WordPress / Intermediate

Load assets only where needed

Conditionally enqueue heavy scripts so every page does not pay for one feature.

Why this matters

The production reason.

A script needed on one landing page should not slow down the entire site.

Conditionally enqueue assets by page template, block presence, shortcode, or route.

This keeps Core Web Vitals healthier and reduces conflicts between unrelated scripts.

Copy-ready example

add_action( 'wp_enqueue_scripts', function () {
  if ( is_page_template( 'templates/calculator.php' ) ) {
    wp_enqueue_script(
      'calculator',
      get_theme_file_uri( 'assets/calculator.js' ),
      [],
      '1.0',
      true
    );
  }
});

Platform notes.

How this applies outside a perfect demo, including frameworks, CMS platforms, stores, and builder workflows.

WordPress: Use is_page, is_singular, or has_block checks before enqueueing.

WooCommerce: Load checkout helpers only on checkout routes.

Elementor: Disable unused widget assets where possible.

Explore other stacks

Jump into a different technology.

Move from this WordPress note into related HTML, CSS, Next.js, JavaScript, React, WordPress, and performance lessons.

Next.js

Use generateStaticParams for dynamic routes

Pre-render dynamic pages at build time instead of on every request to cut TTFB.

React

Keep state close to the interaction

Local state avoids unnecessary parent renders and keeps component intent obvious.

JavaScript

Abort stale fetch requests

Cancel outdated browser requests so fast UI changes do not render old data.

CSS

Use clamp for fluid spacing

Fluid spacing keeps layouts responsive without a forest of breakpoint overrides.

Performance

Compress images before deploy

Oversized images are still the easiest way to lose LCP before users see anything.

HTML

Use real buttons for actions

If it changes state, use button. If it navigates, use a link.