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Fix the wasm2js example (#1750)

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This needed and update now that we're explicitly importing `*.wasm` to
import `*.js` instead. Additionally this was moved over to the `web`
target to avoid needing Webpack

Closes #1743
This commit is contained in:
Alex Crichton 2019-09-03 16:05:23 -04:00 committed by GitHub
parent 1f39a3045f
commit 4e19ead71b
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 11 additions and 47 deletions
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2
examples/wasm2js/README.md
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@ -14,4 +14,4 @@ $ ./build.sh
(or running the commands on Windows manually) (or running the commands on Windows manually)
and then visiting http://localhost:8080 in a browser should run the example! and then visiting http://localhost:8000 in a browser should run the example!

9
examples/wasm2js/build.sh
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@ -3,13 +3,12 @@
set -ex set -ex
# Compile our wasm module and run `wasm-bindgen` # Compile our wasm module and run `wasm-bindgen`
wasm-pack build wasm-pack build --target web
# Run the `wasm2js` tool from `binaryen` # Run the `wasm2js` tool from `binaryen`
wasm2js pkg/wasm2js_bg.wasm -o pkg/wasm2js_bg.js wasm2js pkg/wasm2js_bg.wasm -o pkg/wasm2js_bg.js
# Move our original wasm out of the way to avoid cofusing Webpack. # Update our JS shim to require the JS file instead
mv pkg/wasm2js_bg.wasm pkg/wasm2js_bg.bak.wasm sed -i 's/wasm2js_bg.wasm/wasm2js_bg.js/' pkg/wasm2js.js
npm install http
npm run serve

1
examples/wasm2js/index.html
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@ -5,4 +5,5 @@
<body> <body>
<p>Open up the developer console to see "Hello, World!"</p> <p>Open up the developer console to see "Hello, World!"</p>
</body> </body>
<script src=index.js type=module></script>
</html> </html>

8
examples/wasm2js/index.js
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@ -1,4 +1,4 @@
// Note that since we're not using `WebAssembly` we can do a synchronous import // Import our JS shim and initialize it, executing the start function when it's
// here! // ready.
import { run } from './pkg/wasm2js'; import init from './pkg/wasm2js.js';
run(); init();

13
examples/wasm2js/package.json
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@ -1,13 +0,0 @@
{
"scripts": {
"build": "webpack",
"serve": "webpack-dev-server"
},
"devDependencies": {
"text-encoding": "^0.7.0",
"html-webpack-plugin": "^3.2.0",
"webpack": "^4.29.4",
"webpack-cli": "^3.1.1",
"webpack-dev-server": "^3.1.0"
}
}

2
examples/wasm2js/src/lib.rs
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@ -7,7 +7,7 @@ extern "C" {
fn log(s: &str); fn log(s: &str);
} }
#[wasm_bindgen] #[wasm_bindgen(start)]
pub fn run() { pub fn run() {
log("Hello, World!"); log("Hello, World!");
} }

23
examples/wasm2js/webpack.config.js
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@ -1,23 +0,0 @@
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');
module.exports = {
entry: './index.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'index.js',
},
plugins: [
new HtmlWebpackPlugin({
template: "index.html"
}),
// Have this example work in Edge which doesn't ship `TextEncoder` or
// `TextDecoder` at this time.
new webpack.ProvidePlugin({
TextDecoder: ['text-encoding', 'TextDecoder'],
TextEncoder: ['text-encoding', 'TextEncoder']
})
],
mode: 'development'
};