How to use createAndAccumulateChangeEvent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ChangeEventPlugin.js

Source: ChangeEventPlugin.js Github

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1 function registerEvents$1() {2 registerTwoPhaseEvent('onChange', ['change', 'click', 'focusin', 'focusout', 'input', 'keydown', 'keyup', 'selectionchange']);3 }4 function createAndAccumulateChangeEvent(dispatchQueue, inst, nativeEvent, target) {5 /​/​ Flag this event loop as needing state restore.6 enqueueStateRestore(target);7 var listeners = accumulateTwoPhaseListeners(inst, 'onChange');8 if (listeners.length > 0) {9 var event = new SyntheticEvent('onChange', 'change', null, nativeEvent, target);10 dispatchQueue.push({11 event: event,12 listeners: listeners13 });14 }15 }16 /​**17 * For IE shims18 */​19 var activeElement = null;20 var activeElementInst = null;21 /​**22 * SECTION: handle `change` event23 */​24 function shouldUseChangeEvent(elem) {25 var nodeName = elem.nodeName && elem.nodeName.toLowerCase();26 return nodeName === 'select' || nodeName === 'input' && elem.type === 'file';27 }28 function manualDispatchChangeEvent(nativeEvent) {29 var dispatchQueue = [];30 createAndAccumulateChangeEvent(dispatchQueue, activeElementInst, nativeEvent, getEventTarget(nativeEvent)); /​/​ If change and propertychange bubbled, we'd just bind to it like all the31 /​/​ other events and have it go through ReactBrowserEventEmitter. Since it32 /​/​ doesn't, we manually listen for the events and so we have to enqueue and33 /​/​ process the abstract event manually.34 /​/​35 /​/​ Batching is necessary here in order to ensure that all event handlers run36 /​/​ before the next rerender (including event handlers attached to ancestor37 /​/​ elements instead of directly on the input). Without this, controlled38 /​/​ components don't work properly in conjunction with event bubbling because39 /​/​ the component is rerendered and the value reverted before all the event40 /​/​ handlers can run. See https:/​/​github.com/​facebook/​react/​issues/​708.41 batchedUpdates(runEventInBatch, dispatchQueue);42 }43 function runEventInBatch(dispatchQueue) {44 processDispatchQueue(dispatchQueue, 0);45 }46 function getInstIfValueChanged(targetInst) {47 var targetNode = getNodeFromInstance(targetInst);48 if (updateValueIfChanged(targetNode)) {49 return targetInst;50 }51 }52 function getTargetInstForChangeEvent(domEventName, targetInst) {53 if (domEventName === 'change') {54 return targetInst;55 }56 }57 /​**58 * SECTION: handle `input` event59 */​60 var isInputEventSupported = false;61 if (canUseDOM) {62 /​/​ IE9 claims to support the input event but fails to trigger it when63 /​/​ deleting text, so we ignore its input events.64 isInputEventSupported = isEventSupported('input') && (!document.documentMode || document.documentMode > 9);65 }66 /​**67 * (For IE <=9) Starts tracking propertychange events on the passed-in element68 * and override the value property so that we can distinguish user events from69 * value changes in JS.70 */​71 function startWatchingForValueChange(target, targetInst) {72 activeElement = target;73 activeElementInst = targetInst;74 activeElement.attachEvent('onpropertychange', handlePropertyChange);75 }76 /​**77 * (For IE <=9) Removes the event listeners from the currently-tracked element,78 * if any exists.79 */​80 function stopWatchingForValueChange() {81 if (!activeElement) {82 return;83 }84 activeElement.detachEvent('onpropertychange', handlePropertyChange);85 activeElement = null;86 activeElementInst = null;87 }88 /​**89 * (For IE <=9) Handles a propertychange event, sending a `change` event if90 * the value of the active element has changed.91 */​92 function handlePropertyChange(nativeEvent) {93 if (nativeEvent.propertyName !== 'value') {94 return;95 }96 if (getInstIfValueChanged(activeElementInst)) {97 manualDispatchChangeEvent(nativeEvent);98 }99 }100 function handleEventsForInputEventPolyfill(domEventName, target, targetInst) {101 if (domEventName === 'focusin') {102 /​/​ In IE9, propertychange fires for most input events but is buggy and103 /​/​ doesn't fire when text is deleted, but conveniently, selectionchange104 /​/​ appears to fire in all of the remaining cases so we catch those and105 /​/​ forward the event if the value has changed106 /​/​ In either case, we don't want to call the event handler if the value107 /​/​ is changed from JS so we redefine a setter for `.value` that updates108 /​/​ our activeElementValue variable, allowing us to ignore those changes109 /​/​110 /​/​ stopWatching() should be a noop here but we call it just in case we111 /​/​ missed a blur event somehow.112 stopWatchingForValueChange();113 startWatchingForValueChange(target, targetInst);114 } else if (domEventName === 'focusout') {115 stopWatchingForValueChange();116 }117 } /​/​ For IE8 and IE9.118 function getTargetInstForInputEventPolyfill(domEventName, targetInst) {119 if (domEventName === 'selectionchange' || domEventName === 'keyup' || domEventName === 'keydown') {120 /​/​ On the selectionchange event, the target is just document which isn't121 /​/​ helpful for us so just check activeElement instead.122 /​/​123 /​/​ 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire124 /​/​ propertychange on the first input event after setting `value` from a125 /​/​ script and fires only keydown, keypress, keyup. Catching keyup usually126 /​/​ gets it and catching keydown lets us fire an event for the first127 /​/​ keystroke if user does a key repeat (it'll be a little delayed: right128 /​/​ before the second keystroke). Other input methods (e.g., paste) seem to129 /​/​ fire selectionchange normally.130 return getInstIfValueChanged(activeElementInst);131 }132 }133 /​**134 * SECTION: handle `click` event135 */​136 function shouldUseClickEvent(elem) {137 /​/​ Use the `click` event to detect changes to checkbox and radio inputs.138 /​/​ This approach works across all browsers, whereas `change` does not fire139 /​/​ until `blur` in IE8.140 var nodeName = elem.nodeName;141 return nodeName && nodeName.toLowerCase() === 'input' && (elem.type === 'checkbox' || elem.type === 'radio');142 }143 function getTargetInstForClickEvent(domEventName, targetInst) {144 if (domEventName === 'click') {145 return getInstIfValueChanged(targetInst);146 }147 }148 function getTargetInstForInputOrChangeEvent(domEventName, targetInst) {149 if (domEventName === 'input' || domEventName === 'change') {150 return getInstIfValueChanged(targetInst);151 }152 }153 function handleControlledInputBlur(node) {154 var state = node._wrapperState;155 if (!state || !state.controlled || node.type !== 'number') {156 return;157 }158 {159 /​/​ If controlled, assign the value attribute to the current value on blur160 setDefaultValue(node, 'number', node.value);161 }162 }163 /​**164 * This plugin creates an `onChange` event that normalizes change events165 * across form elements. This event fires at a time when it's possible to166 * change the element's value without seeing a flicker.167 *168 * Supported elements are:169 * - input (see `isTextInputElement`)170 * - textarea171 * - select172 */​173 function extractEvents$1(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {174 var targetNode = targetInst ? getNodeFromInstance(targetInst) : window;175 var getTargetInstFunc, handleEventFunc;176 if (shouldUseChangeEvent(targetNode)) {177 getTargetInstFunc = getTargetInstForChangeEvent;178 } else if (isTextInputElement(targetNode)) {179 if (isInputEventSupported) {180 getTargetInstFunc = getTargetInstForInputOrChangeEvent;181 } else {182 getTargetInstFunc = getTargetInstForInputEventPolyfill;183 handleEventFunc = handleEventsForInputEventPolyfill;184 }185 } else if (shouldUseClickEvent(targetNode)) {186 getTargetInstFunc = getTargetInstForClickEvent;187 }188 if (getTargetInstFunc) {189 var inst = getTargetInstFunc(domEventName, targetInst);190 if (inst) {191 createAndAccumulateChangeEvent(dispatchQueue, inst, nativeEvent, nativeEventTarget);192 return;193 }194 }195 if (handleEventFunc) {196 handleEventFunc(domEventName, targetNode, targetInst);197 } /​/​ When blurring, set the value attribute for number inputs198 if (domEventName === 'focusout') {199 handleControlledInputBlur(targetNode);200 }...

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1const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​frames');2const { createTestServer } = require('playwright-core/​lib/​utils/​testserver/​');3const { test } = require('playwright-core/​lib/​utils/​testrunner/​');4const { testRunner } = require('playwright-core/​lib/​utils/​testrunner/​');5const { testFixtures } = require('playwright-core/​lib/​utils/​testrunner/​');6const { expect } = require('playwright-core/​lib/​utils/​testrunner/​');7const { attachFrame } = require('playwright-core/​lib/​utils/​testrunner/​');8const { attachWorker } = require('playwright-core/​lib/​utils/​testrunner/​');9const { attachPage } = require('playwright-core/​lib/​utils/​testrunner/​');10const { createTestState } = require('playwright-core/​lib/​utils/​testrunner/​');11const { createTestWorker } = require('playwright-core/​lib/​utils/​testrunner/​');12const { createTestPage } = require('playwright-core/​lib/​utils/​testrunner/​');13const { createTestBrowser } = require('playwright-core/​lib/​utils/​testrunner/​');14const { createTestBrowserContext } = require('playwright-core/​lib/​utils/​testrunner/​');15const { createTestServer } = require('playwright-core/​lib/​utils/​testserver/​');16const { createTestBrowserServer } = require('playwright-core/​lib/​utils/​testserver/​');17const { createTestBrowserType } = require('playwright-core/​lib/​utils/​testrunner/​');18const { createTestDevice } = require('playwright-core/​lib/​utils/​testrunner/​');19const { createTestLauncher } = require('playwright-core/​lib/​utils/​testrunner/​');20const { createTestBrowserFetcher } = require('playwright-core/​lib/​utils/​testrunner/​');21const { createTestBrowserController } = require('playwright-core/​lib/​utils/​testserver/​');22const { createTestBrowserServerController } = require('playwright-core/​lib/​utils/​testserver/​');23const { createTestBrowserServerLauncher } = require('playwright-core/​lib/​utils/​testserver/​');24const { createTestBrowserTypeLauncher } = require('playwright-core/​lib/​utils/​testrunner/​');25const { createTestBrowserTypeController } = require('playwright-core/​lib/​utils/​testserver/​');26const { createTestBrowserTypeServerLauncher } = require('playwright-core/​lib/​utils/​testserver/​');27const { createTestBrowserTypeServerController } = require('playwright-core/​lib/​utils/​testserver/​');28const { createTestBrowserType } = require('playwright-core/​lib/​utils/​testrunner/​');29const { createTestDevice }

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');2const { Page } = require('playwright-core/​lib/​server/​page');3const { toProtocol } = require('playwright-core/​lib/​server/​converters');4const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');5const { Page } = require('playwright-core/​lib/​server/​page');6const { toProtocol } = require('playwright-core/​lib/​server/​converters');7const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');8const { Page } = require('playwright-core/​lib/​server/​page');9const { toProtocol } = require('playwright-core/​lib/​server/​converters');10const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');11const { Page } = require('playwright-core/​lib/​server/​page');12const { toProtocol } = require('playwright-core/​lib/​server/​converters');13const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');14const { Page } = require('playwright-core/​lib/​server/​page');15const { toProtocol } = require('playwright-core/​lib/​server/​converters');16const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');17const { Page } = require('playwright-core/​lib/​server/​page');18const { toProtocol } = require('playwright-core/​lib/​server/​converters');19const { createAndAccumulateChangeEvent } = require('playwright-core/​lib/​server/​inspector');20const { Page } = require('playwright-core/​lib/​server/​page');21const { toProtocol } = require('playwright-core/​lib/​server/​converters');22const { createAndAccumulateChangeEvent } = require('playwright

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​trace/​recorder');2const event = createAndAccumulateChangeEvent('input', {3 boundingBox: {4 },5});6const { createAndAccumulateActionEvent } = require('@playwright/​test/​lib/​server/​trace/​recorder');7const action = createAndAccumulateActionEvent('test', {8 boundingBox: {9 },10});11const { createAndAccumulateErrorEvent } = require('@playwright/​test/​lib/​server/​trace/​recorder');12const error = createAndAccumulateErrorEvent('test', {13 boundingBox: {14 },15});16const { createAndAccumulateSnapshotEvent } = require('@playwright/​test/​lib/​server/​trace/​recorder');17const snapshot = createAndAccumulateSnapshotEvent('test', {

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright/​lib/​internal/​protocol/​protocol.js');2const { createTestServer } = require('playwright/​lib/​utils/​utils.js');3const server = await createTestServer();4server.setRoute('/​empty.html', (req, res) => {5 res.end();6});7const browser = await chromium.launch();8const page = await browser.newPage();9const context = await browser.newContext();10const eventAccumulator = context._eventAccumulator;11const event = createAndAccumulateChangeEvent(eventAccumulator, 'page', {12});13console.log(event);14await browser.close();15server.stop();16I am trying to create an event using the createAndAccumulateChangeEvent method of the internal API. I am using the createTestServer method to create a server to serve the page. I am able to create the event but it doesn't have the frameId property. I am using the frameId property to create a route in the server. I am not sure how to get the frameId. I tried using the frame.id() method but it is undefined. I also tried using the frame._id property but it is also undefined. Can anyone help me out with this?17I am trying to create an event using the createAndAccumulateChangeEvent method of the internal API. I am using the createTestServer method to create a server to serve the page. I am able to create the event but it doesn't have the frameId property. I am using the frameId property to create a route in the server. I am not sure how to get the frameId. I tried using the frame.id() method but it is undefined. I also tried using the frame._id property but it is also undefined. Can anyone help me out with this?18const { createAndAccumulateChangeEvent } = require('playwright/​lib/​internal/​protocol/​protocol.js');19const { createTestServer } = require

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​frames');2const { Frame } = require('playwright/​lib/​server/​frame');3const { EventEmitter } = require('events');4const { createTestState } = require('playwright/​lib/​server/​test/​state');5const { helper } = require('playwright/​lib/​server/​helper');6const { Playwright } = require('playwright/​lib/​server/​playwright');7const { BrowserContext } = require('playwright/​lib/​server/​browserContext');8const { Browser } = require('playwright/​lib/​server/​browser');9const { BrowserServer } = require('playwright/​lib/​server/​browserServer');10const { ProgressController } = require('playwright/​lib/​utils/​progress');11const { BrowserType } = require('playwright/​lib/​server/​browserType');12const { Connection } = require('playwright/​lib/​server/​connection');13const { Events } = require('playwright/​lib/​server/​events');14const { debugLogger } = require('playwright/​lib/​utils/​debugLogger');15const { CRBrowser } = require('playwright/​lib/​server/​chromium/​crBrowser');16const { CRBrowserContext } = require('playwright/​lib/​server/​chromium/​crBrowserContext');17const { CRPage } = require('playwright/​lib/​server/​chromium/​crPage');18const { CRSession } = require('playwright/​lib/​server/​chromium/​crConnection');19const { CRConnection } = require('playwright/​lib/​server/​chromium/​crConnection');20const { assert } = require('playwright/​lib/​utils/​utils');21const { Registry } = require('playwright/​lib/​server/​registry');22const { CRIConnection } = require('playwright/​lib/​server/​chromium/​crConnection');23const { TimeoutSettings } = require('playwright/​lib/​utils/​timeoutSettings');24const { BrowserContextBase } = require('playwright/​lib/​server/​browserContext');25const { Page } = require('playwright/​lib/​server/​page');26const { FrameBase } = require('playwright/​lib/​server/​frame');27const { ElementHandle } = require('playwright/​lib/​server/​dom');28const { JSHandle } = require('playwright/​lib/​server/​dom');29const { CDPSession } = require('playwright/​lib/​server/​cdpSession');30const { Protocol } = require('playwright/​lib/​protocol');31const { ChannelOwner } = require('playwright/​lib/​server/​channelOwner');32const { Dispatcher } = require('playwright/​lib/​server/​dispatchers');33const { DispatcherConnection } = require('playwright/​lib/​server/​dis

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright/​lib/​protocol/​events');2console.log(event);3{4}5const { createAndAccumulateChangeEvent } = require('playwright/​lib/​protocol/​events');6console.log(event);7{8}9const { createAndAccumulateChangeEvent } = require('playwright/​lib/​protocol/​events');10console.log(event);11{12}13const { createAndAccumulateChangeEvent } = require('playwright/​lib/​protocol/​events');14console.log(event);15{16}17const { createAndAccumulateChangeEvent } = require('playwright/​lib/​protocol

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');2const event = createAndAccumulateChangeEvent('request', 'request', {});3console.log(event);4const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');5const event = createAndAccumulateChangeEvent('request', 'request', {});6console.log(event);7const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');8const event = createAndAccumulateChangeEvent('request', 'request', {});9console.log(event);10const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');11const event = createAndAccumulateChangeEvent('request', 'request', {});12console.log(event);13const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');14const event = createAndAccumulateChangeEvent('request', 'request', {});15console.log(event);16const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​chromium/​crNetworkManager');17const event = createAndAccumulateChangeEvent('request', 'request', {});18console.log(event);

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require("@playwright/​test/​lib/​utils/​recorderEvents");2const event = createAndAccumulateChangeEvent("click", "button", "Click Me", "css=button");3console.log(event);4const { test } = require("@playwright/​test");5test("Click button", async ({ page }) => {6 await page.click("css=button");7});

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');2const events = [];3const event = createAndAccumulateChangeEvent(events, 'test', 'test');4event.data = { foo: 'bar' };5event.save();6console.log(events);7const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');8const events = [];9const event = createAndAccumulateChangeEvent(events, 'test', 'test');10event.data = { foo: 'bar' };11event.save();12console.log(events);13const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');14const events = [];15const event = createAndAccumulateChangeEvent(events, 'test', 'test');16event.data = { foo: 'bar' };17event.save();18console.log(events);19const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');20const events = [];21const event = createAndAccumulateChangeEvent(events, 'test', 'test');22event.data = { foo: 'bar' };23event.save();24console.log(events);25const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');26const events = [];27const event = createAndAccumulateChangeEvent(events, 'test', 'test');28event.data = { foo: 'bar' };29event.save();30console.log(events);31const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');32const events = [];33const event = createAndAccumulateChangeEvent(events, 'test', 'test');34event.data = { foo: 'bar' };35event.save();36console.log(events);37const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');38const events = [];39const event = createAndAccumulateChangeEvent(events, 'test', 'test');40event.data = { foo: 'bar' };41event.save();42console.log(events);43const { createAndAccumulateChangeEvent } = require('@playwright/​test/​lib/​server/​events');44const events = [];45const event = createAndAccumulateChangeEvent(events

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Using AI Code Generation

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1const { createAndAccumulateChangeEvent } = require('playwright/​lib/​server/​trace/​recorder/​events');2const event = createAndAccumulateChangeEvent({3 data: {4 attributes: {5 },6 rect: {7 },8 boundingBox: {9 },10 },11});12console.log(event);13[Apache 2.0](LICENSE)

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StackOverFlow community discussions

Questions
Discussion

Jest + Playwright - Test callbacks of event-based DOM library

firefox browser does not start in playwright

Is it possible to get the selector from a locator object in playwright?

How to run a list of test suites in a single file concurrently in jest?

Running Playwright in Azure Function

firefox browser does not start in playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})
https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

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