Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! 
How to use instantiateReactComponent method in Playwright Internal
Best JavaScript code snippet using playwright-internal
json-mount.js
Source:json-mount.js 
...119};120var ReactMount = {121 render: function(element) {122 var stream = new TreeStream();123 var component = instantiateReactComponent(element);124 var rootId = register(stream, component);125 ReactUpdates.batchedUpdates(mountComponent, component, rootId, stream, false);126 return stream;127 },128 unmountComponentAtNode: function(stream) {129 var rootId = first(getRootIds(stream));130 var component = components[rootId];131 if (!component) {132 return false;133 }134 ReactUpdates.batchedUpdates(unmountComponent, rootId, component, stream);135 stream.writeTree(null);136 return true;137 },...
instantiateReactComponent.js
Source:instantiateReactComponent.js
...20 }21 function isInternalComponentType(type) {22 return typeof type === 'function' && typeof type.prototype !== 'undefined' && typeof type.prototype.mountComponent === 'function' && typeof type.prototype.receiveComponent === 'function';23 }24 function instantiateReactComponent(node) {25 var instance;26 if (node === null || node === false) {27 instance = new ReactEmptyComponent(instantiateReactComponent);28 } else if (typeof node === 'object') {29 var element = node;30 !(element && (typeof element.type === 'function' || typeof element.type === 'string')) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Element type is invalid: expected a string (for built-in components) ' + 'or a class/function (for composite components) but got: %s.%s', element.type == null ? element.type : typeof element.type, getDeclarationErrorAddendum(element._owner)) : invariant(false) : undefined;31 if (typeof element.type === 'string') {32 instance = ReactNativeComponent.createInternalComponent(element);33 } else if (isInternalComponentType(element.type)) {34 instance = new element.type(element);35 } else {36 instance = new ReactCompositeComponentWrapper();37 }38 } else if (typeof node === 'string' || typeof node === 'number') {...
636abfinstantiateReactComponent.js
Source:636abfinstantiateReactComponent.js
...22function isInternalComponentType(type) {23 return typeof type === 'function' && typeof type.prototype !== 'undefined' && typeof type.prototype.mountComponent === 'function' && typeof type.prototype.receiveComponent === 'function';24}25var nextDebugID = 1;26function instantiateReactComponent(node, shouldHaveDebugID) {27 var instance;28 if (node === null || node === false) {29 instance = ReactEmptyComponent.create(instantiateReactComponent);30 } else if (typeof node === 'object') {31 var element = node;32 invariant(element && (typeof element.type === 'function' || typeof element.type === 'string'), 'Element type is invalid: expected a string (for built-in components) ' + 'or a class/function (for composite components) but got: %s.%s', element.type == null ? element.type : typeof element.type, getDeclarationErrorAddendum(element._owner));33 if (typeof element.type === 'string') {34 instance = ReactHostComponent.createInternalComponent(element);35 } else if (isInternalComponentType(element.type)) {36 instance = new element.type(element);37 if (!instance.getHostNode) {38 instance.getHostNode = instance.getNativeNode;39 }40 } else {...
ReactChildReconciler.js
Source:ReactChildReconciler.js
...11 if (process.env.NODE_ENV !== 'production') {12 process.env.NODE_ENV !== 'production' ? warning(keyUnique, 'flattenChildren(...): Encountered two children with the same key, ' + '`%s`. Child keys must be unique; when two children share a key, only ' + 'the first child will be used.', name) : undefined;13 }14 if (child != null && keyUnique) {15 childInstances[name] = instantiateReactComponent(child, null);16 }17 }18 var ReactChildReconciler = {19 instantiateChildren: function(nestedChildNodes, transaction, context) {20 if (nestedChildNodes == null) {21 return null;22 }23 var childInstances = {};24 traverseAllChildren(nestedChildNodes, instantiateChild, childInstances);25 return childInstances;26 },27 updateChildren: function(prevChildren, nextChildren, transaction, context) {28 if (!nextChildren && !prevChildren) {29 return null;30 }31 var name;32 for (name in nextChildren) {33 if (!nextChildren.hasOwnProperty(name)) {34 continue;35 }36 var prevChild = prevChildren && prevChildren[name];37 var prevElement = prevChild && prevChild._currentElement;38 var nextElement = nextChildren[name];39 if (prevChild != null && shouldUpdateReactComponent(prevElement, nextElement)) {40 ReactReconciler.receiveComponent(prevChild, nextElement, transaction, context);41 nextChildren[name] = prevChild;42 } else {43 if (prevChild) {44 ReactReconciler.unmountComponent(prevChild, name);45 }46 var nextChildInstance = instantiateReactComponent(nextElement, null);47 nextChildren[name] = nextChildInstance;48 }49 }50 for (name in prevChildren) {51 if (prevChildren.hasOwnProperty(name) && !(nextChildren && nextChildren.hasOwnProperty(name))) {52 ReactReconciler.unmountComponent(prevChildren[name]);53 }54 }55 return nextChildren;56 },57 unmountChildren: function(renderedChildren) {58 for (var name in renderedChildren) {59 if (renderedChildren.hasOwnProperty(name)) {60 var renderedChild = renderedChildren[name];...
ReactServerRendering.js
Source:ReactServerRendering.js
...18 ReactUpdates.injection.injectBatchingStrategy(ReactServerBatchingStrategy);19 var id = ReactInstanceHandles.createReactRootID();20 transaction = ReactServerRenderingTransaction.getPooled(false);21 return transaction.perform(function() {22 var componentInstance = instantiateReactComponent(element, null);23 var markup = componentInstance.mountComponent(id, transaction, emptyObject);24 return ReactMarkupChecksum.addChecksumToMarkup(markup);25 }, null);26 } finally {27 ReactServerRenderingTransaction.release(transaction);28 ReactUpdates.injection.injectBatchingStrategy(ReactDefaultBatchingStrategy);29 }30 }31 function renderToStaticMarkup(element) {32 !ReactElement.isValidElement(element) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'renderToStaticMarkup(): You must pass a valid ReactElement.') : invariant(false) : undefined;33 var transaction;34 try {35 ReactUpdates.injection.injectBatchingStrategy(ReactServerBatchingStrategy);36 var id = ReactInstanceHandles.createReactRootID();37 transaction = ReactServerRenderingTransaction.getPooled(true);38 return transaction.perform(function() {39 var componentInstance = instantiateReactComponent(element, null);40 return componentInstance.mountComponent(id, transaction, emptyObject);41 }, null);42 } finally {43 ReactServerRenderingTransaction.release(transaction);44 ReactUpdates.injection.injectBatchingStrategy(ReactDefaultBatchingStrategy);45 }46 }47 module.exports = {48 renderToString: renderToString,49 renderToStaticMarkup: renderToStaticMarkup50 };...
FeactCompositeComponentWrapper.js
Source:FeactCompositeComponentWrapper.js
...18 return markUp;19 }20 performInitialMount(container) {21 const renderedElement = this._instance.render();22 const child = instantiateReactComponent(renderedElement);23 this._renderedComponent = child;24 return ReactReconciler.mountComponent(child, container);25 }26}27export const ReactReconciler = {28 mountComponent(internalInstance, container) {29 return internalInstance.mountComponent(container);30 }31};32function instantiateReactComponent(element) {33 console.log(element)34 if (typeof element.type === 'string') {35 return new ReactDOMComponent(element);36 } else if (typeof element.type === 'function') {37 return new ReactCompositeComponentWrapper(element);38 }...
core.js
Source:core.js
...7var instantiateReactComponent = require('react/lib/instantiateReactComponent');8module.exports.rootID = ReactInstanceHandles.createReactRootID();9module.exports.transaction = ReactUpdates.ReactReconcileTransaction.getPooled();10module.exports.render = function (pixiElement) {11 var component = instantiateReactComponent(pixiElement),12 instance;13 if (ReactElement.isValidElement(pixiElement)) {14 module.exports.transaction.perform(function () {15 instance = component.mountComponent(module.exports.rootID, module.exports.transaction, {});16 instance.isRootLibertyNode = true;17 });18 return instance;19 } else {20 console.log('ReactLiberty.render: Passed element is not a valid ReactElement');21 }...
ReactTitanium.js
Source:ReactTitanium.js
...12 'render(): You must pass a valid ReactElement.'13 );14 const id = ReactInstanceHandles.createReactRootID();15 const transaction = ReactUpdates.ReactReconcileTransaction.getPooled();16 const component = instantiateReactComponent(element);17 transaction.perform(() => {18 component.mountComponent(id, transaction, {});19 });20 return component;...
Using AI Code Generation
1const { instantiateReactComponent } = require('playwright/lib/server/instantiateReactComponent');2const { React } = require('playwright/lib/server/react');3const { ReactServerAgent } = require('playwright/lib/server/reactServerAgent');4const agent = new ReactServerAgent();5const react = new React({ agent });6const ReactComponent = require('path/to/ReactComponent');7const component = new ReactComponent({});
Using AI Code Generation
1const { instantiateReactComponent } = require('@playwright/test/lib/server/instantiateReactComponent');2const { React } = require('@playwright/test/lib/server/react');3const { ReactServerAgent } = require('@playwright/test/lib/server/reactServerAgent');4const { instantiateReactComponent } = require('@playwright/test/lib/server/instantiateReactComponent');5const { React } = require('@playwright/test/lib/server/react');6const { ReactServerAgent } = require('@playwright/test/lib/server/reactServerAgent');7const { Page } = require('@playwright/test/lib/server/page');8const { PageDispatcher } = require('@playwright/test/lib/server/pageDispatcher');9const { FrameDispatcher } = require('@playwright/test/lib/server/frameDispatcher');10const { Frame } = require('@playwright/test/lib/server/frame');11const { FrameTree } = require('@playwright/test/lib/server/frameTree');12const { FrameManager } = require('@playwright/test/lib/server/frameManager');13const { FrameSnapshot } = require('@playwright/test/lib/server/frameSnapshot');14const { FrameSnapshotLoader } = require('@playwright/test/lib/server/frameSnapshotLoader');15const { FrameSnapshotReader } = require('@playwright/test/lib/server/frameSnapshotReader');16const { FrameSnapshotWriter } = require('@playwright/test/lib/server/frameSnapshotWriter');17const { FrameWaiter } = require('@playwright/test/lib/server/frameWaiter');18const { Keyboard } = require('@playwright/test/lib/server/keyboard');19const { Mouse } = require('@playwright/test/lib/server/mouse');20const { Accessibility } = require('@playwright/test/lib/server/accessibility');21const { Touchscreen } = require('@playwright/test/lib/server/touchscreen');22const { Tracing } = require('@playwright/test/lib/server/tracing');23const { WorkerDispatcher } = require('@playwright/test/lib/server/workerDispatcher');24const { Worker } = require('@playwright/test/lib/server/worker');25const { WorkerManager } = require('@playwright/test/lib/server/workerManager');26const { ConsoleMessageDispatcher } = require('@playwright/test/lib/server/consoleMessageDispatcher');27const { ConsoleMessage } = require('@playwright/test/lib/server/consoleMessage');28const { DialogDispatcher } = require('@playwright/test/lib/server/dialogDispatcher');29const { Dialog } = require('@playwright/test/lib/server/dialog');30const { DownloadDispatcher } = require('@playwright/test/lib
Using AI Code Generation
1const { instantiateReactComponent } = require('@playwright/test/lib/server/instrumented');2const { React } = require('@playwright/test/lib/server/instrumented');3const { ReactTestRenderer } = require('@playwright/test/lib/server/instrumented');4const reactElement = React.createElement('div', { 'data-testid': 'test' }, 'Hello World');5const component = instantiateReactComponent(reactElement);6const testRenderer = ReactTestRenderer.create(reactElement);7const testInstance = testRenderer.root;8const testInstanceJSON = testInstance.toJSON();9console.log(component);10console.log(testInstanceJSON);
Using AI Code Generation
1const { instantiateReactComponent } = require('playwright/lib/server/instantiateReactComponent');2const { React } = require('playwright/lib/server/instantiateReactComponent');3const { instantiateReactDOM } = require('playwright/lib/server/instantiateReactDOM');4const { ReactDOM } = require('playwright/lib/server/instantiateReactDOM');5const { instantiateReactTestRenderer } = require('playwright/lib/server/instantiateReactTestRenderer');6const { ReactTestRenderer } = require('playwright/lib/server/instantiateReactTestRenderer');7const { instantiateVue } = require('playwright/lib/server/instantiateVue');8const { Vue } = require('playwright/lib/server/instantiateVue');9const { instantiateAngular } = require('playwright/lib/server/instantiateAngular');10const { Angular } = require('playwright/lib/server/instantiateAngular');11const { instantiateSvelte } = require('playwright/lib/server/instantiateSvelte');12const { Svelte } = require('playwright/lib/server/instantiateSvelte');13const { instantiatePreact } = require('playwright/lib/server/instantiatePreact');14const { Preact } = require('playwright/lib/server/instantiatePreact');15const { instantiateLitHtml } = require('playwright/lib/server/instantiateLitHtml');16const { LitHtml } = require('playwright/lib/server/instantiateLitHtml');17const { instantiateEmber } = require('playwright/lib/server/instantiateEmber');18const { Ember } = require('playwright/lib/server/instantiateEmber');19const { instantiateMithril } = require('playwright/lib/server/instantiateMithril');20const { Mithril } = require('playwright/lib/server/instantiateMithril');21const { instantiateMarko } = require('playwright/lib/server/instantiateMarko');22const { Marko } = require
Using AI Code Generation
1const { instantiateReactComponent } = require('playwright/lib/server/react');2const React = require('react');3const ReactDOM = require('react-dom');4const { render } = require('react-dom');5const { createElement } = require('react');6const App = () => {7 return createElement('div', null, 'Hello World');8};9const { root, dispose } = instantiateReactComponent(App);10render(root, document.body);11dispose();12const { instantiateReactComponent } = require('playwright/lib/server/react');13const React = require('react');14const ReactDOM = require('react-dom');15const { render } = require('react-dom');16const { createElement } = require('react');17const App = () => {18 return createElement('div', null, 'Hello World');19};20const { root, dispose } = instantiateReactComponent(App);21render(root, document.body);22dispose();23const { instantiateReactComponent } = require('playwright/lib/server/react');24const React = require('react');25const ReactDOM = require('react-dom');26const { render } = require('react-dom');27const { createElement } = require('react');28const App = () => {29 return createElement('div', null, 'Hello World');30};31const { root, dispose } = instantiateReactComponent(App);32render(root, document.body);33dispose();34const { instantiateReactComponent } = require('playwright/lib/server/react');35const React = require('react');36const ReactDOM = require('react-dom');37const { render } = require('react-dom');38const { createElement } = require('react');39const App = () => {40 return createElement('div', null, 'Hello World');41};42const { root, dispose } = instantiateReactComponent(App);43render(root, document.body);44dispose();45const { instantiateReactComponent } = require('playwright/lib/server/react');46const React = require('react');47const ReactDOM = require('react-dom');48const { render } = require('react-dom');49const { createElement } = require('react');50const App = () => {51 return createElement('div', null, 'Hello World');52};53const { root, dispose } = instantiateReact
Using AI Code Generation
1const { instantiateReactComponent } = require('playwright/lib/server/instantiateReactComponent');2const { React } = require('playwright/lib/server/instantiateReactComponent');3const { ReactTestRenderer } = require('playwright/lib/server/instantiateReactComponent');4const { ReactTestInstance } = require('playwright/lib/server/instantiateReactComponent');5const { ReactTestTextInstance } = require('playwright/lib/server/instantiateReactComponent');6const { ReactTestComponent } = require('playwright/lib/server/instantiateReactComponent');7const { ReactTestHostComponent } = require('playwright/lib/server/instantiateReactComponent');8const { ReactTestHostRoot } = require('playwright/lib/server/instantiateReactComponent');9const { instantiateReactComponent } = require('playwright/lib/server/instantiateReactComponent');10const { React } = require('playwright/lib/server/instantiateReactComponent');11const { ReactTestRenderer } = require('playwright/lib/server/instantiateReactComponent');12const { ReactTestInstance } = require('playwright/lib/server/instantiateReactComponent');13const { ReactTestTextInstance } = require('playwright/lib/server/instantiateReactComponent');14const { ReactTestComponent } = require('playwright/lib/server/instantiateReactComponent');15const { ReactTestHostComponent } = require('playwright/lib/server/instantiateReactComponent');16const { ReactTestHostRoot } = require('playwright/lib/server/instantiateReactComponent');17const { instantiateReactComponent } = require('playwright/lib/server/instantiateReactComponent');18const { React } = require('playwright/lib/server/instantiateReactComponent');19const { ReactTestRenderer } = require('playwright/lib/server/instantiateReactComponent');20const { ReactTestInstance } = require('playwright/lib/server/instantiateReactComponent');21const { ReactTestTextInstance } = require('playwright/lib/server/instantiateReactComponent');22const { ReactTestComponent } = require('playwright/lib/server/instantiateReactComponent');23const { ReactTestHostComponent } = require('playwright/lib/server/instantiateReactComponent');24const { ReactTestHostRoot } = require('playwright/lib/server/instantiateReactComponent');
Using AI Code Generation
1const { instantiateReactComponent } = require('playwright/lib/instrumentation');2const React = require('react');3const ReactDOM = require('react-dom');4const App = ({name}) => {5 return <h1>Hello {name}</h1>;6};7const container = document.getElementById('root');8ReactDOM.render(React.createElement(App, {name: 'World'}), container);9instantiateReactComponent(container);10const { ReactSelector } = require('playwright-react-selector');11const { chromium } = require('playwright');12(async () => {13 const browser = await chromium.launch();14 const context = await browser.newContext();15 const page = await context.newPage();16 console.log(await ReactSelector('App').exists());17 await browser.close();18})();
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:
- 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.
- 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.
- 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.
- 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.
- Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.
Run Playwright Internal automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
