How to integrate TryOnKit with Headless Shopify

Headless commerce represents the ultimate standard for modern, high-growth fashion brands. By decoupling the presentation layer from the e-commerce engine, engineers can craft blazing-fast storefronts using frameworks like React, Next.js, and Shopify Hydrogen. Integrating the TryOnKit SDK into a headless stack requires clean state synchronization, variant tracking, and robust client-side event orchestration.

Architectural Overview

In a typical Shopify headless environment, the product detail page (PDP) is dynamically generated during build time (SSR) or hydrated on-demand (ISR). Because the TryOnKit SDK performs intensive client-side activities like raw camera access, shopper image crops, and asynchronous API polling, it is essential to initialize the SDK safely inside the browser context without blocking server rendering.

Let's explore the data flow model for a seamless headless integration:

• Step 1: The customer lands on the PDP. Shopify Hydrogen fetches metadata via the Storefront API.
• Step 2: TryOnKit SDK is lazy-loaded asynchronously in React's client-side runtime.
• Step 3: The SDK binds to a placeholder element, checking for merchant credentials and the active variant's image URL.
• Step 4: Image upload or web-cam capture occurs. The browser sends client payloads securely via a sandboxed API proxy to protect merchant secrets.

Step-by-Step Implementation

To prevent hydration mismatches, wrap the SDK initialization in a React useEffect block. Here is a production-grade custom integration wrapper:

import { useEffect, useRef, useState } from "react";

interface TryOnWrapperProps {
  productId: string;
  variantImage: string;
  category: "upper_body" | "lower_body" | "full_body";
}

export function TryOnButton({ productId, variantImage, category }: TryOnWrapperProps) {
  const containerRef = useRef<HTMLDivElement>(null);
  const [isLoaded, setIsLoaded] = useState(false);

  useEffect(() => {
    // Only fetch and run window scripts client-side
    if (typeof window === "undefined") return;

    const script = document.createElement("script");
    script.src = "https://cdn.tryonkit.com/sdk.js";
    script.async = true;
    
    script.onload = () => {
      if (window.TryOnKit) {
        window.TryOnKit.init({
          apiKey: process.env.NEXT_PUBLIC_TRYON_KEY,
          productId: productId,
          productImage: variantImage,
          container: containerRef.current,
          config: {
            category: category,
            theme: "minimal-dark",
            onResultSuccess: (imageUrl: string) => {
              console.log("AI Try-On Generated successfully!", imageUrl);
            }
          }
        });
        setIsLoaded(true);
      }
    };

    document.head.appendChild(script);

    return () => {
      document.head.removeChild(script);
      if (window.TryOnKit && typeof window.TryOnKit.destroy === "function") {
        window.TryOnKit.destroy();
      }
    };
  }, [productId, variantImage, category]);

  return (
    <div className="w-full">
      <div ref={containerRef} id="vto-widget-container" />
      {!isLoaded && (
        <div className="h-12 w-full bg-neutral-100 animate-pulse rounded-full flex items-center justify-center text-sm font-medium text-neutral-400">
          Loading Try-On SDK...
        </div>
      )}
    </div>
  );
}

Handling Active Variant Updates

In modern fashion PDPs, shoppers toggle between various colorways and fabric patterns. Because each option corresponds to a completely different static image, your React component must tell the SDK when to refresh the donor image.

We advise passing variantImage as a reactive dependency in your parent state. TryOnKit's underlying algorithm listens to reference changes, immediately replacing the active product canvas without requiring the user to re-upload their photo.

"Performance optimization is paramount in headless commerce. By lazily loading the heavy canvas components only when a shopper actively selects try-on, you keep your core Core Web Vitals (LCP, INP, CLS) in the green."

Security: Domain Lock and Restricted API Scope

Because API calls consume generation credits, we enforce a strict Domain Authorization Policy inside your TryOnKit client panel. Even if an actor extracts your public API Key, requests originating from unauthorized domains are automatically blocked. This preserves your subscription security and maintains perfect telemetry logs on custom headless storefronts.