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x/lume/plugins/jsx_preact.ts

🔥 Static site generator for Deno 🦕
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import { preact, renderToString } from "../deps/preact.ts";import loader from "../core/loaders/module.ts";import { merge } from "../core/utils.ts";
import type { Data, DenoConfigResult, Engine, Helper, Site } from "../core.ts";
export interface Options { /** The list of extensions this plugin applies to */ extensions: string[] | { pages: string[]; components: string[]; };}
// Default optionsexport const defaults: Options = { extensions: [".jsx", ".tsx"],};
// JSX children typeexport type Children = preact.ComponentChildren;
/** Template engine to render JSX files using Preact */export class PreactJsxEngine implements Engine { helpers: Record<string, Helper> = {}; basePath: string;
constructor(basePath: string) { this.basePath = basePath; }
deleteCache() {}
async render(content: unknown, data: Data = {}) { // The content is a string, so we have to convert it to a Preact element if (typeof content === "string") { content = preact.h("div", { dangerouslySetInnerHTML: { __html: content }, }); }
// Create the children property let children = data.content;
// If the children is a string, convert it to a Preact element if (typeof children === "string") { children = preact.h("div", { dangerouslySetInnerHTML: { __html: children }, }); }
const element = typeof content === "object" && preact.isValidElement(content) ? content : (typeof content === "function" ? await content({ ...data, children }, this.helpers) : content) as preact.VNode;
if (element && typeof element === "object") { element.toString = () => renderToString(element); }
return element; }
renderSync(content: unknown, data: Data = {}): string { const element = typeof content === "function" ? content(data, this.helpers) : content;
if (element && typeof element === "object") { element.toString = () => renderToString(element); }
return element; }
addHelper(name: string, fn: Helper) { this.helpers[name] = fn; }}
/** Configure this plugin on "lume init" */export function init(denoConfig: DenoConfigResult) { denoConfig.config.compilerOptions ||= {}; denoConfig.config.compilerOptions.jsx = "react-jsx"; denoConfig.config.compilerOptions.jsxImportSource = "npm:preact";}
/** Register the plugin to support JSX and TSX files */export default function (userOptions?: Partial<Options>) { const options = merge(defaults, userOptions); const extensions = Array.isArray(options.extensions) ? { pages: options.extensions, components: options.extensions } : options.extensions;
return (site: Site) => { const engine = new PreactJsxEngine(site.src());
site.loadPages(extensions.pages, loader, engine); site.loadComponents(extensions.components, loader, engine); };}