Add conditional navigation

version: 1
title: "Example form"
description: "A simple form with conditional navigation."

sections:
  - id: section_1
    title: "Section 1"
    fields:
      - id: question_1
        type: dropdown
        label: "Question 1"
        options:
          - label: "Go to section 2"
            value: "section_2"
          - label: "Go to section 3"
            value: "section_3"
          - label: "Go to external website"
            value: "external"
        validators:
          - required

    next:
      # If question_1 is section_2, move to section_2.
      - when: "data.question_1 === 'section_2'"
        go: "section_2"

      # If question_1 is section_3, move to section_3.
      - when: "data.question_1 === 'section_3'"
        go: "section_3"

      # If question_1 is external, send the user to an external website.
      - when: "data.question_1 === 'external'"
        go: "https://example.com"

      # If nothing matches, complete the form.
      - else: "done"

  - id: section_2
    title: "Section 2"
    fields:
      - id: question_2
        type: short_text
        label: "Question 2"
        validators:
          - required

    # After this section is submitted, the form is complete.
    next: done

  - id: section_3
    title: "Section 3"
    fields:
      - id: question_3
        type: short_text
        label: "Question 3"
        validators:
          - required

    # After this section is submitted, the form is complete.
    next: done