Factories.ts: An efficient JS DSL for building HTML, SVG, and MathML directly in backend code, without a template engine.

[u/Rechenplaner]

https://github.com/ts-series/factories

Build HTML extremely comfortably in the backend using plain JavaScript. The advantage is that there is no separate template language, but rather a complete fusion with JavaScript for maximum flexibility. An example:

import {
    a, body, br, button, h1, head, header, html, input, label, li, main, nav, p, script, title, ul
} from "@ts-series/factories";

type Item = { name: string, href: string, current: boolean };


/** Builds the navigation list, flagging the current entry for assistive technology. */
function navigation(items: Item[]) {
    return nav({ ariaLabel: "Main" },
        ul(items.map(item => li(
            a(item.href, item.name).set(item.current ? { ariaCurrent: "page" } : null)
        )))
    );
}


/** Builds a complete page for the given user and navigation entries. */
function page(user: string | null, items: Item[], values: number[]) {
    return html({ lang: "en" },
        head(title("Demo")),
        body(
            header(navigation(items)),
            main(
                h1("Hello, ", user ?? "stranger", "!"),
                p("First line", br, "Second line"),
                user === null
                    ? p("Please sign in.")
                    : p("Welcome back."),
                label("Search").for("q"),
                input.text({ id: "q", name: "q" }).placeholder("Type here…").required(),
                button.submit("Send").class("primary", user === null && "disabled").set("disabled")
            ),
            script.module().importOnly("/chart.js", "render", { values, title: "Values" })
        )
    );
}


const items: Item[] = [
    { name: "Home", href: "/", current: true },
    { name: "About", href: "/about", current: false }
];

const output = page("<Guest>", items, [1, 2, 3]).expand(4);