From a06729b6b49cb922a0573cd1d2c0fc105de2ccbb Mon Sep 17 00:00:00 2001
From: Ryota Kameoka <ok@ryota-ka.me>
Date: Tue, 9 Jul 2024 18:10:10 +0900
Subject: [PATCH] Support the Popover API

---
 README.md                |  8 +++++--
 src/jsx-runtime.test.tsx | 46 ++++++++++++++++++++++++++++++++++++++++
 src/jsx-runtime.ts       |  6 ++++++
 src/types.ts             |  5 +++++
 4 files changed, 63 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index c22f0eb..5ed92ea 100644
--- a/README.md
+++ b/README.md
@@ -145,9 +145,10 @@ An attribute starting with `on` will passed to [the event listeners module](http
 // { on: { click: f } }
 ```
 
-### `list` and `role`
+### `list`, `role`, and `popoverTarget`
 
-The `list` and the `role` attributes will be passed to [the attributes module](https://github.com/snabbdom/snabbdom#the-attributes-module).
+The `list`, the `role`, and the `popoverTarget` attributes will be passed to [the attributes module](https://github.com/snabbdom/snabbdom#the-attributes-module).
+Note that the attribute names will be lowercased.
 
 ```tsx
 <div role="button" />
@@ -155,6 +156,9 @@ The `list` and the `role` attributes will be passed to [the attributes module](h
 
 <input list="options" />
 // { attrs: { list: 'options' } }
+
+<button popoverTarget="popover" />
+// { attrs: { popovertarget: 'popover' } }
 ```
 
 ### `$hook`
diff --git a/src/jsx-runtime.test.tsx b/src/jsx-runtime.test.tsx
index 8b419f9..416d1a0 100644
--- a/src/jsx-runtime.test.tsx
+++ b/src/jsx-runtime.test.tsx
@@ -1032,4 +1032,50 @@ describe('automatic runtime', () => {
             text: undefined,
         });
     });
+
+    test('popover API', () => {
+        expect(
+            <>
+                <button popoverTarget="popover" popoverTargetAction="toggle">
+                    Toggle
+                </button>
+                <div popover>Hello, world!</div>
+            </>,
+        ).toStrictEqual({
+            children: [
+                {
+                    children: undefined,
+                    data: {
+                        attrs: {
+                            popovertarget: 'popover',
+                        },
+                        props: {
+                            popoverTargetAction: 'toggle',
+                        },
+                    },
+                    elm: undefined,
+                    key: undefined,
+                    sel: 'button',
+                    text: 'Toggle',
+                },
+                {
+                    children: undefined,
+                    data: {
+                        props: {
+                            popover: 'auto',
+                        },
+                    },
+                    elm: undefined,
+                    key: undefined,
+                    sel: 'div',
+                    text: 'Hello, world!',
+                },
+            ],
+            data: {},
+            elm: undefined,
+            key: undefined,
+            sel: undefined,
+            text: undefined,
+        });
+    });
 });
diff --git a/src/jsx-runtime.ts b/src/jsx-runtime.ts
index 5c72861..6b08402 100644
--- a/src/jsx-runtime.ts
+++ b/src/jsx-runtime.ts
@@ -63,6 +63,12 @@ const canonicalizeVNodeData = (orig: VNodeData): VNodeData => {
         } else if (key === 'list' || key === 'role') {
             data.attrs ??= {};
             data.attrs[key] = v;
+        } else if (key === 'popover' && v === true) {
+            data.props ??= {};
+            data.props['popover'] = 'auto';
+        } else if (key === 'popoverTarget') {
+            data.attrs ??= {};
+            data.attrs['popovertarget'] = v;
         } else if (key === '$style' || key === 'style') {
             data.style = v;
         } else if (key.startsWith('$')) {
diff --git a/src/types.ts b/src/types.ts
index ba23c92..6a60fa7 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -336,6 +336,7 @@ export declare namespace Internal {
         type Dir = 'ltr' | 'rtl' | 'auto' | Whatever;
         type EnterKeyHint = 'done' | 'enter' | 'go' | 'next' | 'previous' | 'search' | 'send' | Whatever;
         type InputMode = 'none' | 'text' | 'tel' | 'url' | 'email' | 'numeric' | 'decimal' | 'search' | Whatever;
+        type Popover = 'auto' | 'manual';
 
         interface Props extends Element.Props {
             accessKey?: string | undefined;
@@ -353,6 +354,7 @@ export declare namespace Internal {
             noModule?: boolean | undefined;
             nonce?: string | undefined;
             outerText?: string | undefined;
+            popover?: Popover | true | undefined;
             spellcheck?: boolean | undefined;
             tabIndex?: number | string | undefined;
             title?: string | undefined;
@@ -408,6 +410,7 @@ export declare namespace Internal {
     }
 
     namespace HTMLButtonElement {
+        type PopoverTargetAction = 'hide' | 'show' | 'toggle';
         type Type = 'button' | 'reset' | 'submit' | Whatever;
 
         interface Props extends HTMLElement.Props {
@@ -419,6 +422,8 @@ export declare namespace Internal {
             formNoValidate?: boolean | undefined;
             formTarget?: string | undefined;
             name?: string | undefined;
+            popoverTarget?: string | undefined;
+            popoverTargetAction?: PopoverTargetAction | undefined;
             type?: Type | undefined;
             value?: string;
         }