This was an amazing find, and saved us a ton of engineering effort to try to figure out how to configure and manage a CDN on our own. A custom Preact Hook that provides a sensible alternative to useRef for storing instance. While exploring CDN options, we discovered unpkg and realized that we just get that functionality for free. A free, fast, and reliable CDN for preact-hooks/instance. It would be better if non npm users could just drop a link tag into the head of their HTML page that would grab the design system CSS off of a CDN. Using it, you can create a new application by running the create command: npx preact-cli create default my-project This will create a new application based on our default template. Forcing consumers to introduce another package management tool just to get a few files seems heavy. As the name implies, Preact CLI is a c ommand- l ine i nterface that can be run in the terminal on your machine. We cannot guarantee that all consumers of the design system work in the npm ecosystem, though: our Data Science teams need to leverage design system CSS to build uptake branded reports and components, but they work primarily with python and the pip ecosystem. We distribute the design system via npm as a node_module. The design system is built as a set of CSS classes and html templates (ala bootstrap), and give your site an uptake look-and-feel. I work on a team that supports Uptake’s design system. This also lets you explore which other versions of the package are currently published.įinally, while unpkg’s documentation notes that assets are browser-cached for 4 hours, I found that assets were actually cached for 1 year (via cache-control headers).Below is a minimal component that uses useState, with all types infered from the function signature's default values. useState, useEffect and useContext all feature generic types so you don't need to annotate extra. Just navigating to // <– note the slash at the end of the URL. Most hooks don't need any special typing information, but can infer types from usage. The signal can be updated without re-rendering any components, since components see the signal and not its value. You can specify a semantic version in your unpkg url, including semantic version ranges and qualifiers like ^ and ~ which will source the maximum satisfying sources the latest minor version of react 16 (16.5.2 as of this sources the latest patch version of react 16.4 (which is 16.4.2) In Preact, when a signal is passed down through a tree as props or context, were only passing around references to the signal. This is a pretty amazing service to offer for free. Unpkg partners with cloudfare and heroku to make this automatic distributing possible. What is Preact, Use preactnext if in beta, or just preact if youre, Our first component Next, we need to write something for Preact to render., Rendering our. Unpkg is a free content delivery network (CDN) that automatically distributes public packages published to npm. Preact CLI does not require any configuration or prior knowledge to get started, and this simplicity makes it the most popular way to use Preact.Īs the name implies, Preact CLI is a command- line interface that can be run in the terminal on your machine.Unpkg: the free CDN for your npm packages ![]() ![]() It's built on standard tooling projects like Webpack, Babel and PostCSS. ![]() Preact CLI is an off-the-shelf solution for building Preact applications that is optimized for modern web development. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself. Tip: HTM also provides a convenient single-import Preact version:įor more information on HTM, check out its documentation. You can apply CSS to your Pen from any stylesheet on the web.
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