Opinion is a bug.
Data is the fix.

// app/page.tsx
import { getVariant } from 'split-sdk/server';
 
 
export default async function Page() {
  const variant = await getVariant(
    'hero_headline', { userId }
  )
  return <Hero variant={variant} />
}

// theme.liquid
{% assign variant = split.get_variant
  experiment: 'product_page_layout'
  user_id: customer.id
%}
 
{% if variant == 'grid' %}
  {% render 'product-grid' %}
{% else %}
  {% render 'product-list' %}
{% endif %}

# app/controllers/home_controller.rb
class HomeController < ApplicationController
  def index
    @variant = Split.get_variant(
      'pricing_table_order',
      current_user.id
    )
  end
end

// lib/main.dart
final variant = await SplitClient
  .instance
  .getVariant(
    experimentKey: 'onboarding_flow',
    userId: user.id,
  );
 
if (variant == 'guided') {
  Navigator.push(context,
    GuidedOnboarding.route());
}

// components/PricingCTA.tsx
import { useExperiment } from 'split-sdk/react';
 
 
export function PricingCTA() {
  const { variant } = useExperiment(
    'cta_button_text'
  )
 
  return (
    <Button>
      {variant === 'a'
        ? 'Start free trial'
        : 'Get started free'}
    </Button>
  )
}

# views.py
from split_sdk import SplitClient
 
client = SplitClient(api_key=API_KEY)
 
def checkout_view(request):
    variant = client.get_variant(
        'checkout_flow',
        user_id=request.user.id
    )
    template = f'checkout_{variant}.html'
    return render(request, template)