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| // hydrate.js | |
| function autoHydrate(Component, name) { | |
| if (isClient) { | |
| return Component; | |
| } | |
| return props => html` | |
| <component-root name=${name} /> | |
| <${Component} ...${props} /> | |
| <script | |
| type="text/hydration" | |
| dangerouslySetInnerHTML=${{ | |
| __html: JSON.stringify({ props }) | |
| }} | |
| /> | |
| `; | |
| } | |
| // componentMap.js | |
| import {autoHydrate} from './hydrate.js'; | |
| const COMPONENT_MAP = { | |
| Foo: () => import('./foo'), | |
| Baz: () => import ('./baz'), | |
| Bar: () => import('./bar'), | |
| }; | |
| const Chunk = {}; | |
| for (let i in COMPONENT_MAP) { | |
| Chunk[i] = autoHydrate(COMPONENT_MAP[i], i); | |
| } | |
| export {Chunk}; | |
| // page-map.js | |
| const COMPONENT_MAP = { | |
| {route: '/', components: [Foo], | |
| {route: '/about', components: [Foo, Baz], | |
| {route: '/work', components: [Foo,Bar], | |
| {route: '/lab', components: [Foo,Baz, Bar], | |
| } | |
| // main.js | |
| import { h, hydrate, render } from "preact"; | |
| import {AH} from './components/component-map'; | |
| import {whenVisible} from '../utils/when_visible'; | |
| class ComponentRoot extends HTMLElement { | |
| constructor() { | |
| super(); | |
| } | |
| connectedCallback() { | |
| const childNodes = []; | |
| let $end = this; | |
| let data = {}; | |
| whenVisible(this, () => { | |
| while (($end = $end.nextSibling)) { | |
| if ( | |
| $end.nodeName === "SCRIPT" && | |
| $end.getAttribute("type") === "text/hydration" | |
| ) { | |
| try { | |
| data = JSON.parse($end.textContent) || {}; | |
| } catch (e) {} | |
| break; | |
| } | |
| childNodes.push($end); | |
| } | |
| this.root = { | |
| childNodes, | |
| appendChild: c => this.parentNode.insertBefore(c, $end) | |
| }; | |
| Promise.resolve() | |
| .then(() => Chunk[this.getAttribute("name")]) | |
| .then(Component => { | |
| hydrate(h(Component, data.props), this.root); | |
| }); | |
| }); | |
| } | |
| disconnectedCallback() { | |
| render(null, this.root); | |
| } | |
| } | |
| customElements.define("component-root", ComponentRoot); | |
| // index.html | |
| <html> | |
| <body> | |
| <script src="main.js"></script> | |
| <script src="foo.js"></script> | |
| </body> | |
| </html> | |
| // work.html | |
| <html> | |
| <body> | |
| <script src="main.js"></script> | |
| <script src="foo.js"></script> | |
| <script src="bar.js"></script> | |
| </body> | |
| </html> | |
| // about.html | |
| <html> | |
| <body> | |
| <script src="main.js"></script> | |
| <script src="foo.js"></script> | |
| <script src="baz.js"></script> | |
| </body> | |
| </html> | |
| // lab.html | |
| <html> | |
| <body> | |
| <script src="main.js"></script> | |
| <script src="foo.js"></script> | |
| <script src="baz.js"></script> | |
| <script src="bar.js"></script> | |
| </body> | |
| </html> |
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