Video Tutorial: Add custom HTML, CSS, and Javascript to Figma banner exports

If you need to add your own custom HTML/CSS/Javascript to all of your HTML banner exports, you can enable the Inject Custom Code toggle in the export settings, which will allow you to add custom HTML before the closing </body> (for adding content) or </head> (for adding meta tags or asset links) tags, or adding custom CSS to a new style tag, or adding custom Javascript code inside new a <script></script> tag.