jrop · November 13, 2018 16:17
diff --git a/lit-html.html b/lit-html.html
 <!DOCTYPE html>
 <html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>TODO (lit-html)</title>
  </head>
  <body>
    <div id="root"></div>
    <script type="module">
      import {
        html,
        render
      } from "https://unpkg.com/[email protected]/lit-html.js?module";

      const Todo = (searchValue, items) => {
        const onAddItem = () => {
          const newItems = items.slice();
          newItems.push({ text: searchValue });

          renderApp("", newItems);
        };
        const onSearchKeyPress = e => {
          const isEnter = e.code === "Enter";

          const newItems = items.slice();
          if (isEnter) newItems.push({ text: e.target.value });

          const searchValue = isEnter ? "" : e.target.value;
          renderApp(searchValue, newItems);
        };
        const onToggleItem = idx => {
          items[idx].done = !Boolean(items[idx].done);
          renderApp(searchValue, items);
        };
        const onRemoveItem = (e, idx) => {
          e.stopPropagation();
          if (
            !confirm("Are you sure you want to remove " + items[idx].text + "?")
          )
            return;
          items.splice(idx, 1);
          renderApp(searchValue, items);
        };
        return html`
          <div class="todo">
            <h1>TODO</h1>
            <input .value="${searchValue}" @keypress="${onSearchKeyPress}" />
            <button @click="${onAddItem}">Add</button>
            <ul>
              ${
                items.map(
                  (item, idx) =>
                    html`
                      <li
                        class="${item.done && "done"}"
                        @click="${() => onToggleItem(idx)}"
                      >
                        ${item.text}
                        <button @click="${e => onRemoveItem(e, idx)}">
                          Remove
                        </button>
                      </li>
                    `
                )
              }
            </ul>
            <style>
              .todo h1 {
                font-weight: 100;
              }
              .todo ul li {
                cursor: pointer;
              }
              .todo ul li.done {
                text-decoration: line-through;
              }
            </style>
          </div>
        `;
      };

      const renderApp = (searchValue, items) =>
        render(Todo(searchValue, items), document.getElementById("root"));
      renderApp("", []);
    </script>
  </body>
 </html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<meta http-equiv="X-UA-Compatible" content="ie=edge" />
	<title>TODO (lit-html)</title>
	</head>
	<body>
	<div id="root"></div>
	<script type="module">
	import {
	html,
	render
	} from "https://unpkg.com/[email protected]/lit-html.js?module";

	const Todo = (searchValue, items) => {
	const onAddItem = () => {
	const newItems = items.slice();
	newItems.push({ text: searchValue });

	renderApp("", newItems);
	};
	const onSearchKeyPress = e => {
	const isEnter = e.code === "Enter";

	const newItems = items.slice();
	if (isEnter) newItems.push({ text: e.target.value });

	const searchValue = isEnter ? "" : e.target.value;
	renderApp(searchValue, newItems);
	};
	const onToggleItem = idx => {
	items[idx].done = !Boolean(items[idx].done);
	renderApp(searchValue, items);
	};
	const onRemoveItem = (e, idx) => {
	e.stopPropagation();
	if (
	!confirm("Are you sure you want to remove " + items[idx].text + "?")
	)
	return;
	items.splice(idx, 1);
	renderApp(searchValue, items);
	};
	return html`
	<div class="todo">
	<h1>TODO</h1>
	<input .value="${searchValue}" @keypress="${onSearchKeyPress}" />
	<button @click="${onAddItem}">Add</button>
	<ul>
	${
	items.map(
	(item, idx) =>
	html`
	<li
	class="${item.done && "done"}"
	@click="${() => onToggleItem(idx)}"
	>
	${item.text}
	<button @click="${e => onRemoveItem(e, idx)}">
	Remove
	</button>
	</li>
	`
	)
	}
	</ul>
	<style>
	.todo h1 {
	font-weight: 100;
	}
	.todo ul li {
	cursor: pointer;
	}
	.todo ul li.done {
	text-decoration: line-through;
	}
	</style>
	</div>
	`;
	};

	const renderApp = (searchValue, items) =>
	render(Todo(searchValue, items), document.getElementById("root"));
	renderApp("", []);
	</script>
	</body>
	</html>