Honold: A flash store for Hono applications

A Laravel-inspired flash store for Hono applications.

Flash messages and old input values are stored in cookies and are available for the next request only. Don't store sensitive data in flash messages or old inputs!

Installation

deno add jsr:@wuespace/honold

Usage

import { Hono } from "@hono/hono";
import { flash, flashInputs, getFlash, honold, old } from "@wuespace/honold";

const app = new Hono()
  .use(honold())
  .get("/", (c) => {
    return c.render(
      <form action="/submit" method="post">
        {getFlash("error")?.map((msg) => (
          <div style="color: red;" key={msg}>{msg}</div>
        ))}
        {getFlash("success")?.map((msg) => (
          <div style="color: green;" key={msg}>{msg}</div>
        ))}
        <input
          type="text"
          name="name"
          placeholder="Name"
          value={old("name") ?? ""}
        />
        <button type="submit">Submit</button>
      </form>,
    );
  })
  .post("/submit", async (c) => {
    const form = await c.req.formData();
    const name = form.get("name") as string;
    if (!name || name.length < 5) {
      await flashInputs();
      flash("error", "Name is required and must be at least 5 characters long");
      return c.redirect("/");
    }
    flash("success", "Form submitted successfully");
    return c.redirect("/");
  });

Deno.serve(app.fetch);

You can also use

import { textInputProps } from "jsr:@wuespace/honold";

<input {...textInputProps("name", "Default value")} placeholder="Name" />;

instead of manually setting all attributes.

Limitations

File inputs are not flashed when calling flashInputs().

License

MIT License. See LICENSE for details.