Error state
A specific failure explanation with an explicit recovery request.
stable · light DOM · 4.0.0. Light DOM retains static content, native semantics, label relationships and host composition without duplicating controls.
Live variants
default
✕ Project list unavailable
The demonstration request failed. Retry to load the local example records.
<j3w1-error-state id="example-error-state-default"><section class="error-state" aria-labelledby="example-error-state-default-error-title"><h3 id="example-error-state-default-error-title">✕ Project list unavailable</h3><p>The demonstration request failed. Retry to load the local example records.</p><button class="error-state-control" type="button" data-retry="" data-demo-focus-target="">Retry loading</button></section></j3w1-error-state>Install and register
Use the exact version. If npm publication is pending, install the release tarball from the installation guide.
npm install --save-exact @j3w1/ui@4.0.0import '@j3w1/ui/tokens.css';
import '@j3w1/ui/styles/error-state.css';
import '@j3w1/ui/register/error-state';Insert the maintained markup above after loading these imports. Its native children provide accessible names and form behavior; the empty custom tag alone does not create a control.
Copy the complete implementation
npx --package=@j3w1/ui@4.0.0 j3w1-ui copy error-state --out ./vendor/j3w1/error-stateThe CLI verifies every file before writing and refuses overwrites. Serve the output over HTTP and open index.html. Keep its modules, CSS, tokens and licence notices together.
Public API
attributes
| Name | Type / signature | Meaning |
|---|---|---|
disabled | CustomEvent | Disable the native controls owned by this instance. |
loading | CustomEvent | Mark the primary control busy and prevent duplicate activation. |
properties
| Name | Type / signature | Meaning |
|---|---|---|
disabled | boolean | Delegates disabled state to native children. |
name | string | Native control name; application form keys remain explicit. |
methods
| Name | Type / signature | Meaning |
|---|---|---|
refresh | (): void | Reconnect behavior after replacing native child structure. |
focus | (options?: FocusOptions): void | Focus the first usable native control. |
dismiss | (id?: string): void | Dismiss a message; focused actions move to the next available control. |
events
| Name | Type / signature | Meaning |
|---|---|---|
j3w1-dismiss | CustomEvent | Cancelable message dismissal. |
j3w1-retry | CustomEvent | Request recovery; the host owns the result. |
j3w1-action | CustomEvent | An explicit message action. |
Dependencies and verification
Registered components: none. Style dependencies: none.
Package presence establishes an available implementation. Actual passes depend on the tested artifact and environment. Read specification execution evidence; read packed-consumer evidence; inspect the complete state matrix.
Full implementation manifest, API and token dependency closure
Canonical specification
Error state error-state
A specific failure explanation with an explicit recovery request.
Report an issue with this component
Tokens
Focus a role to inspect its values; follow its link for persistent usage and source details.
| Part | Role | Value | Use |
|---|---|---|---|
root.bg | color.surface.defaultapproveduse | #0d0707 | D-041 surface.default: color.primitive.modern.panel. |
root.text | color.text.defaultapproveduse | #e99499 | D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills. |
root.border | color.border.controlapproveduse | #c81a1a | D-041 owner correction: red control and floating-frame borders, distinct from rose text. |
heading.text | color.text.brightapproveduse | #ffa2a7 | D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills. |
secondary.text | color.text.mutedapproveduse | #d4868b | D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills. |
control.bg | color.action.secondary.bgobserveduse | rgb(0 0 0 / 0%) | Secondary button has no fill. |
control.text | color.action.secondary.textapproveduse | #ffa2a7 | D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills. |
control.border | color.action.secondary.borderapproveduse | #986f72 | D-041 action.secondary.border: color.primitive.modern.control. |
control.bg-hover | color.action.secondary.hover-bgobserveduse | #630f0d | Secondary button hover. |
control.bg-active | color.action.secondary.pressed-bgobserveduse | #420f0c | Secondary button pressed. |
control.border-active | color.border.activeobserveduse | #e53935 | Active or focused control border. |
control.focus | color.interaction.focus.ringobserveduse | #e53935 | 1px dashed focus ring on controls and rows. |
dependency.role-border-width-default | border.width.defaultobserveduse | 1px | Every border is 1px. |
dependency.role-border-width-emphasis | border.width.emphasisobserveduse | 2px | Selected indicator, sticky header rule, invalid border. |
dependency.role-color-border-disabled | color.border.disabledapproveduse | #482b2b | D-041 border.disabled: color.primitive.modern.divider. |
dependency.role-color-interaction-disabled-bg | color.interaction.disabled.bgapproveduse | #0d0707 | D-041 interaction.disabled.bg: color.primitive.modern.panel. |
dependency.role-color-status-danger-border | color.status.danger.borderobserveduse | #e53935 | Danger border, 2px on invalid inputs. |
dependency.role-color-status-danger-text | color.status.danger.textobserveduse | #f07178 | D-041 readable error text on neutral surfaces and native warning tints. |
dependency.role-color-text-disabled | color.text.disabledapproveduse | #a3676b | D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills. |
dependency.role-density-comfortable-control-height | density.comfortable.control-heightobserveduse | 32px | |
dependency.role-density-compact-control-height | density.compact.control-heightobserveduse | 24px | |
dependency.role-focus-offset | focus.offsetobserveduse | -2px | outline-offset for controls. |
dependency.role-radius-none | radius.noneobserveduse | 0px | The only radius. Nothing is rounded. |
dependency.role-space-12 | space.12observeduse | 12px | |
dependency.role-space-8 | space.8observeduse | 8px |
State matrix
Every declared state and combination, statically rendered; the default cell is live. Sizes: compact, comfortable (switch with the density control above).
| State | Default |
|---|---|
default | ✕ Project list unavailableThe demonstration request failed. Retry to load the local example records. |
error | |
loading | |
disabled | |
focus-visible |
Purpose
Explains a failed operation and asks for an explicit recovery; it never claims the service recovered.
Anatomy
Parts as listed in the anatomy.
States
| State | Visual | Non-colour channel |
|---|---|---|
| default | Danger border and text heading. Its buttons are the secondary button (button.md). | Specific written explanation and error glyph. |
| error | Same explicit failure treatment. | Failure text remains available. |
| loading | Busy status accompanies the existing explanation. | aria-busy and host-provided pending text. |
| disabled | Disabled roles at full opacity. | Native retry button is disabled. |
| focus-visible | Dashed ring. | Native keyboard focus. |
Keyboard
As in the key table.
Accessibility
Never rely on colour or the glyph alone. Give the retry action a specific name. Announce a new error in a host status region without repeatedly interrupting reading. Keep focus unless recovery needs an explicit next step.
Portability
Follows the shared component defaults in spec/portability.md (section “Shared component defaults”).
Non-examples
Unlabelled controls, colour-only status, drag-only operations, hidden required instructions, stolen focus or an invented service success.
Contrast report
7 declared pairs measured on resolved sRGB values with the WCAG 2.x formula; 0 waived (decorative only), 0 failing. A pass is a design target for the named role, not an application-wide conformance claim.
| Pair | State | Kind | Foreground | Background | Ratio | Min | Result |
|---|---|---|---|---|---|---|---|
| error-state default text | default | text | color.text.default #e99499 | color.surface.default #0d0707 | 8.72 | 4.5 | pass |
| error-state default border | default | ui | color.border.control #c81a1a | color.surface.default #0d0707 | 3.44 | 3 | pass |
| Primary content | — | text | color.text.default #e99499 | color.surface.default #0d0707 | 8.72 | 4.5 | pass |
| Supporting content | — | text | color.text.muted #d4868b | color.surface.default #0d0707 | 7.22 | 4.5 | pass |
| Control boundary | — | ui | color.border.control #c81a1a | color.surface.default #0d0707 | 3.44 | 3 | pass |
| Button label | — | text | color.action.secondary.text #ffa2a7 | color.surface.default #0d0707 | 10.45 | 4.5 | pass |
| Button label on hover | — | text | color.action.secondary.text #ffa2a7 | color.action.secondary.hover-bg #630f0d | 6.84 | 4.5 | pass |
Keys
| Key | Action |
|---|---|
| Tab / Shift+Tab | Reach the recovery action. |
| Enter / Space | Request a retry without moving focus. |
For agents
Component JSON ·Implementation brief ·Build a task kit ·
Stress fixtures: FX-320 FX-360 FX-ZOOM-200 FX-I18N FX-RTL FX-RM FX-HC FX-TOUCH FX-DENSITY FX-STATE-MATRIX