Slider

Bounded quantity with keyboard and text alternative; steps and units are declared.

FamilyinputLicenseApache-2.0

StandaloneAvailable

Use the web element directly without the semantic runtime.

Semantic bindingAvailable

A registered presentation adapter can bind this component to host-owned meaning and state.

Automatic adaptationNo standard recipe

The standard recipe resolver does not select this component automatically.

Import and live example

One confidence slider at 75 percent with five-point increments.

Interactive preview requires JavaScript.

View the complete example source

import {registerAeliqoElements} from "@varendo/web";
import {
  AeliqoCheckboxElement,
  AeliqoComboboxElement,
  AeliqoDateFieldElement,
  AeliqoDateRangeElement,
  AeliqoFieldGroupElement,
  AeliqoFileInputElement,
  AeliqoFormElement,
  AeliqoNumberFieldElement,
  AeliqoRadioGroupElement,
  AeliqoSearchFieldElement,
  AeliqoSelectElement,
  AeliqoSliderElement,
  AeliqoSwitchElement,
  AeliqoTextAreaElement,
  AeliqoTextFieldElement,
  type AeliqoOption,
} from "@varendo/web/inputs";

const options: readonly AeliqoOption[] = [
  {value: "ada", label: "Ada Lovelace", description: "Research"},
  {value: "grace", label: "Grace Hopper", description: "Product"},
  {value: "lin", label: "Lin Chen", disabled: true},
];

registerAeliqoElements();

const host = document.querySelector<HTMLElement>("#aeliqo-example") ?? (() => {
  const created = document.createElement("div");
  created.id = "aeliqo-example";
  (document.body ?? document.documentElement).append(created);
  return created;
})();

function createCatalogRoot(container: HTMLElement): HTMLElement {
  const root = document.createElement("div");
  root.dataset.catalogSourceRoot = "true";
  root.style.display = "grid";
  root.style.gap = "12px";
  container.append(root);
  return root;
}

function createCatalogElement<T extends HTMLElement>(tagName: string, container: HTMLElement): T {
  const element = document.createElement(tagName) as T;
  element.setAttribute("data-aeliqo-theme", "light");
  container.append(element);
  return element;
}

function appendSlottedText(root: HTMLElement, slot: string, textContent: string): void {
  const content = document.createElement("span");
  content.slot = slot;
  content.textContent = textContent;
  root.append(content);
}

const root = createCatalogRoot(host);
(((root) => {
		const element = createCatalogElement<AeliqoSliderElement>("aeliqo-slider", root);
		element.label = "Confidence";
		element.name = "confidence";
		element.min = 0;
		element.max = 100;
		element.step = 5;
		element.value = 75;
		element.unit = "%";
	}))(root);

Purpose

A native range control paired with an editable numeric field for one bounded quantity. The host can set value; either control updates that local property and shows its unit. min, max, and step constrain edits, while the host decides what to retain or persist.

When to use it

People adjust a quantity inside declared bounds, such as volume or confidence.
A range is useful, but people also need to enter an exact value directly.
The current value and unit should stay visible beside the track and numeric field.

When to use a different component

Use NumberField when a range control would not help people choose the value.
Use Form when the value submits alongside other fields.

Properties and defaults

The host supplies numerical bounds and unit; each change is a proposal for host state.

Properties, ownership, and initial values
Property	Use and ownership	Declared type	Initial value
`label`	Provides the visible label and accessible name for the component.	`string`	`''`
`description`	Provides supporting text associated with the control or value.	`string`	`''`
`error`	Provides the current validation or operation error associated with the control.	`string`	`''`
`required`	Marks the control as required for validation and native accessibility semantics.	`boolean`	`false`
`disabled`	Prevents user interaction while keeping the control and its current value visible.	`boolean`	`false`
`readOnly`	Keeps the current value focusable and readable while preventing edits.	`boolean`	`false`
`name`	Provides the stable form or action name used by the host to identify this control.	`string`	`''`
`autocomplete`	Passes an autocomplete purpose to the native input so browsers can offer an appropriate saved value.	`string`	`'off'`
`locale`	Selects locale-sensitive formatting and parsing behavior.	`string`	`'en-US'`
`validationState`	Controls the current idle, pending, valid, or invalid validation state.	`AeliqoValidationState`	`'idle'`
`validator`	Runs host-provided synchronous validation for a proposed input value.	`AeliqoValidator<T> \| undefined`	`undefined`
`value`	Controls the current value. Apply accepted user proposals back to this property.	`number`	`0`
`defaultValue`	Provides the initial uncontrolled value. Later updates come from component interaction.	`number`	`0`
`min`	Sets the lower bound for min.	`number`	`0`
`max`	Sets the upper bound for max.	`number`	`100`
`step`	Sets the permitted numeric or split-position increment.	`number`	`1`
`unit`	Provides the unit label associated with the numeric value.	`string`	`''`

Events

Events, payloads, timing, and application responsibilities
Event	Payload	Emitted	Application responsibility
`aeliqo-input-change`	`{source, value, composing?}`	Whenever the user proposes a draft value change.	Validate or store the draft and reassign controlled `value` or `checked` state.
`aeliqo-input-commit`	`{source, value}`	After explicit commit, blur, or Enter where the control supports it.	Accept or reject the committed value and update authoritative form state.
`aeliqo-validation`	`{source, state, message}`	When validation enters pending, valid, or invalid state.	Merge the result with application validation and display authoritative errors.

Events cross the component boundary as user proposals. Validate their detail and current authority before applying a business effect.

Listen for `aeliqo-input-change`

TypeScript example

const element = document.querySelector('aeliqo-slider');<p>element?.addEventListener('aeliqo-input-change', (event) => {
  const proposal = (event as CustomEvent<unknown>).detail;
  // Validate the proposal, update host state, then assign controlled properties.
  applyProposal(proposal);
});

Listen for `aeliqo-input-commit`

TypeScript example

const element = document.querySelector('aeliqo-slider');</p>
<p>element?.addEventListener('aeliqo-input-commit', (event) => {
  const proposal = (event as CustomEvent<unknown>).detail;
  // Validate the proposal, update host state, then assign controlled properties.
  applyProposal(proposal);
});

Listen for `aeliqo-validation`

TypeScript example

const element = document.querySelector('aeliqo-slider');</p>
<p>element?.addEventListener('aeliqo-validation', (event) => {
  const proposal = (event as CustomEvent<unknown>).detail;
  // Validate the proposal, update host state, then assign controlled properties.
  applyProposal(proposal);
});

States and failure handling

Relevant states:

ready
disabled
invalid
pending

Expected result: The value remains on the declared step grid and is announced with its unit.

Changing value or unit or replacing validator cancels validation for the previous value and clears its validator-owned error. An independently supplied host error survives the change. Late results after a reset or disconnect are ignored.

Keyboard, focus, and accessibility

Keyboard behavior:

Tab
Arrow keys
Page Up and Page Down
Home and End

Exposed semantics:

aria-describedby
aria-invalid
aria-label
aria-readonly
input
role

Responsive behavior

Give the track its own row in narrow forms. Keep its numeric label and unit visible as the viewport shrinks.

Style hooks

Shadow parts: description, error, field, input, label, pending, text-input, unit
Varendo design tokens referenced: --aeliqo-color-accent, --aeliqo-control-min-target, --aeliqo-space-8

Generated TypeScript declaration

View generated declaration

export declare class AeliqoSliderElement extends AeliqoFieldElement<AeliqoSliderValue> {
    static readonly properties: {
        label: {
            type: StringConstructor;
        };
        description: {
            type: StringConstructor;
        };
        error: {
            type: StringConstructor;
        };
        required: {
            type: BooleanConstructor;
            reflect: boolean;
        };
        disabled: {
            type: BooleanConstructor;
            reflect: boolean;
        };
        readOnly: {
            attribute: string;
            type: BooleanConstructor;
            reflect: boolean;
        };
        name: {
            type: StringConstructor;
            reflect: boolean;
        };
        autocomplete: {
            type: StringConstructor;
        };
        locale: {
            type: StringConstructor;
        };
        validationState: {
            attribute: string;
            type: StringConstructor;
            reflect: boolean;
        };
        validator: {
            attribute: boolean;
        };
        value: {
            type: NumberConstructor;
            reflect: boolean;
        };
        defaultValue: {
            attribute: string;
            type: NumberConstructor;
        };
        min: {
            type: NumberConstructor;
        };
        max: {
            type: NumberConstructor;
        };
        step: {
            type: NumberConstructor;
        };
        unit: {
            type: StringConstructor;
        };
    };
    value: number;
    defaultValue: number;
    min: number;
    max: number;
    step: number;
    unit: string;
    connectedCallback(): void;
    protected updated(): void;
    protected isCurrentValidationValue(value: AeliqoSliderValue): boolean;
    protected resetField(): void;
    protected render(): import("lit").TemplateResult<1>;
    focus(options?: FocusOptions): void;
    private readonly handleRange;
    private readonly handleText;
    private readonly handleCommit;
    private applyUserValue;
    private isValid;
    private safeStep;
    private safeNumber;
    private nativeRange;
    private syncNative;
    static readonly styles: import("lit").CSSResult[];
}

Version

This page documents the Varendo 0.6 component contract.

Import and live example#

Purpose#

When to use it#

When to use a different component#

Properties and defaults#

Events#

Listen for aeliqo-input-change

Listen for aeliqo-input-commit

Listen for aeliqo-validation

States and failure handling#

Keyboard, focus, and accessibility#

Responsive behavior#

Style hooks#

Related components#

Generated TypeScript declaration#

Version#

Import and live example

Purpose

When to use it

When to use a different component

Properties and defaults

Events

Listen for `aeliqo-input-change`

Listen for `aeliqo-input-commit`

Listen for `aeliqo-validation`

States and failure handling

Keyboard, focus, and accessibility

Responsive behavior

Style hooks

Related components

Generated TypeScript declaration

Version