Merge pull request #69 from bigskysoftware/toggleHEADdev

Toggle

4 files changed, 222 insertions, 28 deletions

diff --git a/src/aria.css b/src/aria.css
index 6a57157..ed12c76 100644
--- a/src/aria.css
+++ b/src/aria.css
@@ -116,3 +116,77 @@
     width: fit-content;
     text-align: center;
 }
+
+
+input[type=checkbox][role=switch] {
+  all: unset;
+  appearance: none;
+
+  display: inline-grid;
+  vertical-align: middle;
+  grid-template-columns: repeat(2, 1rem);
+  aspect-ratio: 2 / 1;
+  margin-block: auto;
+
+  &::before, &::after {
+    content: '';
+    display: inline-block;
+
+    transition: transform .2s ease-in-out, background-color .2s ease-in-out, background-color .2s ease-in-out;
+  }
+
+  &::before {
+    grid-column: 1 / span 2;
+    grid-row: 1;
+    border: 1px solid var(--graphical-fg);
+    background: var(--bg);
+    border-radius: 9999rem;
+  }
+
+  &::after {
+    --toggle-nub-margin: 2px;
+    grid-column: 1;
+    grid-row: 1;
+    margin: var(--toggle-nub-margin);
+    border-radius: 99999rem;
+    background: var(--graphical-fg);
+  }
+
+  &:checked {
+    &::before {
+      border-color: var(--accent);
+      background: var(--accent);
+    }
+    &::after {
+      transform: translateX(calc(100% + 2 * var(--toggle-nub-margin)));
+      background: var(--bg);
+    }
+  }
+
+  &:indeterminate {
+    &::after {
+      transform: translateX(calc(50% + var(--toggle-nub-margin)));
+      background: var(--bg);
+      border: 1px solid var(--graphical-fg);
+    }
+  }
+
+  &:is(label > *):not(#specificity-hack) {
+    margin-block-end: auto;
+  }
+  &:not(label > *) {
+    padding-block: calc(var(--gap) / 4 + (var(--rhythm) - 1em) / 2);
+  }
+
+  :is(label:has(> &)) {
+    /* Lightning CSS requires :is() when nested selector doesn't start with & */
+    display: flex;
+    gap: var(--gap);
+    flex-direction: row;
+  }
+  :is(label:has(+ &)) {
+    /* Lightning CSS requires :is() when nested selector doesn't start with & */
+    width: 100%;
+  }
+
+}
diff --git a/src/core/sanitize.css b/src/core/sanitize.css
index f2c8f26..9906d65 100644
--- a/src/core/sanitize.css
+++ b/src/core/sanitize.css
@@ -116,7 +116,7 @@ button, input, select {
  * Correct the inability to style buttons in iOS and Safari.
  */
 
-button, [type="button"], [type="reset"], [type="submit"]) {
+button, [type="button"], [type="reset"], [type="submit"] {
     -webkit-appearance: button;
 }
 
diff --git a/src/js/19.js b/src/js/19.js
index 43c797b..d238888 100644
--- a/src/js/19.js
+++ b/src/js/19.js
@@ -1,4 +1,4 @@
-/** 
+/**
  * a DOM helper library.
  * "1 US$ = 18.5842 TR₺ · Oct 16, 2022, 20:52 UTC"
  */
@@ -42,13 +42,13 @@
 /**
  * Creates a logging function.
  * The {@link scope} will be prepended to each message logged.
- * 
+ *
  * We usually use `ilog` as a name for the resulting function.
  * It returns its last argument,
  * which makes it easier to log intermediate values in an expression:
- * 
+ *
  *     const x = a + ilog("b:", b); // x = a + b
- * 
+ *
  * @param {string} scope The name of the component/module/etc. that will use this logger.
  * @returns {Logger} The `ilog` function.
  */
@@ -103,14 +103,14 @@ export function traverse(
       ? $(root, selector)
       : $$(root, selector).at(-1);
   }
-  
+
   if (!current) return wrapIt();
-  
+
   // Traverse left to right, bottom to top.
   //
   //                                                  (begin ascii art diagram)
   //                           (R)
-  //                         /     \   
+  //                         /     \
   //                    (r)           (4) <- return value
   //                 /   |   \       /   \
   //    current -> (1)  (2)  (3)    (*) (*)
@@ -118,11 +118,11 @@ export function traverse(
   //
   // In the diagram above, 1, 2, 3 are tested by the selector (assuming we
   // start at 1). Then, having run out of siblings, we move up (as many times
-  // as needed) before advancing, ending up at 4. 
+  // as needed) before advancing, ending up at 4.
   //
   // To "test" an element, ee call Element#matches, then if that returns false,
   // querySelector. The querySelector call is how the items marked with
-  // asterisks can be checked. 
+  // asterisks can be checked.
   let cursor = current;
   while (true) {
     while (cursor[advance] === null) { // 3
@@ -169,7 +169,7 @@ export function $$(scope, sel) {
  * @property {EventTarget} target
  * @property {string} type
  * @property {EventListener} listener
- * @property {object} options  
+ * @property {object} options
  */
 
 /**
@@ -211,7 +211,7 @@ export function off({ target, type, listener, options }) {
 /**
  * "Halt" an event -- convenient wrapper for `preventDefault`, `stopPropagation`, and `stopImmediatePropagation`.
  * @param {string} o - How to halt. Space-separated list of "default", "bubbling" and "propagation".
- * @param {Event} e - The event. 
+ * @param {Event} e - The event.
  */
 export function halt(o, e) {
   for (const t of o.split(" ")) {
@@ -226,7 +226,7 @@ export function halt(o, e) {
 
 /**
  * Decorator for any event listener to call {@link halt}.
- * 
+ *
  *     on(el, "click", halts("default", e => ...))
  *
  * @template {Event} T
@@ -251,13 +251,13 @@ export function dispatch(el, type, detail, options) {
 
 /**
  * Get, remove or set an attribute.
- * 
+ *
  * - attr(el, "name") Get the attribute "name"
  * - attr(el, "name", "value") Set the attribute "name" to "value"
  * - attr(el, "name", null) Remove the attribute "name"
  * - attr(el, [ nameA: "valueA", nameB: "valueB" ]) Set the attributes name-a to "valueA", name-b to "valueB"
- * 
- * @param {Element} el 
+ *
+ * @param {Element} el
  * @param {string | Record<string, unknown>} name - The attribute name **or** a map of names to values.
  *   If an object is passed, camelCase attribute names will be converted to kebab-case.
  * @param {unknown} value - The value of the attribute, when setting. Pass `null` to remove an attribute.
@@ -333,9 +333,9 @@ export function htmlescape(s) {
  * Template literal that escapes HTML in interpolated values and returns a DocumentFragment.
  * Can also be called with a string to parse it as HTML.
  * To let trusted HTML through escaping, parse it first:
- * 
+ *
  *     html`<p>My trusted markup: ${html(trustedMarkup)}</p>`
- * 
+ *
  * @param {TemplateStringsArray | string} str
  * @param {...unknown} values
  * @returns {DocumentFragment}
@@ -421,10 +421,10 @@ export function prev(root, selector, current, options = {}) {
 
 /**
  * Create a handler for keyboard events using a keyboard shortcut DSL.
- * 
+ *
  * - "ArrowLeft"
  * - "Ctrl+Alt+3"
- * 
+ *
  * @param {Record<string, KeyboardEventListener>} hotkeys
  * @returns KeyboardEventListener
  */
@@ -440,7 +440,7 @@ export function hotkey(hotkeys) {
       const
         tokens = hotkeySpec.split("+"), key = /** @type {string} */ (tokens.pop());
       let modifiers = 0 | 0;
-      for (const token in tokens)
+      for (const token of tokens)
         switch (token.toLowerCase()) {
           case "alt": modifiers |= alt; break;
           case "ctrl": modifiers |= ctrl; break;
@@ -460,8 +460,8 @@ export function hotkey(hotkeys) {
 
 /**
  * Debounce a function.
- * 
- * @template {unknown[]} TArgs 
+ *
+ * @template {unknown[]} TArgs
  * @param {number} t The debounce time.
  * @param {(...args: TArgs) => void} f The function.
  * @param {object} [options]
@@ -507,13 +507,13 @@ export function behavior(selector, init) {
 /**
  * @template TData
  * @typedef {object} Repeater
- * 
+ *
  * @property {(datum: TData) => string} idOf
  * Returns the HTML id for a given data value.
- * 
+ *
  * @property {(datum: TData, ctx: { id: string }) => ChildNode} create
  * Creates a an element for a data value.
- * 
+ *
  * @property {(el: Element, datum: TData) => Element | null} update
  * Update an element for a new data value.
  */
diff --git a/www/docs/40-aria.md b/www/docs/40-aria.md
index 6c02abd..396837f 100644
--- a/www/docs/40-aria.md
+++ b/www/docs/40-aria.md
@@ -165,7 +165,7 @@ The fiex direction will be set based on `aria-orientation`.
 
 ## Feed
 
-Use `feed` role with `<article/>` children  — see [WAI: Feed][]. Nested feeds are supported.
+Use `feed` role with `<article>` children  — see [WAI: Feed][]. Nested feeds are supported.
 
 To get the actual behavior of an accessible feed, you can use [Missing.js &sect; Feed](/docs/js#feed).
 
@@ -198,5 +198,125 @@ To get the actual behavior of an accessible feed, you can use [Missing.js &sect;
   </div>
 
 </figure>
-
 [WAI: Feed]: https://www.w3.org/WAI/ARIA/apg/patterns/feed/
+
+
+## Toggle Switch
+
+Use `switch` role with `<input type="checkbox">`. The indeterminate state is supported, but it must be set with JavaScript.
+
+<figure>
+<figcaption>Code: Toggle Switches</figcaption>
+
+  ~~~ html
+  <div class="f-switch">
+    <fieldset class="f-col">
+      <legend>Toggles inside labels</legend>
+      <label><input type="checkbox" role="switch">Toggle me</label>
+      <label><input type="checkbox" role="switch" checked>But not me</label>
+      <label><input type="checkbox" role="switch" class="indeterminate">I'm not sure</label>
+    </fieldset>
+    <fieldset class="f-col">
+      <legend>Toggles inside labels, flipped</legend>
+      <label class="justify-content:space-between">Toggle me<input type="checkbox" role="switch"></label>
+      <label class="justify-content:space-between">But not me <input type="checkbox" role="switch" checked></label>
+      <label class="justify-content:space-between">I'm not sure <input type="checkbox" role="switch" class="indeterminate"></label>
+    </fieldset>
+    <script>
+      document.querySelectorAll('.indeterminate').forEach(
+        el => {el.indeterminate = true;}
+      )
+    </script>
+  </div>
+  ~~~
+
+  <div class="f-switch">
+    <fieldset class="f-col">
+      <legend>Toggles inside labels</legend>
+      <label><input type="checkbox" role="switch">Toggle me</label>
+      <label><input type="checkbox" role="switch" checked>But not me</label>
+      <label><input type="checkbox" role="switch" class="indeterminate">I'm not sure</label>
+    </fieldset>
+    <fieldset class="f-col">
+      <legend>Toggles inside labels, flipped</legend>
+      <label class="justify-content:space-between">Toggle me<input type="checkbox" role="switch"></label>
+      <label class="justify-content:space-between">But not me <input type="checkbox" role="switch" checked></label>
+      <label class="justify-content:space-between">I'm not sure <input type="checkbox" role="switch" class="indeterminate"></label>
+    </fieldset>
+  </div>
+
+  ~~~ html
+  <div class="f-switch">
+    <fieldset class="table rows">
+      <legend>Toggles before labels</legend>
+      <div>
+        <input id="toggle-1" type="checkbox" role="switch">
+        <label for="toggle-1">Toggle me</label>
+      </div>
+      <div>
+        <input id="toggle-2"type="checkbox" role="switch" checked>
+        <label for="toggle-2">But not me</label>
+      </div>
+      <div>
+        <input id="toggle-3" type="checkbox" role="switch" class="indeterminate">
+        <label for="toggle-3">I'm not sure</label>
+      </div>
+    </fieldset>
+    <fieldset class="table rows">
+      <legend>Toggles after labels</legend>
+      <div>
+        <label for="toggle-4">Toggle me</label>
+        <input id="toggle-4" type="checkbox" role="switch">
+      </div>
+      <div>
+        <label for="toggle-5">But not me</label>
+        <input id="toggle-5" type="checkbox" role="switch" checked>
+      </div>
+      <div>
+        <label for="toggle-6">I'm not sure</label>
+        <input id="toggle-6" type="checkbox" role="switch" class="indeterminate">
+      </div>
+    </fieldset>
+    <script>
+      document.querySelectorAll('.indeterminate').forEach(
+        el => {el.indeterminate = true;}
+      )
+    </script>
+  </div>
+  ~~~
+
+  <div class="f-switch">
+    <fieldset class="table rows">
+      <legend>Toggles before labels</legend>
+      <div>
+        <input id="toggle-1" type="checkbox" role="switch">
+        <label for="toggle-1">Toggle me</label>
+      </div>
+      <div>
+        <input id="toggle-2"type="checkbox" role="switch" checked>
+        <label for="toggle-2">But not me</label>
+      </div>
+      <div>
+        <input id="toggle-3" type="checkbox" role="switch" class="indeterminate">
+        <label for="toggle-3">I'm not sure</label>
+      </div>
+    </fieldset>
+    <fieldset class="table rows">
+      <legend>Toggles after labels</legend>
+      <div>
+        <label for="toggle-4">Toggle me</label>
+        <input id="toggle-4" type="checkbox" role="switch">
+      </div>
+      <div>
+        <label for="toggle-5">But not me</label>
+        <input id="toggle-5" type="checkbox" role="switch" checked>
+      </div>
+      <div>
+        <label for="toggle-6">I'm not sure</label>
+        <input id="toggle-6" type="checkbox" role="switch" class="indeterminate">
+      </div>
+    </fieldset>
+  </div>
+
+  <script>document.querySelectorAll('.indeterminate').forEach(el => {el.indeterminate = true;})</script>
+</figure>