most basic working helloworldish example
This commit is contained in:
commit
8d39036c53
124
Cargo.lock
generated
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124
Cargo.lock
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 4
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[[package]]
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name = "bumpalo"
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version = "3.16.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
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[[package]]
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name = "cfg-if"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
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[[package]]
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name = "log"
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version = "0.4.22"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
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[[package]]
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name = "once_cell"
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version = "1.20.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
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[[package]]
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name = "proc-macro2"
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version = "1.0.92"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "37d3544b3f2748c54e147655edb5025752e2303145b5aefb3c3ea2c78b973bb0"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.37"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "rustwasm"
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version = "0.1.0"
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dependencies = [
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"wasm-bindgen",
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]
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[[package]]
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name = "syn"
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version = "2.0.89"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "44d46482f1c1c87acd84dea20c1bf5ebff4c757009ed6bf19cfd36fb10e92c4e"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
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[[package]]
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name = "wasm-bindgen"
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version = "0.2.95"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "128d1e363af62632b8eb57219c8fd7877144af57558fb2ef0368d0087bddeb2e"
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dependencies = [
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"cfg-if",
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"once_cell",
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"wasm-bindgen-macro",
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]
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[[package]]
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name = "wasm-bindgen-backend"
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version = "0.2.95"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cb6dd4d3ca0ddffd1dd1c9c04f94b868c37ff5fac97c30b97cff2d74fce3a358"
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dependencies = [
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"bumpalo",
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"log",
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"once_cell",
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"proc-macro2",
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"quote",
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"syn",
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"wasm-bindgen-shared",
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]
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[[package]]
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name = "wasm-bindgen-macro"
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version = "0.2.95"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e79384be7f8f5a9dd5d7167216f022090cf1f9ec128e6e6a482a2cb5c5422c56"
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dependencies = [
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"quote",
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"wasm-bindgen-macro-support",
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]
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[[package]]
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name = "wasm-bindgen-macro-support"
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version = "0.2.95"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "26c6ab57572f7a24a4985830b120de1594465e5d500f24afe89e16b4e833ef68"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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"wasm-bindgen-backend",
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"wasm-bindgen-shared",
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]
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[[package]]
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name = "wasm-bindgen-shared"
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version = "0.2.95"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "65fc09f10666a9f147042251e0dda9c18f166ff7de300607007e96bdebc1068d"
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15
Cargo.toml
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15
Cargo.toml
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[package]
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name = "rustwasm"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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wasm-bindgen = "0.2"
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# this is necessary to build the wasm blob
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[lib]
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crate-type = ["cdylib"]
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# suppress the lint warning for the #[wasm_bindgen] directive in lib.rs
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[lints.rust]
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unexpected_cfgs = { level = "warn", check-cfg = ['wasm_bindgen']}
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2
justfile
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2
justfile
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build:
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wasm-pack build --target web --out-dir web/dist
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20
src/lib.rs
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20
src/lib.rs
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use wasm_bindgen::prelude::*;
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// the js file must be in the RUST project
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// it gets bundled
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#[wasm_bindgen(module = "/things.js")]
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extern "C" {
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fn foo() -> String;
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}
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#[wasm_bindgen]
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extern "C" {
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fn alert(s: String);
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}
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// without the line in Cargo.toml, this throws a lint warning
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#[wasm_bindgen]
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pub fn greet() {
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let from_js = foo();
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alert(format!("Hello, {from_js}"));
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}
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10
web/index.html
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10
web/index.html
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<!doctype html>
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<html>
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<head>
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<meta charset = "utf-8" />
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<title>Rust + Wasm Minimal Setup</title>
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</head>
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<body>
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<script type = "module" src = "./index.js"></script>
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</body>
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</html>
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5
web/index.js
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5
web/index.js
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import init, * as wasm from "./dist/rustwasm.js"
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await init()
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wasm.greet()
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