tutu/src/utils.tsx

import { createRenderEffect, createSignal, onCleanup } from "solid-js";

export function useDocumentTitle(newTitle?: string) {
  const capturedTitle = document.title;
  const [title, setTitle] = createSignal(newTitle ?? capturedTitle);

  createRenderEffect(() => {
    document.title = title();
  });

  onCleanup(() => {
    document.title = capturedTitle;
  });

  return setTitle;
}

export function mergeClass(c1: string | undefined, c2: string | undefined) {
  if (!c1) {
    return c2;
  }
  if (!c2) {
    return c1;
  }
  return [c1, c2].join(" ");
}