Exclusifbêta
Delivery Trail <mv-delivery-trail>
Rend la livraison des messages critiques observable étape par étape et transforme les échecs silencieux en blocages visibles et actionnables : e-mails de réinitialisation de mot de passe et de vérification, codes SMS, factures, notifications push, webhooks, demandes de signature électronique. Chaque message suit un parcours ordonné (created → queued → sent → delivered → opened, ou toutes les étapes que vous déclarez) avec les horodatages, la durée de chaque étape et le texte de statut du fournisseur lui-même. Chaque étape a un budget de temps ; pendant l’attente de l’étape suivante, la ligne qui y mène se remplit au rythme de ce budget et, quand il s’épuise sans progrès, le parcours signale un blocage silencieux précisément à cette étape, explique en termes simples ce qui s’est probablement passé (« Remis au serveur de messagerie il y a 12 min, non ouvert. Il se trouve peut-être dans les spams ou l’onglet Promotions. ») et propose les solutions de repli déclarées par votre app (Renvoyer, Envoyer par SMS, Copier le lien, Appeler) via un événement mv-fallback annulable avec waitUntil(). Les rejets (bounces) affichent leur motif mot pour mot, les nouvelles tentatives du fournisseur sont signalées, les événements webhook arrivés dans le désordre sont réconciliés et les arrivées tardives sont marquées « hors budget ». Alimentez-le avec update(hop, status, { at, detail }) ou un tableau d’événements ; plusieurs messages forment une liste compacte, le pire état en tête (les lignes glissent à leur place), avec un mini-parcours par ligne et des totaux. Les durées se calculent à partir d’horodatages absolus et de minuteurs d’échéance : un onglet en arrière-plan ne dérive jamais et ne rate aucun blocage.
| Catégorie | Affichage de données |
|---|---|
| Type | Web Component (<mv-delivery-trail>) |
| Statut | bêta |
| Kit | Des états système honnêtes |
| Installe aussi | button |
| Keywords | exclusive, culture, delivery, message-status, email, sms, webhook, push-notification, transactional-email, otp, verification, bounce, sla, timeout, stall, fallback, support-tool, observability, tracking, status |
When to use
- A support agent must see why a customer never got a reset email, invoice or code, and act on it without opening the provider's logs
- A sign-in or checkout flow sends a verification code and should offer SMS or a call when the email silently stalls
- An admin console lists outbound webhooks, SMS and emails and must surface failed or overdue deliveries first
- An e-signature or invoicing tool tracks sent, viewed and signed steps and must prompt a reminder when one takes too long
Avoid when
- The user moves through the steps themselves, such as a checkout or onboarding wizard → use Stepper instead
- The concern is a stream of events that stopped arriving altogether, not one message's hops → use Quiet Alarm instead
- The events are a finished history with no expected timing or pending step, where a plain list reads better
Installation
node scripts/add.mjs delivery-trail --out ./src/marvelousAgent IA avec le serveur MCP Marvelous UI : install_components({ slugs: ["delivery-trail"], target_dir: "<absolute path>/src/marvelous", framework: "react" }).
Fichiers copiés (dépendances comprises) : tokens/tokens.css, core/base.css, core/dom.js, core/element.js, core/motion.js, core/observe.js, components/delivery-trail/delivery-trail.js, components/delivery-trail/delivery-trail.css, components/button/button.css.
Utilisation
Démarrage rapide, le balisage minimal qui fonctionne :
<mv-delivery-trail label="Password reset email" recipient="[email protected]" channel="email"
fallbacks="resend: Resend email, sms: Send code via SMS"></mv-delivery-trail>
<!-- from your provider webhooks: trail.update("delivered") -->Balisage de référence : partez de celui-ci et personnalisez-le avec les attributs, data-* et les variables CSS :
<div id="dt-demo" style="width:min(100%,62rem);margin-inline:auto">
<style>
#dt-demo { display:grid; gap:1.5rem; align-content:start }
#dt-demo .dt-grid { display:grid; grid-template-columns:17rem minmax(0,1fr); gap:1rem; align-items:start }
#dt-demo .dt-card { min-width:0; border:1px solid var(--mv-border); border-radius:var(--mv-radius-xl); background:var(--mv-surface); box-shadow:var(--mv-shadow-sm) }
#dt-demo .dt-ticket { display:grid; gap:.875rem; padding:1rem 1.125rem }
#dt-demo .dt-k { margin:0; color:var(--mv-fg-muted); font-size:.6875rem; font-weight:600; letter-spacing:.05em; text-transform:uppercase }
#dt-demo .dt-person { display:flex; align-items:center; gap:.75rem }
#dt-demo .dt-avatar { display:grid; place-items:center; width:2.5rem; height:2.5rem; flex:none; border-radius:50%; background:var(--mv-bg-emphasis); font-size:.8125rem; font-weight:600 }
#dt-demo .dt-person b { display:block; font-size:.9375rem; letter-spacing:-.01em }
#dt-demo .dt-person span { color:var(--mv-fg-muted); font-size:.8125rem }
#dt-demo .dt-quote { margin:0; padding:.625rem .75rem; border-radius:var(--mv-radius-lg); background:var(--mv-bg-subtle); color:var(--mv-fg); font-size:.8125rem; line-height:1.5 }
#dt-demo .dt-facts { display:grid; grid-template-columns:auto 1fr; gap:.375rem .75rem; margin:0; font-size:.8125rem }
#dt-demo .dt-facts dt { color:var(--mv-fg-muted) }
#dt-demo .dt-facts dd { margin:0; text-align:end; font-variant-numeric:tabular-nums }
#dt-demo .dt-badges { display:flex; gap:.375rem; flex-wrap:wrap }
#dt-demo .dt-side { display:grid; gap:.75rem; min-width:0 }
#dt-demo .dt-controls { display:flex; align-items:center; justify-content:space-between; gap:.75rem 1rem; flex-wrap:wrap; padding:.75rem 1rem; border:1px dashed var(--mv-border-strong); border-radius:var(--mv-radius-lg) }
#dt-demo .dt-controls p { margin:0; color:var(--mv-fg-muted); font-size:.75rem; flex:1 1 14rem }
#dt-demo .dt-actions { display:flex; align-items:center; gap:.75rem; flex-wrap:wrap }
#dt-demo .mv-choice { font-size:.8125rem }
#dt-demo .dt-log { min-height:1.1rem; margin:0; color:var(--mv-fg-subtle); font:.75rem/1.4 var(--mv-font-mono); overflow-wrap:anywhere }
#dt-demo .dt-head { display:flex; align-items:end; justify-content:space-between; gap:.5rem 1rem; flex-wrap:wrap; margin:0 0 .75rem }
#dt-demo .dt-head h3 { margin:0; font-size:1rem; letter-spacing:-.01em }
#dt-demo .dt-head p { margin:.125rem 0 0; color:var(--mv-fg-muted); font-size:.8125rem }
@media (max-width:46rem) { #dt-demo .dt-grid { grid-template-columns:minmax(0,1fr) } }
</style>
<!-- 1. Support console: a password reset email that silently never got opened -->
<div class="dt-grid">
<aside class="dt-card dt-ticket" aria-label="Support ticket">
<p class="dt-k">Ticket #48213 · Sign-in</p>
<div class="dt-person">
<span class="dt-avatar" aria-hidden="true">AO</span>
<span><b>Amara Okafor</b><span>Lumen Health · Admin</span></span>
</div>
<p class="dt-quote">“I asked for a password reset twice this morning and nothing ever came. I have a board meeting at noon.”</p>
<dl class="dt-facts">
<dt>Plan</dt><dd>Business</dd>
<dt>Last sign-in</dt><dd>Sep 20, 2026</dd>
<dt>Phone</dt><dd>+1 (415) 555-0192</dd>
</dl>
<div class="dt-badges">
<span class="mv-badge" data-variant="warning">High priority</span>
<span class="mv-badge" data-variant="secondary">Email</span>
</div>
</aside>
<div class="dt-side">
<mv-delivery-trail id="dt-main"
label="Password reset email"
recipient="[email protected]"
channel="email"
budgets="queued: 10s, sent: 30s, delivered: 2m, opened: 10m"
fallbacks="resend: Resend email, sms: Send code via SMS, copy: Copy reset link"
announce="all"></mv-delivery-trail>
<div class="dt-controls">
<p>Resend runs a live, accelerated delivery (budgets of a few seconds). Keep “Lands in spam” on to watch it stall again.</p>
<span class="dt-actions">
<label class="mv-choice"><input type="checkbox" role="switch" class="mv-switch" id="dt-spam" checked> Lands in spam</label>
<button type="button" class="mv-button" data-variant="outline" data-size="sm" id="dt-send">Send a new link</button>
</span>
</div>
<p class="dt-log" id="dt-log" aria-live="off">mv-stall · opened</p>
</div>
</div>
<!-- 2. Outbound messages: several deliveries, worst state first -->
<section aria-labelledby="dt-out-title">
<div class="dt-head">
<div>
<h3 id="dt-out-title">Outbound messages · last hour</h3>
<p>The push notification is on a 10-second budget: watch it stall and move up.</p>
</div>
<button type="button" class="mv-button" data-variant="ghost" data-size="sm" id="dt-replay">Replay</button>
</div>
<mv-delivery-trail id="dt-list"></mv-delivery-trail>
</section>
<script type="module">
const main = document.getElementById("dt-main");
const list = document.getElementById("dt-list");
const log = document.getElementById("dt-log");
const spam = document.getElementById("dt-spam");
const s = 1000, min = 60 * s;
const ago = (ms) => Date.now() - ms;
const say = (text) => { log.textContent = text; };
// ── 1. Password reset email: delivered 12 minutes ago, never opened (10 min budget) ──
main.events = [
{ hop: "created", at: ago(12 * min + 5.4 * s), detail: "Requested from the sign-in page" },
{ hop: "queued", at: ago(12 * min + 5.1 * s), detail: "job_7Hq2 · transactional" },
{ hop: "sent", at: ago(12 * min + 3.8 * s), detail: "Accepted by provider · msg_01J8ZK4F" },
{ hop: "delivered", at: ago(12 * min), detail: "250 2.0.0 OK · mx1.lumenhealth.test" },
];
let run = [];
const clearRun = () => { run.forEach(clearTimeout); run = []; };
const later = (ms, fn) => run.push(setTimeout(fn, ms));
// A live, accelerated send: each hop lands after a short delay; spam = never opened.
function liveSend() {
clearRun();
main.budgets = "queued: 2s, sent: 3s, delivered: 4s, opened: 6s";
main.reset(undefined, { start: true, detail: "Resent by support · Daniel Park" });
later(350, () => main.update("queued", "done", { detail: "job_9Kc4 · transactional" }));
later(1100, () => main.update("sent", "done", { detail: "Accepted by provider · msg_01J8ZQ2M" }));
later(2600, () => main.update("delivered", "done", { detail: "250 2.0.0 OK · mx1.lumenhealth.test" }));
if (!spam.checked) later(4800, () => main.update("opened", "done", { detail: "Opened on mobile · Mail app" }));
}
main.addEventListener("mv-fallback", (e) => {
const { action } = e.detail;
say(`mv-fallback · ${action}`);
if (action === "resend") e.detail.waitUntil(new Promise((r) => setTimeout(r, 500)).then(liveSend));
if (action === "sms") e.detail.waitUntil(new Promise((r) => setTimeout(r, 700)).then(() => say("mv-fallback · sms → code sent to +1 (415) •••-0192")));
});
main.addEventListener("mv-stall", (e) => say(`mv-stall · ${e.detail.hop}`));
main.addEventListener("mv-recover", (e) => say(`mv-recover · ${e.detail.hop}`));
main.addEventListener("mv-complete", () => say("mv-complete"));
document.getElementById("dt-send").addEventListener("click", liveSend);
// ── 2. Outbound messages ──
const at = (list) => list.map(([hop, t, detail, status]) => ({ hop, at: ago(t), detail, status }));
const messages = () => [
{
id: "push-rider", label: "“Your driver is 2 minutes away”", recipient: "Push · Rider app · Sofia Reyes", channel: "push",
hops: ["created", "sent", "delivered", "opened"], budgets: { sent: "5s", delivered: "10s", opened: "5m" },
fallbacks: [{ action: "sms", label: "Send as SMS" }],
events: at([["created", 2.4 * s, "trip_5521 · driver_eta"], ["sent", 2 * s, "Push gateway · msg_0:1727"]]),
},
{
id: "invoice", label: "Invoice INV-2048 · $17,400.00", recipient: "[email protected]", channel: "invoice",
hops: ["created", "queued", "sent", "delivered", "opened"],
fallbacks: [{ action: "edit", label: "Fix the address" }, { action: "copy", label: "Copy payment link", copy: "https://pay.ledgerly.test/i/INV-2048" }],
events: at([
["created", 22 * min, "Issued by Priya Nair"], ["queued", 22 * min - 0.4 * s], ["sent", 22 * min - 1.6 * s, "msg_01J8XR3T"],
["delivered", 21 * min, "550 5.1.1 <[email protected]>: Recipient address rejected: User unknown", "failed"],
]),
},
{
id: "otp", label: "Sign-in code", recipient: "+44 7700 900123 · Oliver Hughes", channel: "sms",
hops: ["created", "sent", "delivered", "confirmed"], budgets: { delivered: "1m", confirmed: "5m" },
fallbacks: [{ action: "resend", label: "Resend code" }, { action: "call", label: "Call with code", href: "tel:+447700900123" }],
events: at([["created", 3 * min + 2 * s], ["sent", 3 * min, "Carrier: Northline · SM1f3a9c"]]),
},
{
id: "hook", label: "Webhook · order.paid", recipient: "https://api.kestrel.test/hooks/orders", channel: "webhook",
hops: ["created", "sent", "delivered"], budgets: { delivered: "5m" },
fallbacks: [{ action: "retry", label: "Retry now" }],
events: at([["created", 48 * s, "evt_3PqK81"], ["sent", 47 * s], ["delivered", 17 * s, "HTTP 503 Service Unavailable · retry 2 of 5 in 30 s", "retrying"]]),
},
{
id: "esign", label: "Master services agreement", recipient: "Li Wei · Kestrel Logistics", channel: "esign",
hops: ["created", "sent", "delivered", "viewed", "signed"],
events: at([["created", 41 * min], ["sent", 41 * min - 1 * s], ["delivered", 41 * min - 4 * s], ["viewed", 18 * min, "Web browser · Singapore"], ["signed", 6 * min, "Signature ID sig_92KD"]]),
},
{
id: "magic", label: "Magic sign-in link", recipient: "[email protected]", channel: "email",
events: at([["created", 95 * s], ["queued", 94.8 * s], ["sent", 93 * s], ["delivered", 90 * s, "250 OK · mx1.fjordcloud.test"], ["opened", 60 * s, "Webmail · desktop"]]),
},
];
list.messages = messages();
document.getElementById("dt-replay").addEventListener("click", () => { list.messages = messages(); });
list.addEventListener("mv-fallback", (e) => {
if (e.detail.action === "retry") {
e.detail.waitUntil(new Promise((r) => setTimeout(r, 600)).then(() => list.update("delivered", "done", { message: "hook", detail: "HTTP 200 OK · 184 ms" })));
}
if (e.detail.action === "resend") {
e.detail.waitUntil(new Promise((r) => setTimeout(r, 600)).then(() => {
list.reset("otp", { start: true });
setTimeout(() => list.update("sent", "done", { message: "otp", detail: "Carrier: Northline · SM1f40d2" }), 500);
setTimeout(() => list.update("delivered", "done", { message: "otp", detail: "DELIVRD · handset" }), 1600);
}));
}
if (e.detail.action === "sms") {
e.detail.waitUntil(new Promise((r) => setTimeout(r, 600)));
}
});
</script>
</div>Référence culturelle
Roméo et Juliette, William Shakespeare (1597, pièce). La lettre de frère Laurent qui explique le plan n’arrive jamais à Roméo, car le messager est retenu en quarantaine ; comme personne n’apprend que la livraison a échoué, la tragédie découle d’une non-arrivée silencieuse. Dans l’interface, chaque étape d’un message critique est observable et chronométrée, et une étape qui dépasse son budget devient un blocage visible et expliqué, avec des solutions de repli, plutôt qu’un silence que personne ne remarque.
API
Attributes
| Name | Type | Default | Description |
|---|---|---|---|
hops | comma list | created, queued, sent, delivered, opened | Hops of every message that doesn't declare its own (message.hops). Known ids get English labels and stall wording (created, queued, accepted, sent, delivered, opened, clicked, read, viewed, confirmed, signed, paid, processed); any other id is shown capitalized. |
budgets | "hop: time, …" ("queued: 10s, delivered: 2m, opened: 10m") | queued 30s · accepted 1m · sent 2m · delivered 5m · opened 30m | Time allowed between the previous hop and this one before it is a silent stall. Times accept ms, s, m/min, h, d or a bare number of ms. Per-message budgets and per-hop budget override it; hops without any budget never stall. |
fallbacks | "action: Label, …" | Fallback buttons offered during a stall or failure for messages that don't declare their own (message.fallbacks). Known actions get an icon: resend/retry, sms/text, copy/link, call/phone, email, push. | |
label / recipient / channel | string | Shorthand for a single message (id "default") when you don't set messages. channel (email, sms, push, webhook, esign, invoice, call or any string) picks the icon and channel-specific wording ("Delivered to the mail server", "The phone may be off"). | |
layout | auto | trail | list | auto | trail: every message fully expanded; list: compact rows (disclosure buttons) with mini tracks and totals; auto: trail for one message, list for several. |
announce | problems | all | none | problems | What the polite live region says: stalls, failures and late recoveries (problems), plus every hop reached and completion (all), or nothing. |
locale | BCP 47 | en-US | Locale of absolute timestamps (10:42:07 AM; month and day are added when not today). |
data-state / data-layout | failed | stalled | waiting | idle | complete | Set by the component on the host (worst state) and on each .mv-delivery-trail-item (that message's state). |
Properties
| Name | Type | Description |
|---|---|---|
messages | Array<{ id, label, recipient, channel, hops?: (string | { id, label?, budget? })[], budgets?: Record<hop, time> | string, fallbacks?: Fallback[] | string, hints?: Record<hop, string>, events?: Event[] }> | Replace every message (read: snapshots). Messages with the same id keep their open state and don't re-emit stalls already reported. A Fallback is { action, label, when?: "problem" | "stall" | "failed", href? (rendered as a link: tel:, mailto:, https:), copy? (text copied to the clipboard), icon?, variant?, done? (label shown after success) }. |
events | Array<{ message?, hop, status?, at?, detail? }> | Apply a batch of events in order (same rules as update()). Replaying events already applied is harmless. Read: the last 500 events applied. |
state | "failed" | "stalled" | "waiting" | "idle" | "complete" | Worst state across messages (read-only). |
strings | Partial<Record<string, string>> & { hops?, past?, missing?, hints? } | Overrides for every visible text and announcement. hops = hop labels, past = how a reached hop is phrased in a stall ("email:delivered": "Delivered to the mail server"), missing = how the awaited hop is phrased ("not opened"), hints = the probable cause ("email:opened": "It may be in spam…"); keys can be "hop" or "channel:hop". Other keys: stallText ({past} {ago}, {missing}. {hint}), stallTitle, failTitle, failText, state*, step*, note*, waiting, expected, late, totals*, fallback*, announce*. English defaults. |
hops / budgets / fallbacks / label / recipient / channel / layout / announce / locale | reflected | Mirror the attributes. |
Methods
| Name | Description |
|---|---|
update(hop, status = "done", { at?, detail?, message? }) | Record provider progress. status: done | failed (bounce, error: detail is shown as the reason) | retrying (deferred, soft bounce: marked on the awaited hop, the budget keeps running) | pending (undo). at: Date, epoch ms or ISO string (default now). A later hop marks earlier ones as reached (out-of-order webhooks). message defaults to the only message. Also accepts one object { message, hop, status, at, detail }. Returns true if applied. |
addMessage(message) / removeMessage(id) | Add (or replace by id) one message; remove one. addMessage returns the id. |
reset(id?, { start?, at?, detail? }) | Clear a message's progress (before a resend); start: true marks its first hop done now (or at). |
get(id?) | Snapshot { id, label, recipient, channel, state, hop, elapsed, budget, overdue, hops[] } of one message. |
Events
| Name | Description |
|---|---|
mv-stall | A hop exceeded its budget without progress (once per hop and attempt). detail: { message, hop, elapsed, budget, since, initial } (initial: already stalled when the data was loaded, not announced). |
mv-fallback | Cancelable. A fallback button was pressed. detail: { message, action, hop, state, fallback, waitUntil(promise) }. waitUntil shows a busy button, then a brief check (or an error, announced). preventDefault() cancels the default behavior (link navigation, clipboard copy). |
mv-fail | A hop failed. detail: { message, hop, detail, at, initial }. |
mv-recover | A stalled hop finally arrived. detail: { message, hop, late (ms past the budget) }. |
mv-progress | A hop changed status through update() or events. detail: { message, hop, status, at, detail }. |
mv-complete | Every hop of a message is reached. detail: { message }. |
Content structure
| Name | Description |
|---|---|
(JSON) | An optional child <script type="application/json"> holding an array of messages or { messages, events } is read on first connection (server-rendered pages). |
CSS classes
| Name | Description |
|---|---|
mv-delivery-trail-item | One message (<li>, data-state). Contains -head (a disclosure <button class="mv-delivery-trail-summary"> in list layout): -icon, -label, -recipient, -track/-tick (mini track, aria-hidden), -pill, -note, -chevron; then -body. |
mv-delivery-trail-steps / -step | The ordered list of hops; each step has data-status (done | waiting | stalled | failed | pending | skipped), data-rail (line to the next hop: done | flow | stall | fail | idle | end), data-late, aria-current on the awaited hop. Parts: -marker, -rail/-rail-fill, -name, -word, -time, -delta, -meta, -detail. |
mv-delivery-trail-callout | Stall or failure box inside the problem hop (data-tone): -callout-title, -callout-text, -callout-reason (bounce text), -actions with .mv-delivery-trail-fallback buttons (data-action, data-state pending | done | error). |
mv-delivery-trail-totals | Counts line above the list layout (-total, -count[data-tone]). |
CSS variables
| Name | Default | Description |
|---|---|---|
--mv-delivery-trail-ok | var(--mv-success) | Reached hops and complete messages. |
--mv-delivery-trail-active | var(--mv-accent) | The awaited hop and the line filling toward it. |
--mv-delivery-trail-stall | var(--mv-warning) | Silent stalls, retries and late arrivals. |
--mv-delivery-trail-fail | var(--mv-danger) | Failures and bounces. |
--mv-delivery-trail-stall-fg | the stall color mixed 78% toward near-black | Text and icons on the solid stall fill (Stalled word, stalled marker). |
--mv-delivery-trail-fail-fg | white in light theme, a near-black red in dark theme | Text and icons on the solid fail fill (Failed word, failed marker). Set it when you change --mv-delivery-trail-fail, to keep 4.5:1. |
Accessibility
Each message's hops are a real ordered list (<ol>) and every step carries its status in words, not only color: a visually hidden “Step 3 of 5”, the hop name, a status word (visible for Waiting, Retrying, Stalled, Failed, Not reached; spoken only for Done and Pending, whose check or empty ring shows it), the timestamp in a <time datetime> element and the provider detail. The awaited, stalled or failed hop has aria-current="step". Stalls, failures and late recoveries are announced once in a polite live region (“Password reset email: stalled at Opened. Delivered to the mail server 12 min ago, not opened. It may be in spam or a promotions folder.”); announce="all" adds every hop reached, announce="none" silences it; data loaded already stalled is shown but not announced. The stall box is a labelled group; fallbacks are real <button>s (or <a> for tel:/mailto: links) whose visible label says the action and whose aria-describedby points at the stall explanation; while waitUntil() runs they are aria-busy and aria-disabled, and success or failure is announced. In the list layout each row is a disclosure <button> (aria-expanded, aria-controls) named from the label, recipient, state and note; the list keeps worst-first order, and focus is restored when rows move or a stall box disappears (to the row, or to the trail). Icons are decorative (aria-hidden); every tone comes with an icon and a word, and forced-colors mode draws markers, rails and callouts with system colors. Reduced motion (OS or data-motion="reduce"): no breathing dots, beacon or row sliding; the line toward the awaited hop steps once per second instead of flowing.