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next.js/examples/with-webassembly/readme.md
2018-09-20 11:30:23 +02:00

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[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-webassembly)
# WebAssembly example
## How to use
### Using `create-next-app`
Execute [`create-next-app`](https://github.com/segmentio/create-next-app) with [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) or [npx](https://github.com/zkat/npx#readme) to bootstrap the example:
```bash
npx create-next-app --example with-webassembly with-webassembly-app
# or
yarn create next-app --example with-webassembly with-webassembly-app
```
### Download manually
Download the example:
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-webassembly
cd with-webassembly
```
Install it and run:
This example uses Rust compiled to wasm, the wasm file is included in the example, but to compile your own Rust code you'll have to [install](https://www.rust-lang.org/en-US/) Rust.
```bash
npm install
npm run dev
# or
yarn
yarn dev
```
To compile `src/add.rs` to `add.wasm` use `npm run build-rust`.
Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
```bash
now
```
## The idea behind the example
This example shows how to import WebAssembly files (`.wasm`) and use them inside of a React component that is server rendered. So the WebAssembly code is executed on the server too. In the case of this example we're showing Rust compiled to WebAssembly.