shadow-dom

How to handle the popup “Accepting all cookies” when the element is data-testid – Using Selenium in Python

The element Accept All is within #shadow-root (open). Solution To click on Accept All you have to use shadowRoot.querySelector() and you can use the following Locator Strategy: Code Block: driver.get(“https://www.kostal-solar-portal.com/#/”) time.sleep(5) element = driver.execute_script(“””return document.querySelector(‘#usercentrics-root’).shadowRoot.querySelector(“button[data-testid=’uc-accept-all-button’]”)”””) element.click() References You can find a couple of relevant discussions in: Can’t locate elments within shadow-root (open) using Python Selenium … Read more

Style html,body from web component (Angular 2)

You need to change the way your component serves css using ViewEncapsulation. By default it’s set to Emulated and angular will add an attribute containing surrogate id and pre-process the style rules To change this behavior import ViewEncapsulation from ‘angular2/core’ and use it in component’s metadata: @Component({ … encapsulation: ViewEncapsulation.None, … })

How to locate the First name field within shadow-root (open) within the website https://www.virustotal.com using Selenium and Python

The First name field within the website https://www.virustotal.com/gui/join-us is located deep within multiple #shadow-root (open). Solution To send a character sequence to the First name field you have to use shadowRoot.querySelector() and you can use the following Locator Strategy: Code Block: from selenium import webdriver import time options = webdriver.ChromeOptions() options.add_argument(“start-maximized”) options.add_experimental_option(“excludeSwitches”, [“enable-automation”]) options.add_experimental_option(‘useAutomationExtension’, False) … Read more

Render content between the component tags

Add <ng-content></ng-content> to the component’s template where the content should be projected: @Component({ selector: ‘app-demo’, template: ‘<div>{{title}}</div> <br> <ng-content></ng-content>’, }) export class DemoComponent { title=”Works!”; } Content to be projected: <app-demo>This is projected content!</app-demo> The output will be: Works! This is projected content! Here is a great article about Angular Content Projection (Angular 1 Transclusion): … Read more

Is Shadow DOM fast like Virtual DOM in React.js?

They are different things for different purposes, so comparing performance doesn’t make sense. Virtual DOM Virtual DOM is about avoiding unnecessary changes to the DOM, which are expensive performance-wise, because changes to the DOM usually cause re-rendering of the page. Virtual DOM also allows to collect several changes to be applied at once, so not … Read more

What is the ::content/::slotted pseudo-element and how does it work?

The ::content pseudo-element is being replaced in future implementations of Web Components / Shadow DOM with the ::slotted pseudo-element. Likewise, the element targeted by this pseudo-element has changed from <content to <slot> in the latest version of the Shadow DOM specification. You can see related discussion about that change here. Currently browsers still support <content> … Read more