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* expose dom shim from package root * ensure DOM updates are made synchronously * upgrade lit to use latest dom shim * fleshing out dom-shim with foundation-element requirements * fix root <template> behavior to be more durable to formatting * implement classList binding for native elements * enables style retrevial for a custom element through SSR style-strategy * clean up exports * add tagName to elements created by ElementRenderer to be used by componentPresentation * prettier Co-authored-by: nicholasrice <[email protected]>
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May 31, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,24 +1,151 @@ | ||
| import { installWindowOnGlobal } from "@lit-labs/ssr/lib/dom-shim.js"; | ||
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| installWindowOnGlobal(); | ||
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| // Implement shadowRoot getter on HTMLElement. | ||
| // Can be removed if https://github.com/lit/lit/issues/2652 | ||
| // is integrated. | ||
| class PatchedHTMLElement extends HTMLElement { | ||
| #shadowRoot: ShadowRoot | null = null; | ||
| get shadowRoot() { | ||
| class DOMTokenList { | ||
| #tokens = new Set<string>(); | ||
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| public add(value: string) { | ||
| this.#tokens.add(value); | ||
| } | ||
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| public remove(value: string) { | ||
| this.#tokens.delete(value); | ||
| } | ||
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| public contains(value: string) { | ||
| return this.#tokens.has(value); | ||
| } | ||
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| public toggle(value: string, force?: boolean) { | ||
| const add = force === undefined ? !this.contains(value) : force; | ||
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| if (add) { | ||
| this.add(value); | ||
| return true; | ||
| } else { | ||
| this.remove(value); | ||
| return false; | ||
| } | ||
| } | ||
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| public toString() { | ||
| return Array.from(this.#tokens).join(" "); | ||
| } | ||
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| *[Symbol.iterator]() { | ||
| yield* this.#tokens.values(); | ||
| } | ||
| } | ||
| class Node { | ||
| appendChild() {} | ||
| removeChild() {} | ||
| } | ||
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| class Element extends Node {} | ||
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| abstract class HTMLElement extends Element { | ||
| #attributes = new Map<string, string | DOMTokenList>(); | ||
| #shadowRoot: null | ShadowRoot = null; | ||
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| public readonly classList = new DOMTokenList(); | ||
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| public get attributes(): { name: string; value: string }[] { | ||
| return Array.from(this.#attributes).map(([name, value]) => { | ||
| if (typeof value === "string") { | ||
| return { name, value }; | ||
| } else { | ||
| return { name, value: value.toString() }; | ||
| } | ||
| }); | ||
| } | ||
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| public get shadowRoot() { | ||
| return this.#shadowRoot; | ||
| } | ||
| attachShadow(init: ShadowRootInit) { | ||
| const root = super.attachShadow(init); | ||
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| if (init.mode === "open") { | ||
| this.#shadowRoot = root; | ||
| public abstract attributeChangedCallback?( | ||
| name: string, | ||
| old: string | null, | ||
| value: string | null | ||
| ): void; | ||
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| public setAttribute(name: string, value: string) { | ||
| let _value: string | DOMTokenList = value; | ||
| if (name === "class") { | ||
| _value = new DOMTokenList(); | ||
| value.split(" ").forEach(className => { | ||
| (_value as DOMTokenList).add(className); | ||
| }); | ||
| } | ||
| this.#attributes.set(name, _value); | ||
| } | ||
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| public removeAttribute(name: string) { | ||
| this.#attributes.delete(name); | ||
| } | ||
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| public hasAttribute(name: string) { | ||
| return this.#attributes.has(name); | ||
| } | ||
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| public attachShadow(init: ShadowRootInit) { | ||
| const shadowRoot = ({ host: this } as unknown) as ShadowRoot; | ||
| if (init && init.mode === "open") { | ||
| this.#shadowRoot = shadowRoot; | ||
| } | ||
| return shadowRoot; | ||
| } | ||
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| public getAttribute(name: string) { | ||
| const value = this.#attributes.get(name); | ||
| return value === undefined | ||
| ? null | ||
| : value instanceof DOMTokenList | ||
| ? value.toString() | ||
| : value; | ||
| } | ||
| } | ||
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| return root; | ||
| class Document { | ||
| head = new Node(); | ||
| adoptedStyleSheets = []; | ||
| createTreeWalker() { | ||
| return {}; | ||
| } | ||
| createTextNode() { | ||
| return {}; | ||
| } | ||
| createElement(tagName: string) { | ||
| return { tagName }; | ||
| } | ||
| querySelector() { | ||
| return undefined; | ||
| } | ||
| addEventListener() {} | ||
| } | ||
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| class CSSStyleDeclaration { | ||
| setProperty() {} | ||
| } | ||
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| window.HTMLElement = PatchedHTMLElement; | ||
| class CSSStyleSheet { | ||
| get cssRules() { | ||
| return [{ style: new CSSStyleDeclaration() }]; | ||
| } | ||
| replace() {} | ||
| insertRule() { | ||
| return 0; | ||
| } | ||
| } | ||
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| class MediaQueryList { | ||
| addListener() {} | ||
| matches = false; | ||
| } | ||
| installWindowOnGlobal({ | ||
| matchMedia: () => new MediaQueryList(), | ||
| HTMLElement, | ||
| Document, | ||
| document: new Document(), | ||
| Node, | ||
| CSSStyleSheet, | ||
| }); |
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36 changes: 34 additions & 2 deletions
36
packages/web-components/fast-ssr/src/element-renderer/style-strategy.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,37 @@ | ||
| import { StyleStrategy } from "@microsoft/fast-element"; | ||
| import { StyleStrategy, StyleTarget } from "@microsoft/fast-element"; | ||
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| const sheetsForElement = new WeakMap<Element, Set<string | CSSStyleSheet>>(); | ||
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| function getOrCreateFor(target: Element): Set<string | CSSStyleSheet> { | ||
| let set = sheetsForElement.get(target); | ||
| if (set) { | ||
| return set; | ||
| } | ||
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| set = new Set<string | CSSStyleSheet>(); | ||
| sheetsForElement.set(target, set); | ||
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| return set; | ||
| } | ||
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| function isShadowRoot(target: any): target is ShadowRoot { | ||
| return !!target.host; | ||
| } | ||
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| export class FASTSSRStyleStrategy implements StyleStrategy { | ||
| addStylesTo() {} | ||
| addStylesTo(target: StyleTarget) { | ||
| if (isShadowRoot(target)) { | ||
| const cache = getOrCreateFor(target.host); | ||
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| this.styles.forEach(style => cache?.add(style)); | ||
| } | ||
| } | ||
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| removeStylesFrom() {} | ||
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| constructor(private styles: (string | CSSStyleSheet)[]) {} | ||
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| public static getStylesFor(target: Element): Set<string | CSSStyleSheet> | null { | ||
| return sheetsForElement.get(target) || null; | ||
| } | ||
| } |
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