ef.js

Declarative DOM helper experiment

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import { attr, derived, map, signal, type ReactiveOrStatic } from "./ef.js";

import html from "./lib/html.js";
import {
  id,
  class_,
  for_,
  type,
  autofocus,
  placeholder,
} from "./lib/html/attributes.js";
import { onInput } from "./lib/html/events.js";

const $inputText = signal("");

const { li, span, div, label, input, ul } = html;

function item(labelText: string, $checked: ReactiveOrStatic<boolean>) {
  return li(
    [class_("item"), attr("data-checked", $checked)],
    [
      span(
        [class_("item-check")],
        [map($checked, (checked) => (checked ? "✓" : null))],
      ),
      span([class_("item-label")], [labelText]),
    ],
  );
}

document.body.appendChild(
  div(
    [class_("root")],
    [
      label([for_("test_input")], ["Input text"]),
      input([
        id("test_input"),
        type("text"),
        autofocus(true),
        placeholder("abcABC123!?"),
        onInput((value) => $inputText.set(value)),
      ]),
      ul(
        [class_("items")],
        [
          item(
            "Lowercase",
            derived(() => /[a-z]/.test($inputText.get())),
          ),
          item(
            "Uppercase",
            derived(() => /[A-Z]/.test($inputText.get())),
          ),
          item(
            "Number",
            derived(() => /[0-9]/.test($inputText.get())),
          ),
          item(
            "Symbol",
            derived(() => /[!?,.*^()~_=-]/.test($inputText.get())),
          ),
          item(
            "Space",
            derived(() => /\s/.test($inputText.get())),
          ),
        ],
      ),
    ],
  ),
);