Page

Page is the full HTML document for a page, with its title, its initial signals, and the runtime.

Page

Page::render evaluates every binding with the initial signals, so the first HTML already contains the values the runtime would compute.

Item	Summary
`Page::new`	Starts a page with its title and initial signal values.
`child`	Appends a node to `<body>`.
`on_key`	Runs `stmt` when `shortcut` is pressed anywhere on the page.
`computed`	Keeps `signal` equal to `value`, recomputed when a signal `value` reads changes.
`bind_title`	Keeps the document's title, the text of the browser tab, equal to `title`.
`theme`	Sets token values for the whole page.
`global`	Adds rules for elements by their tag, and fonts, to the page.
`style`	Adds `sheet` to `<head>` as a `<style>` block.
`stylesheet`	Adds a `<link rel="stylesheet">` for the file at `href` to `<head>`.
`script`	Adds a `<script type="module">` for the file at `src` to `<head>`.
`lang`	Sets the language of the page, the `lang` attribute of `<html>`, to the BCP 47 tag `tag`.
`runtime_src`	Loads the runtime from `src` instead of `RUNTIME_PATH`, for a page served as a static file.
`csp_nonce`	Puts `nonce` on the page's `<style>` and `<script>` elements, for a Content-Security-Policy that allows styles by nonce.
`render`	Renders the document.
`value_of`	The value `signal` starts at in the browser, for a test of a page handler.
`RUNTIME_PATH`	The path `Page` loads the runtime from, which names a hash of `RUNTIME_JS`.
`RUNTIME_JS`	The browser runtime, built from `runtime/` in the repository.

Search results and link previews

A canonical URL and the image of a card are absolute, so they join a path to an Origin. Navigation loads the next document, so each page writes its own tags.

Item	Summary
`description`	Sets the summary of the page that search results and link previews show.
`canonical`	Names `url` on `origin` as the page's one address.
`alternate`	Names `url` on `origin` as the same page in the language `hreflang`.
`alternate_default`	Names `url` on `origin` as the version for a visitor whose language no alternate matches.
`noindex`	Asks search engines to leave the page out of their results.
`nofollow`	Asks search engines not to follow the links on the page.
`framed_by`	Lets pages served from `origin` show this page in a frame.
`framed_anywhere`	Lets a page of any site show this page in a frame.
`json_ld`	Adds `data` to `<head>` as JSON-LD, the structured data search engines read.
`icon`	Uses the file at `href` as the page's icon in tabs and bookmarks.
`open_graph`	Adds the card a link to the page shows in chat apps and social sites.
`Origin`	The scheme, host, and optional path prefix a site is served from.
`Origin::under`	The same origin with the site served under `prefix`, such as `/blog`.
`Origin::parse`	Reads an origin and an optional prefix from configuration, such as `https://example.com/blog`.
`OriginError`	Text that `Origin::parse` refused, with the rule it broke.
`OpenGraph`	The card a chat app or a social site shows for a link to the page.
`OpenGraphType`	What a page shows, the `og:type` of its `OpenGraph` card.
`OpenGraphLocale`	A language and territory in the `ja_JP` form that `og:locale` takes.