Add js web stuff to landing page + documentation

go/jsruntime/uikit/Badges.tsx

@@ -0,0 +1,53 @@
+import { JSXElement } from "solid-js";
+
+export const BADGE_GREEN = "green";
+export const BADGE_RED = "red";
+export const BADGE_BLUE = "blue";
+export const BADGE_AMBER = "amber";
+export const BADGE_NEUTRAL = "neutral";
+export const BADGE_MUTED = "muted";
+
+const BASE = "inline-flex items-center gap-1 text-xs font-semibold py-0.5 px-2 rounded-default whitespace-nowrap";
+
+const COLORS: Record<string, string> = {
+    "green":   "text-white bg-green-700",
+    "red":     "text-white bg-red-700",
+    "blue":    "text-white bg-sky-800",
+    "amber":   "text-white bg-amber-700",
+    "neutral": "text-white bg-neutral-500",
+    "muted":   "text-ink-faint bg-transparent",
+};
+
+interface BadgeProps {
+    color?: string;
+    pill?: boolean;
+    // When provided, the badge renders as a `<button>` with the given
+    // click handler — same visuals, just interactive.
+    onclick?: () => void;
+    disabled?: boolean;
+    title?: string;
+    // Extra utility classes appended after the base styling — useful
+    // for overriding e.g. the default `font-semibold` (use
+    // `!font-normal`) on specific instances.
+    class?: string;
+    children?: JSXElement;
+}
+
+export function Badge(props: BadgeProps) {
+    const cls = () => {
+        let c = BASE;
+        if (props.pill) c += " rounded-full";
+        c += " " + (COLORS[props.color!] || COLORS["neutral"]);
+        if (props.onclick) c += " cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed border-0";
+        if (props.class) c += " " + props.class;
+        return c;
+    };
+
+    if (props.onclick) {
+        return (
+            <button type="button" class={cls()} onclick={() => props.onclick!()} disabled={props.disabled} title={props.title}>{props.children}</button>
+        );
+    }
+
+    return <span class={cls()} title={props.title}>{props.children}</span>;
+}