Component Extraction and Partials
Break large HTML files into reusable partial templates.
The Duplication Problem
As an HTML codebase grows, the same chunks of markup appear in many pages — site header, footer, navigation, product card, form field. Copy-pasting them creates a maintenance nightmare; changing the footer means editing every page.
Server-Side Includes
Most server-side templating languages (Jinja, Liquid, ERB, EJS, Handlebars, Twig) support include directives: {% include "header.html" %} or <%- include("header") %>. The build or server inlines the partial into every page that includes it.
<!-- page.html -->
{% include "partials/header.html" %}
<main>{{ content }}</main>
{% include "partials/footer.html" %}All lessons in this course
- Component Extraction and Partials
- Server-Side Templating Jinja2 Handlebars
- HTML in Design Systems
- Documentation and Styleguide Integration