I have a custom element that displays a message inside three nested divs: It works, but I’m not happy with having all of the HTML markup inside of strings. I want to separate the HTML markup from the JavaScript, preferably in a separate file so that my IDE can give me better support. Here’s an exa…
Tag: web-component
Adding an event within a WebComponent
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
How do I implement Coloris npm package as a custom element?
I have been trying to implement an NPM called Coloris, to provide end-user color customization capability to a Wix website through a web component. From what I can see, the javascript isn’t working/executing. I’ve tried a few solutions for getting javascript to work in innerHTML, but they haven…
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…
Why does customElements.upgrade appear to not upgrade this custom element?
I have a situation similar to the example below: from a template element, I clone a node tree containing custom elements. One custom element is passed data during initialization, represented here by the line infobox.setData(getData()). The function I use to pass the data (setData) is added by my custom class,…
Why I can not call method of WebComponent?
I wonder why I cannot call a method defined in web-component if I attached this component via .append instead of using tag name inside the template. Below I am providing few examples. One is not working(throwing an error). I wonder why this first example is throwing this error. Example 1 In this example, I am…
JavaScript: refer to anonymous class static variable
Following this google tutorial on web components, and I like the way the author uses an anonymous class in the customElements.define function call, as it avoids even more brackets when creating an immediately invoked function call. I am using a static class variable to store the template element, so it’…
Generate appropriate Angular Element dynamically without bloating the build size?
Summary: When createCustomElement() is called multiple times inside a switch case, all of the components will be included in the build, instead of just the one that will actually be used. This increases the build size with duplicate code. Details I have an Angular 11 app with a multi-site architecture. There …
WebComponent that extends HTMLButtonElement is not calling constructor() and connectedCallBack()
I’m trying to create a web component button but when I add it in HTML the constructor() function is never being called. I’m facing some problems: 1- The constructor() is not being called so my event listener is not being added to the element; 2- connectedCallback () lifecycle is not being called t…
Difference between HTML template content and innerHTML
Say I have an HTML <template> tag that I define and select as follows: What is the difference between these properties of the template: Answer Contrary to innerHTML, content returns a document fragment, and so you get immediate access to the DOM without an intermediate conversion to and from a string. H…