examples/todo.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="x-ua-compatible" content="ie=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="shortcut icon" type="image/x-icon" href="../favicon.ico">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/water.css@2/out/water.css">
    <title>Todo - Ring</title>
  </head>
  <body>
    <h1><img src="../favicon.ico"> To do list</h1>
    <input type="text">
    <ul></ul>
    <button>New!</button>
    <script type="module">
      import ring from "../index.js"

      ring({
        init: [],
        register: (update, dispatch) => ({
          init: () => {
            const input = document.body.querySelector('input')
            document.body.querySelector('button').
              addEventListener('click',() => {
                dispatch('addTodo', input.value)
                input.value = ""
              })
          },
          addTodo: value => update(todos => todos.concat(value))
        }),
        view: todos => {
          document.body.querySelector('ul').innerHTML =
            todos.map(todo => `<li>${todo}</li>`).join('\n')
        }
      })
    </script>
  </body>
</html>