Range
A bounded native numeric slider with visible output.
stable · light DOM · 4.0.0. Visible native controls retain FormData, labels, constraints, disabled fieldsets and reset. No duplicate form-value mechanism is installed.
Live variants
default
<j3w1-range id="example-range-default"><div class="range"><label for="example-range-default-range-value">Preview volume</label><input id="example-range-default-range-value" name="example-range-default-volume" type="range" min="0" max="100" step="5" value="40" data-demo-focus-target=""><output for="example-range-default-range-value">40</output></div></j3w1-range>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/range.css';
import '@j3w1/ui/register/range';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 range --out ./vendor/j3w1/rangeThe 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. |
value | CustomEvent | Forwards value to the primary native control. |
required | CustomEvent | Forwards required to the primary native control. |
readonly | CustomEvent | Forwards readonly to the primary native control. |
checked | CustomEvent | Forwards checked to the primary native control. |
properties
| Name | Type / signature | Meaning |
|---|---|---|
disabled | boolean | Delegates disabled state to native children. |
name | string | Native control name; application form keys remain explicit. |
value | string | Primary native value; assignment does not fabricate user events. |
checked | boolean | Native checkbox state. |
required | boolean | Native required constraint. |
readOnly | boolean | Native readonly property. |
form | HTMLFormElement | null | Owning native form. Read only. |
methods
| Name | Type / signature | Meaning |
|---|---|---|
refresh | (): void | Reconnect behavior after replacing native child structure. |
focus | (options?: FocusOptions): void | Focus the first usable native control. |
checkValidity | (): boolean | Check owned native constraints. |
reportValidity | (): boolean | Report the first invalid owned control. |
clear | (): void | Clear an editable primary input and emit native input/change. |
events
| Name | Type / signature | Meaning |
|---|---|---|
j3w1-change | CustomEvent | Native change from an owned control, alongside the original native event. |
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
Range range
A bounded native numeric slider with visible output.
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.surface.inputapproveduse | #000000 | Form-control fill. |
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-color-action-primary-bg | color.action.primary.bgapproveduse | #7d1310 | Primary button fill; D-026 darkened it off color12, which stays fixed as heritage ANSI 12. |
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-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-2 | space.2observeduse | 2px | |
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 | |
focus-visible | |
disabled |
Purpose
A bounded numeric value on a native slider with a visible output.
Anatomy
Parts as listed in the anatomy.
States
| State | Visual | Non-colour channel |
|---|---|---|
| default | named content on the default surface | native text and structure |
| focus-visible | dashed focus ring | native focus position |
| disabled | disabled foreground, background and border at full opacity | native disabled state blocks activation |
Keyboard
Native, as in the key table.
Accessibility
The input keeps its accessible name and native value semantics; the output never replaces the label. Units go in the label or help text. Focus alone never changes the value.
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. An invented service success.
Contrast report
5 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 |
|---|---|---|---|---|---|---|---|
| range default text | default | text | color.text.default #e99499 | color.surface.default #0d0707 | 8.72 | 4.5 | pass |
| range 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 |
Keys
| Key | Action |
|---|---|
| Tab / Shift+Tab | Reach and leave the slider. |
| Arrow keys / Home / End | Use native stepping, minimum and maximum behavior. |
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