Javascript

Build Interactive Charts in Hugo without JavaScript

Can you build interactive charts in Hugo without any JavaScript? Yes - by using Hugo shortcodes that transform CSV or JSON data into styled SVG graphics at build time. This “Zero-JS” approach produces charts that render instantly, work in every browser environment including RSS readers and print, and score significantly better on the page-speed metrics Google ranks on than anything built with Chart.js or D3.js .

The Problem with Client-Side Charting Libraries

Chart.js is excellent software. So is D3.js. But both carry a tax that static blog authors rarely think about until they run their first Lighthouse audit.

Core Web Vitals: Fix LCP, CLS, and INP

To pass all three Core Web Vitals, target three numbers. Get LCP under 2.5 seconds by preloading your hero image and cutting server response time. Get CLS under 0.1 by reserving explicit dimensions for all media. Get INP under 200ms by breaking long JavaScript tasks into smaller chunks. Diagnose all three with Chrome DevTools, Lighthouse, and the CrUX Dashboard for real-user field data.

Why Core Web Vitals Matter for SEO and User Experience

Google added Core Web Vitals to its ranking algorithm in 2021, and their weight has grown since. The March 2026 core update brought holistic CWV scoring. Google now aggregates performance data across your whole domain rather than judging it page by page. If 30% of your indexed pages fail LCP thresholds, that drags down the site-wide score even when your homepage is fast.

Web Components: Build Framework-Agnostic UI Elements

Web Components are native browser APIs: Custom Elements, Shadow DOM, and HTML Templates. They let you build reusable UI parts like <modal-dialog> or <accordion-panel> that work in React, Vue, Svelte, Angular, or plain HTML. No build tools, no framework lock-in. With 98% browser support in 2026, they’re the most portable component format around. Write it once, ship it anywhere.

The Three APIs That Make Up Web Components

Web Components is an umbrella term for three browser APIs that work together. You can use each one on its own. Custom Elements without Shadow DOM, Shadow DOM without Templates. But the combination is where they shine.