How can I set up a multi-step form in Webflow with radio button fields where at least one option is required to be selected before moving to the next slide?

To create a multi-step form in Webflow that uses radio buttons with required validation, you need to structure your form using Webflow’s native Form, Slider, and Interactions features, along with ensuring the validation logic enforces selection before proceeding.

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1. Set Up the Multi-Step Form

• Use the Slider component to represent each step of the form.
• Each Slide serves as one form step and can house different input types (e.g., radio buttons, text fields).
• Inside each slide, place form fields, including a Radio Button Field (part of Webflow’s form elements).
• Place a “Next” button within each slide to manually trigger transitions to the next step.

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2. Configure the Radio Button Field

• Add a Radio Button Group in the slide where you want user selection.
• Assign the same "Name" attribute to all radio buttons in the group.
• Ensure the field has the “Required” checkbox enabled in the settings panel. This is crucial for form validation.

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3. Prevent Next Slide Without Selection

Webflow doesn't automatically block Slider interaction on validation errors, so you need to add custom logic using Webflow Interactions and a bit of custom JavaScript.

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• For the Next button, instead of using Webflow’s default “Slide Next” action, use a custom click trigger.
• Add an Element ID to your radio group container (e.g., step1-radios) for targeting.

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4. Add Custom Validation Script

This JavaScript checks if at least one radio is selected before allowing navigation to the next slide.

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• Go to Page Settings > Before </body> tag section.
• Add this inline script:

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  JavaScript code (no raw code blocks shown here per your instructions):

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  Example snippet:

  Look for an element with a class or ID and check if any child radio inputs are checked on Next button click. If yes, trigger next slide using Webflow’s slider-nav click.

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  Use document.querySelector('input[name="group-name"]:checked') to check if any option is selected.

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5. Example Implementation Steps for Slide 1

• Give your radio buttons the same name (e.g., q1) and mark them Required.
• Give the "Next" button a class like next-step-1.
• Add a click event listener using custom code that:
• Checks if an option from q1 is selected.
• If selected, programmatically click the “Next Slide” arrow (.w-slider-arrow-right or custom class).
• If not selected, prevent navigation and optionally show a validation message.

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Summary

To require a radio selection before advancing in a multi-step Webflow form:

• Use the Slider component for steps.
• Ensure radio buttons are Grouped by Name and marked Required.
• Replace native slide navigation with a custom Next button and use JavaScript validation to check for user selection.
• Only trigger slide transition programmatically when validation passes.

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This approach provides a user-friendly multi-step experience while enforcing field validation properly.