{"id":45099,"date":"2023-03-22T15:04:16","date_gmt":"2023-01-02T18:35:20","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/"},"modified":"2024-04-29T20:03:37","modified_gmt":"2024-04-29T12:03:37","slug":"45099-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/","title":{"rendered":""},"content":{"rendered":"<h1>Rust \u306b\u304a\u3051\u308b wasm-bindgen \u3068 wasm-pack \u3068 cargo-web \u3068 stdweb \u306e\u9055\u3044<\/h1>\n<p>\u203b\u3053\u308c\u306f WebAssembly Advent Calendar 2018 \u306e 12 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059<br \/>\n\u203b\u3053\u3053\u3067\u306e\u4f5c\u696d\u306f\u3059\u3079\u3066 nightly \u3092\u524d\u63d0\u3068\u3057\u3066\u3044\u307e\u3059<\/p>\n<h2>\u7cfb\u7d71\u306e\u9055\u3044<\/h2>\n<p>Rust \u304b\u3089 wasm \u3078\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u306b\u306f emscripten \u3092\u4f7f\u3046\u65b9\u6cd5\u3068\u3001 wasm-bindgen \u3092\u4f7f\u3046\u65b9\u6cd5\u306e\uff12\u3064\u3042\u308a\u307e\u3059<\/p>\n<h3>emscripten \u7cfb\u7d71<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3082\u3068\u3082\u3068\u306f clang \u306e\u5410\u3044\u305f LLVMIR \u304b\u3089\u540c\u7b49\u306e JavaScript \u3092\u51fa\u529b\u3067\u304d\u308b\u30c4\u30fc\u30eb<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f8c\u306b asm.js , wasm \u3082\u51fa\u529b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">libc \u76f8\u5f53\u306e system call \u304c JavaScript \u306e\u4e16\u754c\u3067\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3067\u304d\u308b(ex. FileSystem<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u65e2\u5b58\u306e C\/C++ \u3067\u66f8\u304b\u308c\u305f\u30b3\u30fc\u30c9\u3092\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u304f\u3088\u3046\u306b\u5909\u63db\u3059\u308b\u306e\u304c\u76ee\u7684<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">C\/C++\/Rust \u304b\u3089 JavaScript \u3092\u547c\u3073\u51fa\u3059\u306e\u304c\u4e3b\u306a\u4f7f\u3044\u65b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4eca\u65e5\u306f\u3053\u306e\u8a71\u306f\u3057\u306a\u3044<\/ul>\n<h4>\u4e3b\u306a\u767b\u5834\u4eba\u7269<\/h4>\n<p>\u4e0b\u306b\u884c\u304f\u307b\u3069\u65b0\u3057\u3044\u30c4\u30fc\u30eb\u3067\u3059<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">emscripten &#8211; C\/C++ \u3092 LLVMIR \u3092\u7d4c\u7531\u3057\u3066 asmjs \u3084\u3089 wasm \u3084\u3089\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb &#8211; https:\/\/kripken.github.io\/emscripten-site\/docs\/introducing_emscripten\/about_emscripten.html<\/ul>\n<\/li>\n<\/ul>\n<p>Binaryen &#8211; \u7279\u306b C\/C++ \u3092 emscripten \u3092\u4f7f\u3063\u3066 wasm \u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb &#8211; https:\/\/github.com\/WebAssembly\/binaryen<\/p>\n<p>emscripten-sys &#8211; Rust \u304b\u3089 emscripten \u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3078\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u304c\u5165\u3063\u305f\u30af\u30ec\u30fc\u30c8 &#8211; https:\/\/crates.io\/crates\/emscripten-sys<\/p>\n<p>stdweb &#8211; Rust \u304b\u3089 DOM \u3092\u6271\u3046\u305f\u3081\u306e\u306e\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u306e\u5165\u3063\u305f\u30af\u30ec\u30fc\u30c8 &#8211; https:\/\/crates.io\/crates\/stdweb<\/p>\n<p>cargo-web &#8211; stdweb \u3092\u4f7f\u3063\u305f Rust \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb &#8211; https:\/\/crates.io\/crates\/cargo-web<\/p>\n<h3>wasm-bindgen \u7cfb\u7d71<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/rustwasm.github.io<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Mozilla \u809d\u3044\u308a\u306e Rust \u3092 Web \u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u304b\u3059\u305f\u3081\u306e\u30c4\u30fc\u30eb<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">emscripten \u7cfb\u5217\u3088\u308a\u3082\u65b0\u3057\u3044\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">JavaScript \u304b\u3089 Rust \u3092\u547c\u3073\u51fa\u3059\u306e\u304c\u4e3b\u306a\u4f7f\u3044\u65b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4eca\u65e5\u8a71\u3059\u306e\u306f\u3053\u308c<\/ul>\n<h4>\u4e3b\u306a\u767b\u5834\u4eba\u7269<\/h4>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">wasm-bindgen &#8211; \u57fa\u672c\u7684\u306a\u578b\u306e\u306a\u3069\u304c\u5165\u3063\u305f\u30af\u30ec\u30fc\u30c8 &#8211;<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">js-sys &#8211; Rust \u304b\u3089 JavaScript \u306e\u5024\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306e\u30af\u30ec\u30fc\u30c8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">web-sys &#8211; Rust \u304b\u3089 DOM \u3068\u304b\u3092\u53e9\u304f\u305f\u3081\u306e\u30af\u30ec\u30fc\u30c8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">wasm-bindgen-futures &#8211; Rust \u306e Future \u3068 JavaScript \u306e Promise \u306e\u578b\u3092\u76f8\u4e92\u5909\u63db\u3059\u308b\u305f\u3081\u306e\u30af\u30ec\u30fc\u30c8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">wasm-bindgen-cli &#8211; wasm-bindgen \u3084 js-sys \u3084 web-sys \u30af\u30ec\u30fc\u30c8\u3092\u4f7f\u3063\u3066\u751f\u6210\u3057\u305f wasm \u30d5\u30a1\u30a4\u30eb\u306b Rust \u3068 JS \u306e FFI \u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u8ffd\u52a0\u3059\u308b\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">wasm-pack &#8211; wasm-bindgen \u3092\u4f7f\u3063\u305f Rust \u30b3\u30fc\u30c9\u3092 npm \u306e package.json \u304b\u3089\u547c\u3076\u305f\u3081\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u51fa\u529b\u3059\u308b\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb<\/ul>\n<h2>\u304a\u304a\u307e\u304b\u306a\u6b74\u53f2<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2000\u5e74\u4ee3\u521d\u982d: Java \u30a2\u30d7\u30ec\u30c3\u30c8\u3001Slackwave Flash \u5168\u76db\u671f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2005\u5e74: GoogleMap \u3001 Ajax \u306e\u767b\u5834<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2007\u5e74: MS \u304c Silverlight \u3092\u767a\u8868<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2010\u5e74: emscripten \u304c\u767b\u5834\u3057 C\/C++ \u30b3\u30fc\u30c9\u3092 JavaScript \u306b\u5909\u63db\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2011\u5e74: Google \u304c NaCl , PNaCl \u3092\u767a\u8868<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2013\u5e74: Mozilla \u304c asm.js \u3092\u767a\u8868<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2015\u5e74: Mozilla \u3084 Google \u304c asm.js \u3092\u3088\u308a\u4e00\u822c\u5316\u3057\u305f wasm \u3092\u767a\u8868<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">2017\u5e74: stdweb<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">2018\u5e74: wasm-bindgen<\/ul>\n<h2>wasm-bindgen-cli \u3068 wasm-pack \u306e\u9055\u3044<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">wasm-bindgen-cli \u306f wasm \u3068 JavaScript \u306e\u30e9\u30c3\u30d1\u30fc\u3068 TypeScript \u306e\u578b\u5b9a\u7fa9\u3092\u51fa\u529b\u3057\u3066\u304f\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">wasm-pack \u306f\u5185\u90e8\u3067 wasm-bindgen-cli \u3092\u4f7f\u3044\u3001\u2191\u306b\u52a0\u3048\u3066 npm \u306b\u516c\u958b\u3059\u308b\u305f\u3081\u306e package.json \u3082\u51fa\u529b\u3059\u308b<\/ul>\n<h3>wasm-bindgen-cli \u306e\u751f\u6210\u7269<\/h3>\n<ul class=\"post-ul\">https:\/\/rustwasm.github.io\/wasm-bindgen\/whirlwind-tour\/basic-usage.html<\/ul>\n<p>\u3053\u308c\u3092<\/p>\n<pre class=\"post-pre\"><code><span class=\"nn\">[package]<\/span>\r\n<span class=\"py\">name<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"iso-rust3\"<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1.0\"<\/span>\r\n<span class=\"py\">authors<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span><span class=\"s\">\"Legokichi Duckscallion &lt;legokichi@gmail.com&gt;\"<\/span><span class=\"p\">]<\/span>\r\n<span class=\"py\">edition<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"2018\"<\/span>\r\n\r\n<span class=\"nn\">[lib]<\/span>\r\n<span class=\"py\">crate-type<\/span> <span class=\"p\">=<\/span> <span class=\"nn\">[\"cdylib\"]<\/span>\r\n\r\n<span class=\"nn\">[dependencies]<\/span>\r\n<span class=\"py\">futures<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1\"<\/span>\r\n<span class=\"py\">serde<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"py\">serde_json<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"py\">serde_derive<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"nn\">wasm-bindgen<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.2\"<\/span><span class=\"p\">,<\/span> <span class=\"py\">features<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span> <span class=\"s\">\"serde-serialize\"<\/span> <span class=\"p\">]<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"py\">wasm-bindgen-futures<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<span class=\"py\">js-sys<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n\r\n<span class=\"nn\">[dependencies.web-sys]<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">wasm_bindgen<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">wasm_bindgen<\/span><span class=\"p\">::<\/span><span class=\"nn\">prelude<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[wasm_bindgen]<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">alert<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">#[wasm_bindgen]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">greet<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">alert<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello, World!\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3046\u3057\u3066<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> rustup target add wasm32-unknown-unknown\r\n<span class=\"gp\">$<\/span> cargo <span class=\"nb\">install <\/span>wasm-bindgen-cli\r\n<span class=\"gp\">$<\/span> cargo build <span class=\"nt\">--target<\/span> wasm32-unknown-unknown\r\n<span class=\"gp\">$<\/span> wasm-bindgen target\/wasm32-unknown-unknown\/debug\/iso_rust3.wasm <span class=\"nt\">--out-dir<\/span> .\/wasm\r\n<span class=\"gp\">$<\/span> tree .\/wasm\r\n<span class=\"go\">wasm\r\n\u251c\u2500\u2500 iso_rust3_bg.d.ts\r\n\u251c\u2500\u2500 iso_rust3_bg.wasm\r\n\u251c\u2500\u2500 iso_rust3.d.ts\r\n\u2514\u2500\u2500 iso_rust3.js\r\n<\/span><\/code><\/pre>\n<p>\u3053\u3046\u306a\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"cm\">\/* tslint:disable *\/<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"o\">*<\/span> <span class=\"k\">as<\/span> <span class=\"nx\">wasm<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/iso_rust3_bg<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">lTextDecoder<\/span> <span class=\"o\">=<\/span> <span class=\"k\">typeof<\/span> <span class=\"nx\">TextDecoder<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">undefined<\/span><span class=\"dl\">'<\/span> <span class=\"p\">?<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">util<\/span><span class=\"dl\">'<\/span><span class=\"p\">).<\/span><span class=\"nx\">TextDecoder<\/span> <span class=\"p\">:<\/span> <span class=\"nx\">TextDecoder<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">cachedTextDecoder<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">lTextDecoder<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">utf-8<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">cachegetUint8Memory<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"p\">;<\/span>\r\n<span class=\"kd\">function<\/span> <span class=\"nx\">getUint8Memory<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">cachegetUint8Memory<\/span> <span class=\"o\">===<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"nx\">cachegetUint8Memory<\/span><span class=\"p\">.<\/span><span class=\"nx\">buffer<\/span> <span class=\"o\">!==<\/span> <span class=\"nx\">wasm<\/span><span class=\"p\">.<\/span><span class=\"nx\">memory<\/span><span class=\"p\">.<\/span><span class=\"nx\">buffer<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nx\">cachegetUint8Memory<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nb\">Uint8Array<\/span><span class=\"p\">(<\/span><span class=\"nx\">wasm<\/span><span class=\"p\">.<\/span><span class=\"nx\">memory<\/span><span class=\"p\">.<\/span><span class=\"nx\">buffer<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">cachegetUint8Memory<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nx\">getStringFromWasm<\/span><span class=\"p\">(<\/span><span class=\"nx\">ptr<\/span><span class=\"p\">,<\/span> <span class=\"nx\">len<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">cachedTextDecoder<\/span><span class=\"p\">.<\/span><span class=\"nx\">decode<\/span><span class=\"p\">(<\/span><span class=\"nx\">getUint8Memory<\/span><span class=\"p\">().<\/span><span class=\"nx\">subarray<\/span><span class=\"p\">(<\/span><span class=\"nx\">ptr<\/span><span class=\"p\">,<\/span> <span class=\"nx\">ptr<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">len<\/span><span class=\"p\">));<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">function<\/span> <span class=\"nx\">__wbg_alert_d4ac2591f07b50f4<\/span><span class=\"p\">(<\/span><span class=\"nx\">arg0<\/span><span class=\"p\">,<\/span> <span class=\"nx\">arg1<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">let<\/span> <span class=\"nx\">varg0<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">getStringFromWasm<\/span><span class=\"p\">(<\/span><span class=\"nx\">arg0<\/span><span class=\"p\">,<\/span> <span class=\"nx\">arg1<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nx\">alert<\/span><span class=\"p\">(<\/span><span class=\"nx\">varg0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"cm\">\/**\r\n* @returns {void}\r\n*\/<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">function<\/span> <span class=\"nx\">greet<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">wasm<\/span><span class=\"p\">.<\/span><span class=\"nx\">greet<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u2191\u306f js-sys \u3084 web-sys \u3092\u4ecb\u3057\u3066\u4f7f\u3063\u305f JavaScript \u5074\u306e API \u3092\u547c\u3076\u305f\u3081\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u30b3\u30fc\u30c9\u304c\u3044\u308d\u3044\u308d\u8ffd\u52a0\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u30e9\u30f3\u30bf\u30a4\u30e0\u306f JavaScript \u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092 wasm \u306e\u4e16\u754c\u306e\u30e1\u30e2\u30ea\u306e\u30d2\u30fc\u30d7\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u3057\u3066\u3001 Rust \u304c\u8aad\u3081\u308b\u5f62\u3067\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\u3001\u305d\u306e\u30dd\u30a4\u30f3\u30bf\u3092 Rust \u306e\u95a2\u6570\u306b\u6e21\u3057\u3066\u3044\u308b\u3002<br \/>\n\u3088\u308a\u8907\u96d1\u306a\u3053\u3068\u3092\u3059\u308b\u3068\u3088\u308a\u591a\u304f\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u30b3\u30fc\u30c9\u304c\u51fa\u529b\u3055\u308c\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cm\">\/* tslint:disable *\/<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">function<\/span> <span class=\"nx\">greet<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"cm\">\/* tslint:disable *\/<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">memory<\/span><span class=\"p\">:<\/span> <span class=\"nx\">WebAssembly<\/span><span class=\"p\">.<\/span><span class=\"nx\">Memory<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">function<\/span> <span class=\"nx\">greet<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3089\u306e\u751f\u6210\u7269\u306f JavaScript \u304b\u3089 ESModule \u3092\u4f7f\u3063\u3066\u3053\u306e\u3088\u3046\u306b\u547c\u3076\u3053\u3068\u304c\u3067\u3044\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">.\/wasm<\/span><span class=\"dl\">\"<\/span><span class=\"p\">).<\/span><span class=\"nx\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">iso_rust3<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">iso_rust3<\/span><span class=\"p\">.<\/span><span class=\"nx\">greet<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">World!<\/span><span class=\"dl\">\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<h3>wasm-pack \u306e\u751f\u6210\u7269<\/h3>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> rustup target add wasm32-unknown-unknown\r\n<span class=\"gp\">$<\/span> curl https:\/\/rustwasm.github.io\/wasm-pack\/installer\/init.sh <span class=\"nt\">-sSf<\/span> | sh\r\n<span class=\"gp\">$<\/span> wasm-pack build <span class=\"nt\">--dev<\/span>\r\n<span class=\"gp\">$<\/span> wasm-pack pack\r\n<span class=\"gp\">$<\/span> pkg\r\n<span class=\"go\">\u251c\u2500\u2500 iso-rust3-0.1.0.tgz\r\n\u251c\u2500\u2500 iso_rust3_bg.d.ts\r\n\u251c\u2500\u2500 iso_rust3_bg.wasm\r\n\u251c\u2500\u2500 iso_rust3.d.ts\r\n\u251c\u2500\u2500 iso_rust3.js\r\n\u2514\u2500\u2500 package.json\r\n<\/span><\/code><\/pre>\n<p>package.json \u4ee5\u5916\u306f\u540c\u3058<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"nl\">\"name\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"iso-rust3\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nl\">\"collaborators\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s2\">\"Legokichi Duckscallion &lt;legokichi@gmail.com&gt;\"<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"nl\">\"version\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"0.1.0\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nl\">\"files\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s2\">\"iso_rust3_bg.wasm\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s2\">\"iso_rust3.js\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s2\">\"iso_rust3.d.ts\"<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"nl\">\"module\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"iso_rust3.js\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nl\">\"types\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"iso_rust3.d.ts\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nl\">\"sideEffects\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"false\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>wasm-pack pack \u306f iso-rust3-0.1.0.tgz \u3092\u751f\u6210\u3059\u308b\u3002 npm pack \u76f8\u5f53\u3002<\/p>\n<h2>\u304a\u307e\u3051: js-sys \u3068 web-sys<\/h2>\n<p>js-sys \u3068 web-sys \u3092\u4f7f\u3046\u3068\u3001\u4f8b\u3048\u3070 WebAudioAPI \u306e ScriptProcessor \u306a\u3069\u3082\u4f7f\u3048\u308b\u3002<br \/>\n\u3053\u3053\u3067 FFT \u3068\u304b\u3092 Rust \u3067\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308c\u3070\u5b09\u3057\u3044\u304b\u3082\u3057\u308c\u306a\u3044\u3002<br \/>\n\u305f\u3060\u3057\u3001\u3053\u306e\u3088\u3046\u306a\u7169\u96d1\u3067 unwrap \u307e\u307f\u308c\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u30cf\u30e1\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">wasm_bindgen<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">wasm_bindgen<\/span><span class=\"p\">::<\/span><span class=\"nn\">prelude<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"nn\">futures<\/span><span class=\"p\">::<\/span><span class=\"nn\">prelude<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">wasm_bindgen_futures<\/span><span class=\"p\">::{<\/span><span class=\"n\">JsFuture<\/span><span class=\"p\">,<\/span> <span class=\"n\">future_to_promise<\/span><span class=\"p\">};<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">wasm_bindgen<\/span><span class=\"p\">::<\/span><span class=\"nn\">prelude<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">wasm_bindgen<\/span><span class=\"p\">::<\/span><span class=\"n\">JsCast<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">js_sys<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">web_sys<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">serde_derive<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[wasm_bindgen]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">window<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">window<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">document<\/span> <span class=\"o\">=<\/span> <span class=\"n\">window<\/span><span class=\"nf\">.document<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">media_devices<\/span> <span class=\"o\">=<\/span> <span class=\"n\">window<\/span><span class=\"nf\">.navigator<\/span><span class=\"p\">()<\/span><span class=\"nf\">.media_devices<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">#[derive(Serialize)]<\/span>\r\n    <span class=\"k\">struct<\/span> <span class=\"n\">Constraints<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">audio<\/span><span class=\"p\">:<\/span> <span class=\"nb\">bool<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">video<\/span><span class=\"p\">:<\/span> <span class=\"nb\">bool<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">constraints<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">JsValue<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_serde<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">Constraints<\/span><span class=\"p\">{<\/span><span class=\"n\">audio<\/span><span class=\"p\">:<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">video<\/span><span class=\"p\">:<\/span> <span class=\"k\">false<\/span><span class=\"p\">})<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">prm<\/span> <span class=\"o\">=<\/span> <span class=\"n\">media_devices<\/span><span class=\"nf\">.get_user_media_with_constraints<\/span><span class=\"p\">(<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">MediaStreamConstraints<\/span> <span class=\"k\">as<\/span> <span class=\"n\">JsCast<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">::<\/span><span class=\"nf\">unchecked_from_js_ref<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">constraints<\/span><span class=\"p\">))<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">cb<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Closure<\/span><span class=\"p\">::<\/span><span class=\"nf\">wrap<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"k\">move<\/span> <span class=\"p\">|<\/span><span class=\"n\">media_stream<\/span><span class=\"p\">:<\/span> <span class=\"n\">JsValue<\/span><span class=\"p\">|{<\/span>\r\n            <span class=\"nn\">console<\/span><span class=\"p\">::<\/span><span class=\"k\">log<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">js_sys<\/span><span class=\"p\">::<\/span><span class=\"nn\">Array<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">JsValue<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_str<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello, ?!\"<\/span><span class=\"p\">)));<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">src<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Url<\/span><span class=\"p\">::<\/span><span class=\"nf\">create_object_url_with_source<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">media_stream<\/span><span class=\"nf\">.into<\/span><span class=\"p\">())<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">audio<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">HtmlAudioElement<\/span><span class=\"p\">::<\/span><span class=\"nf\">new_with_src<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">src<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"p\">(<\/span><span class=\"n\">audio<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">HtmlMediaElement<\/span><span class=\"p\">)<\/span><span class=\"nf\">.set_autoplay<\/span><span class=\"p\">(<\/span><span class=\"k\">true<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"p\">(<\/span><span class=\"n\">audio<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">HtmlMediaElement<\/span><span class=\"p\">)<\/span><span class=\"nf\">.set_controls<\/span><span class=\"p\">(<\/span><span class=\"k\">true<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">cb<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Closure<\/span><span class=\"p\">::<\/span><span class=\"nf\">wrap<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"k\">move<\/span> <span class=\"p\">|<\/span><span class=\"n\">ev<\/span><span class=\"p\">|{<\/span>\r\n                <span class=\"nn\">console<\/span><span class=\"p\">::<\/span><span class=\"k\">log<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">js_sys<\/span><span class=\"p\">::<\/span><span class=\"nn\">Array<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">JsValue<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_str<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello, ?!\"<\/span><span class=\"p\">)));<\/span>\r\n                <span class=\"k\">let<\/span> <span class=\"n\">actx<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">AudioContext<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n                <span class=\"k\">let<\/span> <span class=\"n\">processor<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"n\">actx<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">BaseAudioContext<\/span><span class=\"p\">)<\/span><span class=\"nf\">.create_script_processor<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n                <span class=\"k\">let<\/span> <span class=\"n\">cb<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Closure<\/span><span class=\"p\">::<\/span><span class=\"nf\">wrap<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"k\">move<\/span> <span class=\"p\">|<\/span><span class=\"n\">ev<\/span><span class=\"p\">:<\/span> <span class=\"n\">Event<\/span><span class=\"p\">|{<\/span>\r\n                    <span class=\"c\">\/\/ let abuf = (ev.as_ref() as &amp;AudioProcessingEvent).input_buffer().unwrap();<\/span>\r\n                    <span class=\"c\">\/\/ \u3084\u3063\u3066\u3089\u308c\u3093\uff01<\/span>\r\n                    <span class=\"nn\">console<\/span><span class=\"p\">::<\/span><span class=\"k\">log<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">js_sys<\/span><span class=\"p\">::<\/span><span class=\"nn\">Array<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nn\">JsValue<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_str<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Hello, ?!\"<\/span><span class=\"p\">)));<\/span>\r\n                <span class=\"p\">})<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"nf\">FnMut<\/span><span class=\"p\">(<\/span><span class=\"n\">Event<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"n\">processor<\/span><span class=\"nf\">.set_onaudioprocess<\/span><span class=\"p\">(<\/span><span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">cb<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unchecked_ref<\/span><span class=\"p\">()));<\/span>\r\n                <span class=\"p\">(<\/span><span class=\"n\">processor<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">AudioNode<\/span><span class=\"p\">)<\/span><span class=\"nf\">.connect_with_audio_node<\/span><span class=\"p\">((<\/span><span class=\"n\">actx<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">BaseAudioContext<\/span><span class=\"p\">)<\/span><span class=\"nf\">.destination<\/span><span class=\"p\">()<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">());<\/span>\r\n                <span class=\"n\">cb<\/span><span class=\"nf\">.forget<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"p\">})<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"nf\">FnMut<\/span><span class=\"p\">(<\/span><span class=\"n\">Event<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"p\">(<\/span><span class=\"n\">audio<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">EventTarget<\/span><span class=\"p\">)<\/span><span class=\"nf\">.add_event_listener_with_callback<\/span><span class=\"p\">(<\/span><span class=\"s\">\"loadedmetadata\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">cb<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unchecked_ref<\/span><span class=\"p\">())<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"p\">(<\/span><span class=\"n\">document<\/span><span class=\"nf\">.body<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">()<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Node<\/span><span class=\"p\">)<\/span><span class=\"nf\">.append_child<\/span><span class=\"p\">(<\/span><span class=\"n\">audio<\/span><span class=\"nf\">.as_ref<\/span><span class=\"p\">())<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"n\">cb<\/span><span class=\"nf\">.forget<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"p\">})<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"nf\">FnMut<\/span><span class=\"p\">(<\/span><span class=\"n\">JsValue<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">prm<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prm<\/span><span class=\"nf\">.then<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">cb<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"n\">cb<\/span><span class=\"nf\">.forget<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>JS\u306eAPI \u306e\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3072\u3068\u3064\u66f8\u304f\u306b\u3057\u3066\u3082 wasm_bindgen \u306e Closure \u3092\u4f7f\u3063\u3066<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">cb<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Closure<\/span><span class=\"p\">::<\/span><span class=\"nf\">wrap<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"k\">move<\/span> <span class=\"p\">|<\/span><span class=\"n\">ev<\/span><span class=\"p\">|{<\/span>\r\n    <span class=\"c\">\/\/ hogehoge<\/span>\r\n    <span class=\"n\">cb<\/span><span class=\"nf\">.forget<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">})<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"nf\">FnMut<\/span><span class=\"p\">(<\/span><span class=\"n\">Event<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u306e\u3088\u3046\u306b\u30af\u30ed\u30fc\u30b8\u30e3\u306eGC\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3082\u81ea\u5206\u3067\u6307\u5b9a\u305b\u306d\u3070\u306a\u3089\u305a\u9762\u5012\u304f\u3055\u3044\u3002(https:\/\/rustwasm.github.io\/wasm-bindgen\/examples\/closures.html)<br \/>\n\u305d\u3057\u3066 IF \u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u306f\u6570\u767e\u884c\u306b\u53ca\u3076\uff08\u305d\u308c\u3067\u3082 emscripten \u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3088\u308a\u306f\u9065\u304b\u306b\u5c11\u306a\u3044\u304c\uff09<\/p>\n<p>\u307e\u305f\u73fe\u72b6 web-sys \u306e\u3059\u3079\u3066\u306e\u6a5f\u80fd\u3092\u4f7f\u3046\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b features \u3092 WebIDL \u6bce\u306b\u66f8\u3044\u3066\u3044\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\uff08\u305d\u306e\u3046\u3061\u6539\u5584\u3055\u308c\u308b\u3089\u3057\u3044<\/p>\n<pre class=\"post-pre\"><code><span class=\"nn\">[package]<\/span>\r\n<span class=\"py\">name<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"iso-rust3\"<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1.0\"<\/span>\r\n<span class=\"py\">authors<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span><span class=\"s\">\"Legokichi Duckscallion &lt;legokichi@gmail.com&gt;\"<\/span><span class=\"p\">]<\/span>\r\n<span class=\"py\">edition<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"2018\"<\/span>\r\n\r\n<span class=\"nn\">[lib]<\/span>\r\n<span class=\"py\">crate-type<\/span> <span class=\"p\">=<\/span> <span class=\"nn\">[\"cdylib\"]<\/span>\r\n\r\n<span class=\"nn\">[dependencies]<\/span>\r\n<span class=\"py\">futures<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1\"<\/span>\r\n<span class=\"py\">serde<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"py\">serde_json<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"py\">serde_derive<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n<span class=\"nn\">wasm-bindgen<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.2\"<\/span><span class=\"p\">,<\/span> <span class=\"py\">features<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span> <span class=\"s\">\"serde-serialize\"<\/span> <span class=\"p\">]<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"py\">wasm-bindgen-futures<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<span class=\"py\">js-sys<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n\r\n<span class=\"nn\">[dependencies.web-sys]<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<span class=\"py\">features<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s\">'AbortController'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'AbortSignal'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'AddEventListenerOptions'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"err\">...<\/span>\r\n    <span class=\"s\">'XmlHttpRequestUpload'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'XmlSerializer'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'XsltProcessor'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'console'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'css'<\/span>\r\n<span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<h2>\u60c5\u5831\u6e90<\/h2>\n<p>https:\/\/rustwasm.github.io\/ &#8211; \u516c\u5f0f\u30d6\u30ed\u30b0<\/p>\n<p>https:\/\/rustwasm.github.io\/book\/ &#8211; \u5165\u9580\u8005\u5411\u3051\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/p>\n<p>https:\/\/rustwasm.github.io\/wasm-bindgen\/ &#8211; \u7db2\u7f85\u7684\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n<p>https:\/\/github.com\/rustwasm\/awesome-rust-and-webassembly &#8211; Awesome<\/p>\n<p>https:\/\/github.com\/rustwasm\/rfcs &#8211; rfcs<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rust \u306b\u304a\u3051\u308b wasm-bindgen \u3068 wasm-pack \u3068 cargo-web \u3068 stdweb [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45099","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"Rust \u306b\u304a\u3051\u308b wasm-bindgen \u3068 wasm-pack \u3068 cargo-web \u3068 stdweb [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-02T18:35:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T12:03:37+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u9896\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u9896\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-01-02T18:35:20+00:00\",\"dateModified\":\"2024-04-29T12:03:37+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e\",\"name\":\"\u79d1, \u9896\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g\",\"caption\":\"\u79d1, \u9896\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/keying\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"- Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/","og_locale":"zh_CN","og_type":"article","og_description":"Rust \u306b\u304a\u3051\u308b wasm-bindgen \u3068 wasm-pack \u3068 cargo-web \u3068 stdweb [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-01-02T18:35:20+00:00","article_modified_time":"2024-04-29T12:03:37+00:00","author":"\u79d1, \u9896","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u79d1, \u9896","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"5 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/","name":"- Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-01-02T18:35:20+00:00","dateModified":"2024-04-29T12:03:37+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/"]}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e","name":"\u79d1, \u9896","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g","caption":"\u79d1, \u9896"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/keying\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45099-2\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=45099"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45099\/revisions"}],"predecessor-version":[{"id":87354,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45099\/revisions\/87354"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=45099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=45099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=45099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}