The fast-element library is a lightweight means to easily build performant, memory-efficient, standards-compliant Web Components. FAST Elements work in every major browser and can be used in combination with any front-end framework or even without a framework.
To install the fast-element library, use either npm or yarn as follows:
npm install --save @microsoft/fast-elementyarn add @microsoft/fast-elementWithin your JavaScript or TypeScript code, you can then import library APIs like this:
import { FASTElement } from '@microsoft/fast-element';:::tip Looking for a setup that integrates with a particular front-end framework or bundler? Check out our integration docs. :::
A pre-bundled script that contains all APIs needed to build web components with FAST Element is available on CDN. You can use this script by adding type="module" to the script element and then importing from the CDN.
<!DOCTYPE html>
<html lang="en">
<head>
<script type="module">
import { FASTElement } from "https://cdn.jsdelivr.net/npm/@microsoft/fast-element/dist/fast-element.min.js";
// your code here
</script>
</head>
<!-- ... -->
</html>The markup above always references the latest release. When deploying to production, you will want to ship with a specific version. Here's an example of the markup for that:
<script type="module" src="https://cdn.jsdelivr.net/npm/@microsoft/fast-element@1.6.2/dist/fast-element.min.js"></script>:::note For simplicity, examples throughout the documentation will assume the library has been installed from NPM, but you can always replace the import location with the CDN URL. :::
:::tip Looking for a quick guide on building components? Check out our Cheat Sheet. :::