At my workplace some web pages have suddenly started to malfunction a few days ago (lots of elements are not showing anymore in the pages.). I inspect ...

I have been referencing the Home Assistant project's use of Polymer app-layout elements with the Lit library. The issue I am having is that I cannot g ...

I'm working in a project which uses Polymer (still on 1.7, we'll relaunch using a different technology instead of upgrading...) and I'm supposed to ch ...

So I tried to use document.querySelector('.d2l-contextmenu-ph').attr("aria-expanded","true"); to basically click the button "hh" button. It doesnt wor ...

I have a javascript function defined in polymer as such: myTest(arg) {<do stuff here>} Inside this function, based on some conditions, I want t ...

Trying to use lit element/Polymer Web components AND an Audioworklet/AudioWorklet processor, I got this error: at this line in my code: The boot ...

I get electron-quick-start and electron-polymer from fluidnext to use for my Polymer 3 application. When i try to import my webcomponents to the proj ...

I want to use a java-script method in a polymer Template. I am using Vaadin with Polymer Elements. In my Project I have a Vaadin-Grid of Objects that ...

I have 100 polymers and I want to compare their solubility by their fingerprint. By using rdkit I reach a list of bits for each polymer l ...

I need to add a FeatureGroup to the overlays list. I do add some overlays when instantiating the Leaflet map, but I now need to append a FeatureGroup ...

I have a web component (Polymer 3) that is embedded in other components and want to "sense" clicks outside of it. For example, in React I would do som ...

My working environment is Python, Chrome, Selenium I want to edit shadow-root (user-agent)'s value If I'm using js's .getAttribute(), with input's ...

I have been using Stripe for my lit element project. The mounting the card element doesn't works at all. Here is my code sample that I am using Eve ...

I am trying to design web components using lit Element and I need an help regarding the events. As we can see from the attached snippet we could use @ ...

I am using vaadin flow v21. I like to create a custom component which is using an own svg icon set. I tried to create the set based on the vaadin-icon ...

I try to implement a search bar in a project. It should just search for the entries and hide the rows, when the input doesn't match. This is what I di ...

I'm trying to use Material Custom Component and also using some other components. But I have version conflict Uncaught DOMException. Uncaught DOME ...

I am trying to integrate Braintree payment gateway to Vaadin 14 which is using Polymer for its frontend. Basically we have a custom Vaadin front-end ...

I try to import a lit component in my NextJS project. Here is my component: import {html, css, LitElement} from 'lit'; import {customElement} from ' ...

My extended LitElement class has variable members, the values of which could be changed at any time. The rendering depends on several of them. I'd lik ...