Image Optimization

Image optimization is the process of reducing the number of bytes that represent an image. The smaller the image size, the faster it will load on a page. The smaller the image size, the less bandwidth it consumes. The less bandwidth it consumes, the better the experience for your users especially on mobile networks.

qwik-image

Performant images with automatic optimisation.

This is a pluggable component so devs could connect different image loaders to it (like builder.io or other CDNs)

Here is the Github repository with detailed instructions on usage and customizations: qwikifiers/qwik-image

Example

import { $, component$ } from '@builder.io/qwik';
import { Image, ImageTransformerProps, useImageProvider } from 'qwik-image';
 
export default component$(() => {
	const imageTransformer$ = $(
		({ src, width, height }: ImageTransformerProps): string => {
      // Here you can set your favourite image loaders service
			return `https://cdn.builder.io/api/v1/${src}?height=${height}&width=${width}}&format=webp&fit=fill`;
		}
	);
 
  // Global Provider (required)
	useImageProvider({
    // You can set this prop to overwrite default values [3840, 1920, 1280, 960, 640]
    resolutions: [640], 
		imageTransformer$,
	});
 
	return (
		<Image
			layout='constrained'
			objectFit='fill'
			width={400}
			height={500}
			alt='Tropical paradise'
			placeholder='#e6e6e6'
			src={
				'image/assets%2FYJIGb4i01jvw0SRdL5Bt%2Fe5113e1c02db40e5bac75146fa46386f'
			}
		/>
	);
});

@unpic/qwik

• Site with detailed instructions on usage: @unpic/qwik
• Installation: npm install @unpic/qwik

Unpic is a third-party image optimization library that works with existing image optimization CDNs. It provides an Image component that can be used to optimize images.

import { component$ } from '@builder.io/qwik';
import { Image } from '@unpic/qwik';
 
export default component$(() => {
  return (
    <Image
      src="https://cdn.shopify.com/static/sample-images/bath_grande_crop_center.jpeg"
      layout="constrained"
      width={800}
      height={600}
      alt="A lovely bath"
    />
  );
});

Note: qwik-image and unpic are not a CDN and does not host your images. They work with existing image optimization CDNs. We suggest using some of the popular CDNs:

• Cloudinary
• Cloudflare
• Bunny.net
• Vercel / Next.js
• Imgix, including Unsplash, DatoCMS, Sanity and Prismic
• Shopify
• Kontent.ai
• Builder.io
• Contentful
• Storyblok
• WordPress.com and Jetpack Site Accelerator