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Merged
t3dotgg merged 3 commits into from
Oct 26, 2026
+573 −81
Merged

feat(web): "failed to start" screen helps users recover and report the crash #25345

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83d00e2
feat(web): boot failure screen helps users recover and report
t3dotgg Oct 26, 2026
8d0f5ff
fix(web): boot failure screen scrolls, copies on http, and reports up…
t3dotgg Oct 26, 2026
a07940a
fix(web): tighten boot error header, announcements, and update note
t3dotgg Oct 26, 2026
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179 changes: 148 additions & 31 deletions apps/web/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -439,13 +439,23 @@
object-fit: contain;
}

/* App CSS locks body and #root scrolling once main loads, so the error screen scrolls itself. */
#boot-shell:has(> #boot-error) {
height: 100%;
overflow-x: hidden;
overflow-y: auto;
}

#boot-error {
--boot-error-fg: #262626;
--boot-error-bg: #ffffff;
--boot-error-line: color-mix(in srgb, currentColor 12%, transparent);
display: flex;
flex-direction: column;
align-items: flex-start;
align-self: flex-start;
width: min(400px, calc(100% - 48px));
padding: clamp(24px, 22vh, 220px) 0 24px;
font-size: 13px;
line-height: 20px;
}
Expand All @@ -469,86 +479,193 @@

#boot-error p {
margin: 4px 0 0;
opacity: 0.6;
opacity: 0.7;
overflow-wrap: anywhere;
text-wrap: pretty;
}

#boot-error code {
#boot-error code,
#boot-error pre {
font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
font-size: 12px;
overflow-wrap: anywhere;
}

#boot-error a {
color: inherit;
text-decoration-line: underline;
text-decoration-color: color-mix(in srgb, currentColor 40%, transparent);
text-underline-offset: 3px;
}

#boot-error a:hover {
text-decoration-color: currentColor;
}

#boot-error button {
border: 0;
height: 32px;
padding: 0 14px;
border: 1px solid var(--boot-error-line);
border-radius: 6px;
background: transparent;
color: inherit;
font: inherit;
font-weight: 500;
cursor: pointer;
}

#boot-error button:focus-visible {
#boot-error button[aria-disabled="true"] {
opacity: 0.6;
cursor: default;
}

#boot-error :is(button, a, summary, pre):focus-visible {
outline: 2px solid var(--boot-error-fg);
outline-offset: 2px;
}

#boot-error-actions {
display: flex;
flex-wrap: wrap;
gap: 8px;
margin-top: 16px;
}

#boot-error #boot-error-reload {
border-color: var(--boot-error-fg);
background: var(--boot-error-fg);
color: var(--boot-error-bg);
}

#boot-error-reload:hover {
opacity: 0.9;
}

#boot-error #boot-error-update-note {
margin-top: 8px;
font-size: 12px;
line-height: 18px;
}

#boot-error details {
width: 100%;
margin-top: 32px;
}

#boot-error summary {
display: inline-flex;
align-items: center;
gap: 8px;
border-radius: 4px;
list-style: none;
opacity: 0.7;
cursor: pointer;
}

#boot-error summary::-webkit-details-marker {
display: none;
}

#boot-error summary::before {
content: "";
width: 5px;
height: 5px;
border-right: 1.5px solid currentColor;
border-bottom: 1.5px solid currentColor;
transform: rotate(-45deg);
}

#boot-error details[open] summary::before {
transform: rotate(45deg);
}

#boot-error summary:hover,
#boot-error details[open] summary {
opacity: 1;
}

#boot-error details > :not(summary) {
display: grid;
gap: 8px;
margin-top: 20px;
}

#boot-error details > a {
display: block;
width: fit-content;
}

#boot-error details p {
margin: 0;
font-size: 12px;
line-height: 18px;
}

#boot-error-command {
display: flex;
align-items: center;
gap: 8px;
box-sizing: border-box;
width: 100%;
padding: 4px 4px 4px 10px;
border: 1px solid color-mix(in srgb, currentColor 10%, transparent);
border: 1px solid var(--boot-error-line);
border-radius: 6px;
}

#boot-error-command code {
flex: 1;
min-width: 0;
opacity: 0.8;
user-select: all;
}

#boot-error-copy {
#boot-error .boot-error-icon {
display: grid;
flex: none;
place-items: center;
width: 24px;
min-width: 24px;
height: 24px;
padding: 0 4px;
border: 0;
border-radius: 4px;
background: transparent;
color: inherit;
opacity: 0.6;
font-size: 12px;
font-weight: 400;
opacity: 0.7;
}

#boot-error-copy:hover {
#boot-error .boot-error-icon:hover {
opacity: 1;
background: color-mix(in srgb, currentColor 8%, transparent);
}

#boot-error-triage {
width: 100%;
margin-top: 40px;
#boot-error-details {
max-height: 200px;
margin: 0;
padding: 10px 12px;
overflow: auto;
border: 1px solid var(--boot-error-line);
border-radius: 6px;
font-size: 11px;
line-height: 16px;
white-space: pre-wrap;
opacity: 0.8;
}

#boot-error-triage p {
margin: 0 0 8px;
font-size: 12px;
line-height: 18px;
#boot-error-report {
display: flex;
align-items: center;
gap: 16px;
}

#boot-error-reload {
height: 32px;
margin-top: 16px;
padding: 0 14px;
border-radius: 6px;
background: var(--boot-error-fg);
color: var(--boot-error-bg);
font-weight: 500;
#boot-error-report button {
height: 28px;
padding: 0 10px;
}

#boot-error-reload:hover {
opacity: 0.9;
.boot-error-sr {
position: absolute;
width: 1px;
height: 1px;
overflow: hidden;
clip-path: inset(50%);
white-space: nowrap;
}
</style>
<title>T3 Code (Beta)</title>
Expand Down
83 changes: 81 additions & 2 deletions apps/web/src/lib/bootError.test.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,12 @@
import type { DesktopBridge, DesktopCliCommandState } from "@t3tools/contracts";
import type { DesktopBridge, DesktopCliCommandState, DesktopUpdateState } from "@t3tools/contracts";
import { describe, expect, it, vi } from "vite-plus/test";

import { resolveTriageCommand } from "./bootError";
import {
type BootErrorEnvironment,
buildErrorReport,
resolveTriageCommand,
updateActionFor,
} from "./bootError";

const desktopWith = (getState: () => Promise<DesktopCliCommandState>) =>
({ cliCommand: { getState } }) as unknown as DesktopBridge;
Expand Down Expand Up @@ -52,3 +57,77 @@ describe("resolveTriageCommand", () => {
).resolves.toBe("npx t3 triage");
});
});

const environment: BootErrorEnvironment = {
version: "0.1.3-nightly.20261026.3707",
channel: "nightly",
surface: "web",
platform: "MacIntel",
userAgent: "Test",
time: "2026-10-26T00:00:00.000Z",
};

describe("buildErrorReport", () => {
it("drops hosts and tokens from URLs in the error", () => {
const error = new TypeError(
"Failed to fetch dynamically imported module: http://studio.tail1234.ts.net:3773/assets/a.js?pair=SECRET#token=SECRET",
{
cause: new Error(
"ws://studio.tail1234.ts.net:3773/ws?token=SECRET closed, main-a.js?sig=SECRET",
),
},
);
error.stack = `TypeError: ${error.message}\n at http://studio.tail1234.ts.net:3773/src/main.tsx?t=1:10:5`;
const report = buildErrorReport(error, environment);
expect(report).not.toContain("SECRET");
expect(report).not.toContain("tail1234");
expect(report).toContain("module: /assets/a.js\n at /src/main.tsx:10:5");
expect(report).toContain("Caused by: Error: /ws closed, main-a.js");
expect(report).toContain("Version: 0.1.3-nightly.20261026.3707");
});

it("keeps the header when a Firefox stack frame starts with the error name", () => {
const error = new Error("boot failed");
error.stack = "ErrorBoundary@/assets/main.js:1:2";
expect(buildErrorReport(error, environment)).toMatch(
/^Error: boot failed\nErrorBoundary@\/assets\/main.js:1:2\n/,
);
const unnamed = new Error();
unnamed.stack = "ErrorBoundary@/assets/main.js:1:2";
expect(buildErrorReport(unnamed, environment)).toMatch(/^Error\nErrorBoundary@/);
});

it("stops at cause cycles and survives values that are not errors", () => {
const loop = new Error("outer");
loop.cause = loop;
expect(buildErrorReport(loop, environment).match(/outer/g)).toHaveLength(1);
expect(buildErrorReport("plain text", environment)).toMatch(/^plain text\n/);
expect(buildErrorReport({ code: 42 }, environment)).toMatch(/^\{"code":42\}\n/);
expect(buildErrorReport(Object.create(null), environment)).toMatch(/^\{\}\n/);
expect(buildErrorReport(undefined, environment)).toMatch(/^\(no error message\)\n/);
});

it("cuts long errors but keeps the environment", () => {
const report = buildErrorReport("x".repeat(20_000), environment);
expect(report).toContain("[truncated]");
expect(report.length).toBeLessThan(7_000);
expect(report).toContain("Time: 2026-10-26T00:00:00.000Z");
});
});

describe("updateActionFor", () => {
it("offers an action only when a newer build exists", () => {
const state = (status: DesktopUpdateState["status"], downloadPercent: number | null = null) =>
({ status, downloadPercent }) as DesktopUpdateState;
expect(updateActionFor(state("available"))).toEqual({ kind: "download" });
expect(updateActionFor(state("downloading", 41.6))).toEqual({
kind: "downloading",
percent: 42,
});
expect(updateActionFor(state("downloaded"))).toEqual({ kind: "install" });
for (const status of ["disabled", "idle", "checking", "up-to-date", "error"] as const) {
expect(updateActionFor(state(status))).toBeNull();
}
expect(updateActionFor(undefined)).toBeNull();
});
});
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