CTA Button GeneratorCTA Generator

Platform Guide

How to Add a CTA Button to Gatsby

Add a floating call-to-action button to your Gatsby site via the layout component.

Gatsby uses React under the hood, so adding a floating CTA button follows the same patterns as React. The easiest approach is to add the code to your gatsby-ssr.js for site-wide injection, or include it in your shared layout component.

Why Add a CTA Button to Gatsby?

Gatsby sites are often used for marketing pages, blogs, and e-commerce storefronts that prioritize performance. Since Gatsby pre-renders every page at build time, a floating CTA button baked into the layout appears instantly in the initial HTML — no layout shift, no pop-in, and no waiting for JavaScript to hydrate. It's fast by design, just like Gatsby itself.

Step-by-Step Instructions

01

Design your CTA button

Open the CTA Button Generator and customize your button using the visual editor. Pick colors, position, animation, hover effects, icon, and font. The live preview updates in real time so you see exactly what your visitors will get.

02

Export your code

When you are happy with the design, click "Get Code" to export a clean HTML + CSS snippet. The code is lightweight, has zero dependencies, and works on any website.

03

Option A: Add to html.js

Copy the default html.js from Gatsby's cache (cp .cache/default-html.js src/html.js). Open it and paste your CTA button code before the closing </body> tag.

    {/* paste your CTA button code here */}
  </body>
</html>
04

Option B: Add to a layout component

If you have a shared layout component (e.g., src/components/Layout.js), add the CTA button code at the end of the component, after the main content.

export function Layout({ children }) {
  return (
    <>
      {children}
      {/* paste your CTA button JSX here */}
    </>
  );
}
05

Run and verify

Start your Gatsby dev server with gatsby develop. The floating CTA button should appear on all pages.

Best Practices for Gatsby

  • Use a shared Layout component rather than html.js if you want to manage the button alongside other React components.

  • Convert the exported HTML to JSX (className, camelCase styles) to avoid React warnings during development.

  • If using gatsby-ssr.js, use the onRenderBody API to inject the button in the body for a non-component approach.

  • Test with gatsby build && gatsby serve to verify the button renders correctly in the production build, not just development.

Ready to build your button?

Design it visually, export clean code, and paste it into your site.

Open the Generator

Frequently Asked Questions

Does it work with Gatsby's static site generation?

Yes. The CTA button is pure HTML + CSS, so Gatsby renders it at build time and includes it in the static output.

Will it interfere with Gatsby's hydration?

No. Since the button has no JavaScript, there's nothing to hydrate. It renders identically on server and client.

Can I use gatsby-ssr.js instead of modifying html.js?

Yes. In gatsby-ssr.js, export an onRenderBody function and use setPostBodyComponents to inject the CTA button as a React element at the end of the body.

Does the button appear during Gatsby's route transitions?

Yes. If placed in a Layout component that wraps all pages, the button persists across Gatsby's client-side route transitions without remounting.