states + animation-finish paths // every time the detected element changes. const animatedSelectors = [ "[data-testid='animated-pulse']", "[data-testid='animated-bounce']", "[data-testid='animated-spin']", "[data-testid='animated-section']", "[data-testid='gradient-div']", ]; const hoverTargets: Array<{ x: number; y: number }> = []; for (const animatedSelector of animatedSelectors) { const locator = page.locator(animatedSelector).first(); if ((await locator.count()) === 0) continue; const box = await locator.boundingBox(); if (!box) continue; hoverTargets.push({ x: box.x + box.width / 2, y: box.y + box.height / 2 }); } if (hoverTargets.length === 0) { test.skip(true, "no animated targets in e2e-app"); return; } await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "hover-over-animated-elements", async () => { for (let passIndex = 0; passIndex < 30; passIndex++) { for (const target of hoverTargets) { await page.mouse.move(target.x, target.y, { steps: 2 }); await page.waitForTimeout(20); } } await idleFrame(page, 4); }); await reactGrab.deactivate(); }); test("context-menu-open-close-cycle @perf", async ({ reactGrab, page }, testInfo) => { // Right-click → context menu opens → escape closes. Each cycle // re-mounts the menu DOM, runs its dropdown-anchored positioning, // and re-runs deactivate cleanup on dismiss. const targetSelectors = [ "[data-testid='todo-list'] li:nth-child(2)", "[data-testid='nested-card']", "[data-testid='span-element']", "[data-testid='td-1-2']", ]; await recordScenario( page, testInfo, "context-menu-open-close-cycle", async () => { for (let cycleIndex = 0; cycleIndex < 30; cycleIndex++) { const elementLocator = page .locator(targetSelectors[cycleIndex % targetSelectors.length]) .first(); if ((await elementLocator.count()) === 0) continue; await elementLocator.click({ button: "right", force: true }); await page.waitForTimeout(40); await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { // Escape after each cycle dismisses the menu AND deactivates; // re-activate per sample so cycles 2..N still exercise the menu. beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); await reactGrab.deactivate(); }); test("prompt-mode-typing @perf", async ({ reactGrab, page }, testInfo) => { // Enters prompt mode and types a paragraph. Exercises the textarea // auto-resize, reactive input signal, and per-keystroke memo // re-evaluation in the selection-label tree. await reactGrab.registerCommentAction(); await reactGrab.enterPromptMode("[data-testid='span-element']"); const promptText = "Refactor this component so the rendering logic is split from the data fetching layer, " + "and add a loading skeleton plus an error retry button."; await recordScenario( page, testInfo, "prompt-mode-typing", async () => { for (const character of promptText) { await page.keyboard.type(character); // Slow enough to capture per-keystroke INP but fast enough to // finish in a reasonable scenario duration. await page.waitForTimeout(8); } await idleFrame(page, 4); }, // Typing 150 chars takes ~2s independent of system load — variance // is low, so one sample is enough and we save ~4s of CI time. { samples: 1 }, ); await page.keyboard.press("Escape"); await page.keyboard.press("Escape"); }); test("rapid-toggle-active-inactive @perf", async ({ reactGrab, page }, testInfo) => { // Just activate/deactivate via the bare API — no Escape keypress, no // pointer interaction — so the measurement is purely the install/ // uninstall cost of freeze-pseudo-states + freeze-animations + // freezeUpdates. Using `reactGrab.deactivate()` here would route // through `page.keyboard.press("Escape")`, which adds keydown event // dispatch + Event Timing INP overhead to every cycle. // reactGrab is destructured solely to trigger the fixture that // navigates the page to "/" before the scenario runs. void reactGrab; await recordScenario( page, testInfo, "rapid-toggle-active-inactive", async () => { for (let cycleIndex = 0; cycleIndex < 80; cycleIndex++) { await page.evaluate(() => window.__REACT_GRAB__?.activate?.()); await idleFrame(page, 1); await page.evaluate(() => window.__REACT_GRAB__?.deactivate?.()); await idleFrame(page, 1); } await idleFrame(page, 4); }, { samples: 2 }, ); }); test("idle-after-activation @perf", async ({ reactGrab, page }, testInfo) => { // Sanity baseline: after activate, the library should do effectively // no work until a user gesture arrives. If a long task or LoAF shows // up here, something is polling/timer-ticking that shouldn't be. await reactGrab.activate(); await idleFrame(page, 4); await recordScenario( page, testInfo, "idle-after-activation", async () => { await page.waitForTimeout(2000); }, // No user input + no library work — variance is approximately zero, // so one 2s sample is enough. { samples: 1 }, ); await reactGrab.deactivate(); }); test("large-drag-selection @perf", async ({ reactGrab, page }, testInfo) => { // One huge drag rectangle covering ~half the perf grid. Stresses // getElementsInDrag's coverage sampling at the upper bound of // candidate count. await goToPerfGrid(page); await recordScenario( page, testInfo, "large-drag-selection", async () => { const viewport = page.viewportSize() ?? { width: 1280, height: 720 }; for (let dragIndex = 0; dragIndex < 8; dragIndex++) { await page.mouse.move(20, 80, { steps: 1 }); await page.mouse.down(); await page.mouse.move(viewport.width - 40, viewport.height - 40, { steps: 16 }); await page.mouse.up(); await page.waitForTimeout(80); await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); }); test("deep-element-stack-hover @perf", async ({ reactGrab, page, perfDom }, testInfo) => { // 2000 absolutely-positioned divs stacked at one point. Every hit-test // walks the full stack via elementsFromPoint + isValidGrabbableElement // filter — pathological case for large dense DOMs (per the comment // in pointer-events-freeze.ts about GitHub diff viewers). await perfDom.installDeepStack(2000); await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "deep-element-stack-hover", async () => { // Wiggle the pointer inside the stack so each move counts as a new // detection (setPointer dedupes identical positions). 200 hit-tests, // each walking ~2000 stacked elements. for (let moveIndex = 0; moveIndex < 200; moveIndex++) { const x = 250 + (moveIndex % 11); const y = 250 + (moveIndex % 13); await page.mouse.move(x, y, { steps: 1 }); } await idleFrame(page, 4); }); await reactGrab.deactivate(); }); // ─── DOM-density variants ────────────────────────────────────────── test("hover-dense-flat-dom @perf", async ({ reactGrab, page, perfDom }, testInfo) => { // 3000 small tiles across the viewport — each detection lands on a // different element, exercising bounds-cache + isValidGrabbableElement // filter at different DOM depths (vs. deep-element-stack-hover which // stacks them all at one point). await perfDom.installDenseFlat(3000); await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "hover-dense-flat-dom", async () => { // Spiral across the dense grid hitting many distinct elements. for (let moveIndex = 0; moveIndex < 400; moveIndex++) { const radius = 50 + (moveIndex % 200); const angle = moveIndex * 0.13; await page.mouse.move(400 + Math.cos(angle) * radius, 300 + Math.sin(angle) * radius, { steps: 1, }); } await idleFrame(page, 4); }); await reactGrab.deactivate(); }); test("hover-deep-nested-dom @perf", async ({ reactGrab, page, perfDom }, testInfo) => { // 60-level deep nested divs. Every detection walks the parent chain // through isValidGrabbableElement filtering + bounds-cache lookup. // Periodic ancestor transforms make the browser do real layout // composition work so the scenario isn't artificially flat. await perfDom.installDeepNested(60); await reactGrab.activate(); await idleFrame(page, 2); await recordScenario(page, testInfo, "hover-deep-nested-dom", async () => { // Many hovers near center of the nest — every detection walks // through the same deeply nested chain. for (let moveIndex = 0; moveIndex < 200; moveIndex++) { await page.mouse.move(400 + (moveIndex % 11), 400 + (moveIndex % 13), { steps: 1 }); } await idleFrame(page, 4); }); await reactGrab.deactivate(); }); // ─── Drag variants ───────────────────────────────────────────────── test("drag-with-autoscroll @perf", async ({ reactGrab, page }, testInfo) => { // Drag near the bottom viewport edge so AUTO_SCROLL_EDGE_THRESHOLD_PX // kicks in and autoScroller starts ticking. Exercises the rAF-driven // scroll path that runs concurrently with the drag. await goToPerfGrid(page); await recordScenario( page, testInfo, "drag-with-autoscroll", async () => { const viewport = page.viewportSize() ?? { width: 1280, height: 720 }; // Five long drags ending near the bottom edge so autoscroll engages // for the tail of each drag. for (let dragIndex = 0; dragIndex < 5; dragIndex++) { await page.mouse.move(60, 80, { steps: 1 }); await page.mouse.down(); await page.mouse.move(viewport.width - 60, viewport.height - 12, { steps: 30 }); // Hold at the edge so autoscroll keeps firing. await page.waitForTimeout(400); await page.mouse.up(); await page.waitForTimeout(80); await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); }); test("drag-rapid-zigzag @perf", async ({ reactGrab, page }, testInfo) => { // Drag in a zigzag pattern with frequent direction changes — each // change recomputes the drag rectangle and dispatches new pointer // moves at full resolution. await goToPerfGrid(page); await recordScenario( page, testInfo, "drag-rapid-zigzag", async () => { for (let dragIndex = 0; dragIndex < 6; dragIndex++) { await page.mouse.move(200, 200, { steps: 1 }); await page.mouse.down(); for (let zigIndex = 0; zigIndex < 12; zigIndex++) { await page.mouse.move(200 + (zigIndex % 2 === 0 ? 400 : -50), 200 + zigIndex * 30, { steps: 4, }); } await page.mouse.up(); await page.waitForTimeout(60); await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); }); // ─── Copy / multi-select variants ────────────────────────────────── test("copy-multi-element-batch @perf", async ({ reactGrab, page }, testInfo) => { // Shift+click 20 elements then trigger copy via Cmd+Enter. Multi- // element copy fans out through clipboard payload aggregation + // per-element stack symbolication. await goToPerfGrid(page); const gridPoints = await getPerfGridCenters(page, 20); await recordScenario( page, testInfo, "copy-multi-element-batch", async () => { await page.keyboard.down("Shift"); for (const point of gridPoints) { await page.mouse.move(point.x, point.y, { steps: 1 }); await page.mouse.click(point.x, point.y); await page.waitForTimeout(15); } await page.keyboard.up("Shift"); await page.waitForTimeout(80); // Cmd/Ctrl+Enter triggers a copy of the multi-select. const modifierKey = process.platform === "darwin" ? "Meta" : "Control"; await page.keyboard.press(`${modifierKey}+Enter`); await page.waitForTimeout(200); await idleFrame(page, 4); }, { samples: 2, // Cmd+Enter copies, then deactivates after Copied… fades — // re-activate per sample so sample 2 still has a fresh selection. beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); await page.keyboard.press("Escape"); }); // ─── Animation density ───────────────────────────────────────────── test("activate-with-many-animations @perf", async ({ page, perfDom }, testInfo) => { // 150 CSS-animated divs, then 20 activate/deactivate cycles. Isolates // the freeze-pseudo-states + freeze-animations + freezeUpdates // install/uninstall cost from pointer / detection noise. await perfDom.installCssAnimations(150); await recordScenario( page, testInfo, "activate-with-many-animations", async () => { for (let cycleIndex = 0; cycleIndex < 20; cycleIndex++) { await page.evaluate(() => window.__REACT_GRAB__?.activate?.()); await idleFrame(page, 1); await page.evaluate(() => window.__REACT_GRAB__?.deactivate?.()); await idleFrame(page, 1); } await idleFrame(page, 4); }, { samples: 2 }, ); }); test("deactivate-with-many-frozen-elements @perf", async ({ reactGrab, page }, testInfo) => { // Shift-click 15 elements (multi-freeze), then deactivate. Stresses // the bulk-unfreeze of frozen elements, frozenElementBoundsAccessors // teardown, and labelInstance fadeout. await goToPerfGrid(page); await recordScenario( page, testInfo, "deactivate-with-many-frozen-elements", async () => { const points = await getPerfGridCenters(page, 15); for (let cycleIndex = 0; cycleIndex < 6; cycleIndex++) { await reactGrab.activate(); await page.keyboard.down("Shift"); for (const point of points) { await page.mouse.move(point.x, point.y, { steps: 1 }); await page.mouse.click(point.x, point.y); await page.waitForTimeout(12); } await page.keyboard.up("Shift"); await page.waitForTimeout(60); await page.keyboard.press("Escape"); await page.waitForTimeout(80); } await idleFrame(page, 4); }, { samples: 2 }, ); }); // ─── Keyboard / menu paths ───────────────────────────────────────── test("context-menu-arrow-navigation @perf", async ({ reactGrab, page }, testInfo) => { // Open the context menu and walk its items via arrow keys. Each // press re-positions the menu-highlight and may scroll the menu. const target = page.locator("[data-testid='nested-card']").first(); if ((await target.count()) === 0) { test.skip(true, "no nested-card target"); return; } await recordScenario( page, testInfo, "context-menu-arrow-navigation", async () => { for (let cycleIndex = 0; cycleIndex < 10; cycleIndex++) { await target.click({ button: "right", force: true }); await page.waitForTimeout(60); for (let pressIndex = 0; pressIndex < 6; pressIndex++) { await page.keyboard.press(pressIndex % 2 === 0 ? "ArrowDown" : "ArrowUp"); await page.waitForTimeout(16); } await page.keyboard.press("Escape"); await page.waitForTimeout(40); } await idleFrame(page, 4); }, { // Escape after each cycle dismisses the menu AND deactivates. beforeEachSample: async () => { await reactGrab.activate(); await idleFrame(page, 2); }, }, ); await reactGrab.deactivate(); }); test("keyboard-rapid-arrows @perf", async ({ reactGrab, page }, testInfo) => { // Selection active, hammer arrow keys without entering arrow-nav // menu. Tests the keyboard-handler path's debounce + decision logic. await reactGrab.activate(); await page.locator("[data-testid='nested-card']").first().hover({ force: true }); await page.waitForTimeout(200); await recordScenario(page, testInfo, "keyboard-rapid-arrows", async () => { const arrowKeys = ["ArrowDown", "ArrowUp", "ArrowLeft", "ArrowRight"] as const; for (let pressIndex = 0; pressIndex < 200; pressIndex++) { await page.keyboard.press(arrowKeys[pressIndex % arrowKeys.length]); await page.waitForTimeout(8); } await idleFrame(page, 4); }); await page.keyboard.press("Escape"); }); // ─── Toolbar interactions ────────────────────────────────────────── test("toolbar-drag-to-edges @perf", async ({ reactGrab, page }, testInfo) => { // Drag the toolbar to each of the 4 viewport edges (snap kicks in // each time). Stresses the toolbar drag physics + snap recalc. await recordScenario( page, testInfo, "toolbar-drag-to-edges", async () => { for (let cycleIndex = 0; cycleIndex < 5; cycleIndex++) { await reactGrab.dragToolbar(-400, -200); await reactGrab.dragToolbar(400, -200); await reactGrab.dragToolbar(400, 200); await reactGrab.dragToolbar(-400, 200); } await idleFrame(page, 4); }, { samples: 2 }, ); }); test("toolbar-collapse-expand-cycle @perf", async ({ reactGrab, page }, testInfo) => { // Rapid toolbar collapse + expand. Stresses the collapse animation // path that the AGENTS.md comment in constants.ts about // TOOLBAR_COLLAPSE_ANIMATION_DURATION_MS specifically calls out. await recordScenario( page, testInfo, "toolbar-collapse-expand-cycle", async () => { for (let cycleIndex = 0; cycleIndex < 15; cycleIndex++) { await reactGrab.clickToolbarCollapse(); await page.waitForTimeout(120); await reactGrab.clickToolbarCollapse(); await page.waitForTimeout(120); } await idleFrame(page, 4); }, { samples: 2 }, ); }); // ─── Edge / integration ──────────────────────────────────────────── test("dom-rerender-during-selection @perf", async ({ reactGrab, page }, testInfo) => { // Selection active, rapidly add and remove DOM nodes (React triggers // a re-render each time). Tests that selection bounds stay stable // while React is mutating the tree. await reactGrab.activate(); const dynamicSection = page.locator("[data-testid='dynamic-section']").first(); if ((await dynamicSection.count()) === 0) { test.skip(true, "no dynamic-section target"); return; } const box = await dynamicSection.boundingBox(); if (!box) { test.skip(true, "no dynamic-section bounds"); return; } await page.mouse.move(box.x + 20, box.y + 20, { steps: 2 }); await recordScenario( page, testInfo, "dom-rerender-during-selection", async () => { const addButton = page.locator("[data-testid='add-element-button']").first(); // Burst: add 5 in a row, then remove all, repeat. Each add/remove // is a React render that recommits the section subtree. for (let burstIndex = 0; burstIndex < 10; burstIndex++) { for (let addIndex = 0; addIndex < 5; addIndex++) { await addButton.click({ force: true }); await page.waitForTimeout(8); } let removeButton = page.locator("[data-testid^='remove-element-']").first(); while ((await removeButton.count()) > 0) { await removeButton.click({ force: true }); await page.waitForTimeout(6); removeButton = page.locator("[data-testid^='remove-element-']").first(); } } await idleFrame(page, 4); }, { samples: 2 }, ); await reactGrab.deactivate(); }); test("viewport-resize-during-selection @perf", async ({ reactGrab, page }, testInfo) => { // Resize the viewport while a selection is active. Tests // viewport-version invalidation, bounds recompute, and the // resize-handler scaling of pointer coordinates. await reactGrab.activate(); await page.locator("[data-testid='nested-card']").first().hover({ force: true }); await page.waitForTimeout(200); const viewportSizes = [ { width: 1024, height: 700 }, { width: 1400, height: 900 }, { width: 800, height: 600 }, { width: 1280, height: 720 }, ]; await recordScenario( page, testInfo, "viewport-resize-during-selection", async () => { for (let cycleIndex = 0; cycleIndex < 15; cycleIndex++) { await page.setViewportSize(viewportSizes[cycleIndex % viewportSizes.length]); await page.waitForTimeout(80); } await idleFrame(page, 4); }, // Each resize includes a fixed 80ms settle; the actual library work // is tiny relative to that, so 2 samples is plenty. { samples: 2 }, ); await page.keyboard.press("Escape"); await page.setViewportSize({ width: 1280, height: 720 }); }); });