Radio options built on native inputs, grouped into one value with keyboard navigation.
c2-radio is one option: a native <input type="radio"> with its label beside it and an optional description slot underneath. c2-radio-group turns several of them into a single control with one value and one name, disables them together, and restores the native keyboard model across the shadow boundary: Arrow keys move and select, and only the selected option is a tab stop. Radios can sit anywhere inside the group, including in wrapper elements. Standalone radios sharing a name in the same root still uncheck each other, but only the group provides arrow-key navigation and a single change event with the new value.
Installation
npm install @c2n/radio
Importing @c2n/radio registers both c2-radio-group and c2-radio.
Usage
Plan
MonthlyYearly
ShippingDelivery estimates are for business days.Standard3–5 days, free over $50Express1–2 days, $9Store pickupReady in 2 hours
EnabledChecked and disabledDisabledWhole group disabledOneTwo
FreeFor personal projectsProUnlimited projects, priority supportTeamShared workspaces and SSO
Set the group’s value to select an option from code, or set checked on a radio: the group adopts it and unchecks the rest. Listen for change on the group (detail.value); the options’ own change events are stopped at the group so a listener above it hears exactly one event per selection. Every option needs a value, and an option without a checked sibling leaves the group value empty.
The inner inputs live in shadow roots, so they do not take part in a surrounding <form>; read value from the group on submit or mirror it into a hidden input. The label slot names the group for assistive technology (aria-label works too); give a standalone radio without visible text an aria-label.
The indicator is not tied to the ring. --c2-radio__control--border-radius reshapes the ring and its dot (a square control at 4px); the dot slot replaces the filled dot with a mark such as a check, drawn in --c2-radio__dot--color; and the icon and checked-icon slots replace the whole control with an icon per state, coloured by --c2-radio__icon--color and --c2-radio__icon__checked--color and sized by --c2-radio__icon--size. With only icon, the same icon shows in both states and changes colour; with only checked-icon, the ring stays for the unchecked state. Hide that ring with --c2-radio__control--border: none and move the indicator after the text with --c2-radio__container--flex-direction: row-reverse to get a menu-style check list, as in the row above.
Theme the control with --c2-radio__control--* and --c2-radio__dot--* (an accent border with a transparent fill gives the outlined look), the text with --c2-radio__label--* and --c2-radio__description--*, and the whole row with --c2-radio__container--* for card-style options. Set those variables on the group and every option inherits them, as in the Cards row above; add --c2-radio-group--align-items: stretch so the cards fill the width.
Radio
Radio options built on native inputs, grouped into one value with keyboard navigation.
c2-radio is one option: a native <input type="radio"> with its label beside it and an optional description slot underneath. c2-radio-group turns several of them into a single control with one value and one name, disables them together, and restores the native keyboard model across the shadow boundary: Arrow keys move and select, and only the selected option is a tab stop. Radios can sit anywhere inside the group, including in wrapper elements. Standalone radios sharing a name in the same root still uncheck each other, but only the group provides arrow-key navigation and a single change event with the new value.
Installation
npm install @c2n/radio
Importing @c2n/radio registers both c2-radio-group and c2-radio.
Usage
Plan
MonthlyYearly
ShippingDelivery estimates are for business days.Standard3–5 days, free over $50Express1–2 days, $9Store pickupReady in 2 hours
EnabledChecked and disabledDisabledWhole group disabledOneTwo
FreeFor personal projectsProUnlimited projects, priority supportTeamShared workspaces and SSO
Set the group’s value to select an option from code, or set checked on a radio: the group adopts it and unchecks the rest. Listen for change on the group (detail.value); the options’ own change events are stopped at the group so a listener above it hears exactly one event per selection. Every option needs a value, and an option without a checked sibling leaves the group value empty.
The inner inputs live in shadow roots, so they do not take part in a surrounding <form>; read value from the group on submit or mirror it into a hidden input. The label slot names the group for assistive technology (aria-label works too); give a standalone radio without visible text an aria-label.
The indicator is not tied to the ring. --c2-radio__control--border-radius reshapes the ring and its dot (a square control at 4px); the dot slot replaces the filled dot with a mark such as a check, drawn in --c2-radio__dot--color; and the icon and checked-icon slots replace the whole control with an icon per state, coloured by --c2-radio__icon--color and --c2-radio__icon__checked--color and sized by --c2-radio__icon--size. With only icon, the same icon shows in both states and changes colour; with only checked-icon, the ring stays for the unchecked state. Hide that ring with --c2-radio__control--border: none and move the indicator after the text with --c2-radio__container--flex-direction: row-reverse to get a menu-style check list, as in the row above.
Theme the control with --c2-radio__control--* and --c2-radio__dot--* (an accent border with a transparent fill gives the outlined look), the text with --c2-radio__label--* and --c2-radio__description--*, and the whole row with --c2-radio__container--* for card-style options. Set those variables on the group and every option inherits them, as in the Cards row above; add --c2-radio-group--align-items: stretch so the cards fill the width.
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