Radio

Overview

Allows user to select a single option from a number of choices, only one radio button can be selected at a time.

Anatomy

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1. Title (Optional)
2. Radio input
3. Radio label

States

• By default, depending on specific context, designer has to decide whether the radio button has a pre-selected value or not.
  • Pre-selected value when:
    • There's 1 option preferred to set default
    • Or the option is based on most common or expected response.
  • No pre-selected value when:
    • It’s crucial for users to consciously make a choice deliberately
    • Or there's no option preferred
• Error when:
  • A set of selections needs to be chosen in order to move forward
  • Or that a selection that was made is invalid.
• Disabled when:
  • Indicating that an option is not currently available, though may be available later
  • Another action has to be completed before the checkbox is usable

Variants

Alignment

Content

Title

• In most cases, the title provides further context or describes what actions to take below.
• In some cases, a group of radio buttons may be within a larger group of components that already have a group title. In this case, the title is not needed.

Radio labels

• Should use clear and concise labels for radio buttons.
• In most cases, labels appear to the right of radio inputs.
• When using a line break, the radio is horizontally aligned with the first line of the label

Usage Guidelines

When to use

• To present a few options where only one can be selected.
• Can be used in forms on a full page, in modals, or on side panels (to filter data either on a page, or in a menu), or within a component

When not to use

• If user can select multiple options from a list - use checkbox

• If user has to input an option from a long list of items - use dropdown input

• If there is only single on/off settings with an instant response - use a switch.

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References

Doctolib - Radio Carbon design system - Radio button Material - Radio button