shadow-dom
Shadow DOM styling from the outside
I did try many methods, including those described here. Since I’m using an external Web Component lib, I don’t have access to modify these components. So, the only solution that worked for me was using JS querySelector, like this: document.querySelector(“the-element.with-shadow-dom”) .shadowRoot.querySelector(“.some-selector”).setAttribute(“style”, “color: black”); Not the best solution, not suitable for large stylings, but does work … Read more
How to automate shadow DOM elements using selenium?
There is a very good plugin that can be used with selenium project shadow-automation-selenium. It helps in writing much better, readable and maintainable code. Using this you can access multi level of shadow DOM (up to 4 levels). This uses simple css selector to identify elements. WebElement findElement(String cssSelector) : use this method if want … Read more
Click event not firing when React Component in a Shadow DOM
As it turns out the Shadow DOM retargets click events and encapsulates the events in the shadow. React does not like this because they do not support Shadow DOM natively, so the event delegation is off and events are not being fired. What I decided to do was to rebind the event to the actual … Read more
How to listen for custom events defined web component
For others who end up here, the specific property you’re looking for to break out of the shadow root ‘jail’ is “composed”. So: this.checkEvent = new CustomEvent(“check”, { bubbles: true, cancelable: false, composed: true }); You can also add another property, “detail” which will carry custom data on the event, if you like. More info … Read more
What’s the substitute for ::shadow and /deep/?
::shadow and /deep/ were removed for breaking encapsulation. The substitutes are: CSS variables. It already works natively with the recently launched Google Chrome 49. Read here: http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom-201/ https://developers.google.com/web/updates/2016/02/css-variables-why-should-you-care?hl=en http://blog.chromium.org/2016/02/chrome-49-beta-css-custom-properties.html :host-context. Read here: http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom-201/
What is the difference between open and closed shadow DOM encapsulation mode?
With the open mode you can access the Shadow DOM via the shadowRoot property of the HTML element. With the closed mode you cannot. shadowRoot will return null. You can use both modes for you want to achieve. Here is a detailed explanation of the differences.
How can you make an iframe have pointer-events: none; but not on a div inside that?
What we want is not allowed by the spec, at least not with an absolutely positioned iframe. We’re all wanting to do the same thing: Render a container (typically for a Chrome extension), positioned over the page and filling the viewport Disallow not allow the container itself from capturing pointer events Allow the container’s children … Read more
::slotted CSS selector for nested children in shadowDOM slot [duplicate]
styling ::slotted elements in shadowDOM TL;DR ::slotted Specs: https://drafts.csswg.org/css-scoping/#slotted-pseudo slotted content remains in light DOM, is reflected to a <slot> in shadow DOM ::slotted(x) targets the lightDOM outer-Element (aka ‘skin’), NOT the SLOT in shadowDOM ::slotted(x) takes basic selectors Inheritable styles trickle into shadowDOM https://lamplightdev.com/blog/2019/03/26/why-is-my-web-component-inheriting-styles/ For the latest WHATWG discussion on SLOT and related topics, … Read more
How to create LitElement without Shadow DOM?
Just to make sure this question is shown as answered: createRenderRoot allows you to override the operation that creates a shadow root. It’s usually used to render to light dom: createRenderRoot() { return this; } Though it could be used to render somewhere else entirely. I really recommend using shadow DOM. Composition is difficult if … Read more