> ## Documentation Index > Fetch the complete documentation index at: https://aerojs.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Scripts > Understand Aero's four script types and when to use each one. Aero gives each `

``` Build scripts are **TypeScript by default**. You can use type annotations, interfaces, and `import type` without any extra configuration. The VS Code extension provides full IntelliSense and diagnostics. To opt out of TypeScript for a specific build script, add `type="js"`: ```html theme={"theme":"github-dark-default"} ``` Only one ` ``` * One ` ``` Use the `props` attribute to inject build-scope values into a client script: ```html theme={"theme":"github-dark-default"} ``` ## ` ``` ## ` ``` ## Scripts with `src` External URLs are left untouched. Local paths (using aliases or relative paths) go through Vite's asset pipeline and get bundled with hashed filenames: ```html theme={"theme":"github-dark-default"} ```