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// The delegated dispatcher, ported from mnw.js:724-871. |
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// |
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// It lets templates drop inline `on*` / `hx-on::` handlers so the CSP keeps |
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// `script-src 'self'` (no 'unsafe-inline'). Verbs resolve against a typed |
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// `register()` registry FIRST, falling back to a `window.<verb>` global for |
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// handlers not yet migrated off the legacy `static/*.js` files. New code should |
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// `register()`, never add a global, the `frontend_globals` seal enforces the |
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// ratchet. |
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// |
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// ONE vocabulary, several hooks. A verb names what happens; the attribute names |
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// when. `data-action` is a click, `data-change` / `data-input` / `data-submit` |
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// are the other three DOM events, and `data-after` / `data-after-always` are |
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// htmx's request lifecycle. Arguments come from `data-arg` / `data-arg2`, the |
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// target of a verb that acts on another element from `data-target` or |
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// `data-href`, whichever hook dispatched it. The same verb reached two ways is |
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// the same registry entry. |
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|
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import { byId, targets } from './dom.ts'; |
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import { showToast } from './toast.ts'; |
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|
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/** A named verb. `args` are the positional `data-arg` / `data-arg2` values. |
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* `evt` is whatever triggered the dispatch: a DOM event for the click family, |
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* htmx's `htmx:after:request` CustomEvent for the `data-after` family. Most |
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* verbs ignore it; the ones that branch on the request outcome do not. */ |
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export type ActionHandler = (this: Element, args: string[], evt: Event) => void; |
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|
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/** The legacy `window.<verb>` bridge calls positionally, which is the shape |
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* those handlers were written against and the reason they are still callable |
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* without being ported. */ |
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type LegacyHandler = (this: Element, ...args: string[]) => void; |
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|
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const registry = new Map<string, ActionHandler>(); |
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|
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/** Register a named verb. Preferred over a `window.<name>` global; the |
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* dispatcher checks the registry before the global fallback. */ |
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export function register(name: string, fn: ActionHandler): void { |
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registry.set(name, fn); |
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} |
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|
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type BuiltinFn = (el: Element) => void; |
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|
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/** Built-in verbs operating on `data-target` element ids. */ |
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const BUILTINS: Record<string, BuiltinFn> = { |
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show: (el) => targets(el).forEach((t) => t.classList.remove('hidden')), |
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hide: (el) => targets(el).forEach((t) => t.classList.add('hidden')), |
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toggle: (el) => targets(el).forEach((t) => t.classList.toggle('hidden')), |
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click: (el) => targets(el).forEach((t) => t.click()), |
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remove: (el) => targets(el).forEach((t) => t.remove()), |
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'remove-self': (el) => el.remove(), |
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}; |
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|
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/** Collect positional args from `data-arg` / `data-arg2`. Exported for tests. */ |
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export function collectArgs(el: Element): string[] { |
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const args: string[] = []; |
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const a1 = el.getAttribute('data-arg'); |
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if (a1 !== null) args.push(a1); |
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const a2 = el.getAttribute('data-arg2'); |
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if (a2 !== null) args.push(a2); |
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return args; |
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} |
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|
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function run(el: Element, verb: string, evt: Event): void { |
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if (el.hasAttribute('data-prevent')) evt.preventDefault(); |
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if (el.hasAttribute('data-stop')) evt.stopPropagation(); |
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if (verb === 'nav') { |
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const href = el.getAttribute('data-href'); |
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if (href) window.location.href = href; |
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return; |
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} |
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const builtin = BUILTINS[verb]; |
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if (builtin) { |
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builtin(el); |
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return; |
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} |
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const args = collectArgs(el); |
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// Registry first, then the legacy `window.<verb>` global (strangler bridge). |
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const registered = registry.get(verb); |
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if (registered) { |
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registered.call(el, args, evt); |
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return; |
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} |
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const global = (window as unknown as Record<string, unknown>)[verb]; |
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if (typeof global !== 'function') { |
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console.warn('data-action: no handler for', verb); |
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return; |
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} |
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(global as LegacyHandler).apply(el, args); |
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} |
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|
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/** Run every verb named in a space-separated attribute value, in written order. |
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* One element can ask for more than one thing: a form that resets itself and |
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* then refreshes the panel it lives in says `reset refresh`. */ |
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function runList(el: Element, attr: string, evt: Event): void { |
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const value = el.getAttribute(attr); |
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if (!value) return; |
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for (const verb of value.split(/\s+/)) { |
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if (verb) run(el, verb, evt); |
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} |
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} |
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|
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function listen(eventName: string, attr: string, autoPrevent: boolean): void { |
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document.addEventListener(eventName, (evt) => { |
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const el = (evt.target as Element | null)?.closest('[' + attr + ']'); |
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if (!el) return; |
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if (autoPrevent) evt.preventDefault(); |
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const verb = el.getAttribute(attr); |
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if (verb) run(el, verb, evt); |
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}); |
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} |
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|
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/** Elements the browser already activates from the keyboard. */ |
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const NATIVELY_ACTIVATED = new Set(['A', 'BUTTON', 'INPUT', 'SELECT', 'TEXTAREA']); |
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|
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/** Enter / Space on a `data-action` element the browser does not activate on |
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* its own. The charter requires a focus ring on custom interactive containers |
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* such as the sort headers, and a ring on something that cannot be operated |
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* from the keyboard is decoration. Opt in with `tabindex="0"`. */ |
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function listenKeyActivate(): void { |
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document.addEventListener('keydown', (evt) => { |
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const key = (evt as KeyboardEvent).key; |
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if (key !== 'Enter' && key !== ' ') return; |
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const el = (evt.target as Element | null)?.closest('[data-action]'); |
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if (!el || NATIVELY_ACTIVATED.has(el.tagName) || !el.hasAttribute('tabindex')) return; |
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evt.preventDefault(); |
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const verb = el.getAttribute('data-action'); |
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if (verb) run(el, verb, evt); |
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}); |
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} |
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|
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/** Install the `data-action`/`-change`/`-input`/`-submit` dispatcher. */ |
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export function initActionDispatcher(): void { |
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listen('click', 'data-action', false); |
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listenKeyActivate(); |
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listen('change', 'data-change', false); |
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listen('input', 'data-input', false); |
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listen('submit', 'data-submit', true); |
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} |
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|
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// ---- The `data-after` family, dispatched on htmx's request lifecycle ---- |
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// |
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// These were ten private `data-hx-*` attributes with their own dispatcher, a |
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// second vocabulary sitting beside `data-action` and resolving nothing the same |
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// way. Two of the ten (`data-hx-get`, `data-hx-target`) also collided with |
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// htmx's own `data-hx-*` alias, so at eight sites htmx read the private |
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// directive as a real htmx attribute and acted on it as well. |
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// |
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// They are verbs now, in the one registry, taking their arguments from the |
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// `data-arg` / `data-target` / `data-href` conventions the click family already |
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// uses. What is left is the hook they run on, which is what `data-after` and |
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// `data-after-always` name. |
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|
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/** htmx 4 hangs the whole request on `detail.ctx`; htmx 2 spread it across the |
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* detail itself as `elt`, `xhr`, `parameters` and `successful`. Only the |
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* fields the verbs below read are named. */ |
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interface HxDetail { |
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ctx: { |
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sourceElement: HTMLElement; |
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/** `body` is FormData while `htmx:config:request` runs, `parameters` in 2.x. */ |
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request: { body?: FormData }; |
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response?: { status: number }; |
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/** The response body, `xhr.responseText` in 2.x. */ |
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text?: string; |
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}; |
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} |
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|
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function refreshProfileTab(): void { |
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// `settings-profile` since `6b24f2df` step 4 described the settings sub-nav: |
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// six sections shared one `settings-body` pane while the nav was hand-written, |
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// and each has its own frame now. |
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const t = document.getElementById('settings-profile'); |
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if (t) { |
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htmx.ajax('GET', '/dashboard/tabs/profile', { target: t, swap: 'innerHTML' }); |
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} else { |
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byId('tab-profile')?.click(); |
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} |
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} |
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|
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/** Verbs the `data-after` family introduced. Registered rather than kept in a |
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* map of their own, so `data-action="reload"` and `data-after="reload"` are the |
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* same verb reached through different hooks. */ |
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function registerAfterVerbs(): void { |
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register('reset', function () { |
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const form = this as unknown as HTMLFormElement; |
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if (typeof form.reset === 'function') form.reset(); |
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}); |
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register('reload', () => window.location.reload()); |
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register('refresh', (args) => { |
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const [url, target] = args; |
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if (url && target) htmx.ajax('GET', url, target); |
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}); |
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register('toast', (args) => showToast(args[0] ?? '', args[1] || 'info')); |
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register('label-added', function () { |
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this.textContent = 'Added'; |
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}); |
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register('mark-added', function () { |
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this.textContent = 'Added'; |
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(this as HTMLButtonElement).disabled = true; |
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}); |
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// `label-added` + `fade-row` is the old `fade-row-added`, which relabelled |
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// unconditionally and faded only on success. Two hooks say that between them; |
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// one verb had to read the outcome to say it. Note it relabels without |
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// disabling, which is what that button did and is not what `mark-added` does. |
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register('fade-row', function () { |
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this.closest('tr')?.classList.add('is-faded'); |
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}); |
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register('refresh-profile', () => refreshProfileTab()); |
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// The only verb that reads the response rather than the element. The verify |
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// endpoint answers 200 whether or not the TXT record matched, so success |
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// alone does not mean verified. |
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register('refresh-profile-if-verified', (_args, evt) => { |
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const text = (evt as CustomEvent<HxDetail>).detail?.ctx?.text; |
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if (text && text.indexOf('verified successfully') !== -1) refreshProfileTab(); |
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}); |
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} |
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|
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/** Install the `data-after` / `data-after-always` / `data-config` dispatcher. */ |
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export function initAfterRequestDispatcher(): void { |
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registerAfterVerbs(); |
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|
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document.body.addEventListener('htmx:after:request', (e) => { |
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const evt = e as CustomEvent<HxDetail>; |
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const el = evt.detail.ctx.sourceElement; |
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if (!el || !el.getAttribute) return; |
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|
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runList(el, 'data-after-always', evt); |
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// `detail.successful` in htmx 2. The status is what it summarised, and 4 |
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// fires this event for error responses too. |
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if ((evt.detail.ctx.response?.status ?? 0) >= 400) return; |
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runList(el, 'data-after', evt); |
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}); |
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|
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document.body.addEventListener('htmx:config:request', (e) => { |
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const evt = e as CustomEvent<HxDetail>; |
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const el = evt.detail.ctx.sourceElement; |
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if (el?.getAttribute?.('data-config') === 'publish-at-iso') { |
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const body = evt.detail.ctx.request.body; |
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const v = body?.get('publish_at'); |
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if (typeof v === 'string' && v) body?.set('publish_at', new Date(v).toISOString()); |
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} |
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}); |
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} |
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|