# AssemblyScript
[AssemblyScript] has included support for targeting WASI since version 0.10.0. To use it, add
`import "wasi"` at the top of your entrypoint file.
Let's walk through a simple hello world example using the latest AssemblyScript runtime (at the time of this writing, it is AssemblyScript runtime included in version 0.19.x):
## `wasi-hello-world.ts`
```typescript
{{#include ./assemblyscript-hello-world/wasi-hello-world.ts}}
```
This uses [as-wasi] as a dependency to make working with the AssemblyScript WASI
bindings easier. Then, you can run:
```sh
asc wasi-hello-world.ts -b wasi-hello-world.wasm
```
to compile it to wasm, and
```sh
wasmtime wasi-hello-world.wasm
```
to run it from the command-line. Or you can instantiate it using the [Wasmtime API].
## `package.json`
It can also be packaged using a `package.json` file:
```json
{{#include ./assemblyscript-hello-world/package.json}}
```
You can also [browse this source code online][code] and clone the wasmtime
repository to run the example locally.
[code]: https://github.com/bytecodealliance/wasmtime/blob/main/docs/assemblyscript-hello-world
[AssemblyScript]: https://assemblyscript.org
[as-wasi]: https://github.com/jedisct1/as-wasi
[Wasmtime API]: ./lang.md
