I want to create a Web Component. I use a ShadowDom and after generating a list I want to add a click Event to each element of the list. But I wonder how to access the list. Neither the document nor the template shows me the items after a querySelect. My question: How can I access the generated list within
Tag: shadow-dom
How to avoid repetition of CSS properties across multiple Web Components
I’m building with Web Component without any 3rd-party framework. And I have vanilla <button> in several of my components, and I have to reset EVERY ONE of them before I do my custom styling on them because resetting it once at a root level doesn’t work since the properties involved are not o…
open the “closed” shadowRoot of element inserted by other extension in chrome
well google translate extension in chrome, has popup feature, it displays translation of selected word instantly, I wanted to access those translations displayed by popup, but this popup element is shadowRoot(“closed”), so javascript cant access its content, I red an article about that subject and…
child elements usage in shadow dom
Is there any constraint that’s preventing <thead>, <tbody>, <tr> and so on to be slotted in shadow DOM? Given the following example: renders into the following structure: The workaround would be to use templates and insert template content with JS in slotchange event handler, but I wou…
Detect attachShadow event
I’d like to detect an event of attaching shadow to the host element. Use-case: using MutationObserver to watch any DOM changes and post-process the changed content as part of binding (tying) framework’s logic. Why do I need to detect this event? In order to be able to watch for a changes within th…
MutationObserver and Shadow DOM
I’m using Polymer’s ShadowDOM and MutationObserver polyfills and need to: Detect when a HTMLCanvasElement is inserted so that I can perform layout (its width and height are undetermined through offsetWidth / offsetHeight when detached from the DOM tree) Detect when the element is removed so I can …