custom-element

问题 I just ran into an interesting situation where I have a submit <button> inside the shadowDOM of a native custom element that is placed inside a <form> . <form id="one" action="" method="get"> <s-button>Select</s-button> #shadow-root <button>...</button> <button>Outside</button> </form> I also have a <button> as a direct child of the <form> . The child <button> causes the form to submit. But the <button> in the shadow-root does not. In a way I guess this makes sense. But has anyone figured out

问题 I just ran into an interesting situation where I have a submit <button> inside the shadowDOM of a native custom element that is placed inside a <form> . <form id="one" action="" method="get"> <s-button>Select</s-button> #shadow-root <button>...</button> <button>Outside</button> </form> I also have a <button> as a direct child of the <form> . The child <button> causes the form to submit. But the <button> in the shadow-root does not. In a way I guess this makes sense. But has anyone figured out

问题 I just ran into an interesting situation where I have a submit <button> inside the shadowDOM of a native custom element that is placed inside a <form> . <form id="one" action="" method="get"> <s-button>Select</s-button> #shadow-root <button>...</button> <button>Outside</button> </form> I also have a <button> as a direct child of the <form> . The child <button> causes the form to submit. But the <button> in the shadow-root does not. In a way I guess this makes sense. But has anyone figured out

来源： https://stackoverflow.com/questions/57460177/how-to-import-css-file-content-into-a-javascript-variable

来源： https://stackoverflow.com/questions/63380357/how-can-i-do-a-default-export-for-a-custom-element-created-with-angular

来源： https://stackoverflow.com/questions/63380357/how-can-i-do-a-default-export-for-a-custom-element-created-with-angular

来源： https://stackoverflow.com/questions/62002367/getting-error-while-creating-a-custom-element-which-extends-svgcircleelement

来源： https://stackoverflow.com/questions/60706702/applying-focus-css-to-input-field-in-shadowdom-and-focus-css-to-shadow-host

问题 Bitten again by this Chrome Element upgrade issue, after spending a week in FireFox. Forgot to wrap code in a setTimeout before delivering to Chromium browsers. FireFox prints: ABCD Chromium prints: ADCD Question: Why the difference? <script> customElements.define('my-element', class extends HTMLElement { connectedCallback() { console.log(this.innerHTML);// "A" in FireFox, "" in other Browsers if (this.innerHTML == "A") this.innerHTML = this.innerHTML + "B"; else setTimeout(() => this

问题 The CSS ::slotted selector selects children of the <slot> element. however, when trying to select grandchildren like with ::slotted(*) , ::slotted(*) * , or ::slotted(* *) , the selector doesn't seem to take effect. class MyElement extends HTMLElement { constructor() { super(); const shadowRoot = this.attachShadow({mode: 'open'}) shadowRoot.innerHTML = ` <style> ::slotted(*) { display: block; border: solid blue 1px; padding: 3px; } ::slotted(*) span { display: block; border: solid red 1px;