如何将wasm-pack生成的wasm文件导入打字稿文件中?

时间:2020-10-29 20:13:52

标签: typescript rust webassembly deno

步骤:

cargo generate --git https://github.com/rustwasm/wasm-pack-template

项目名称:project-name

// src/lib.rsj
mod utils;

use wasm_bindgen::prelude::*;

#[cfg(feature = "wee_alloc")]
#[global_allocator]
static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;

#[wasm_bindgen]
struct Temp;

#[wasm_bindgen]
impl Temp {
    pub fn hello() -> String {
        String::from("QWE")
    }
}

Cargo.toml包含所有必要的详细信息:

[lib]
crate-type = ["cdylib", "rlib"]

[features]
default = ["console_error_panic_hook"]

[dependencies]
wasm-bindgen = "0.2.63"

console_error_panic_hook = { version = "0.1.6", optional = true }

wee_alloc = { version = "0.4.5", optional = true }

[dev-dependencies]
wasm-bindgen-test = "0.3.13"

[profile.release]
opt-level = "s"

在项目目录中执行命令:

# builds and makes pkg directory in root directory with .js .ts and .wasm files
wasm-pack build

mkdir deno
touch deno/main.ts
// deno/main.ts

const filename = "<absolute-path>/pkg/project_name_bg.wasm";
const wasmCode = await Deno.readFile(filename);
const wasmModule = new WebAssembly.Module(wasmCode);
const wasmInstance = new WebAssembly.Instance(wasmModule);
const {
    Temp,
} = wasmInstance.exports;

console.log(Temp);

最后,在项目根目录中:

deno run --allow-read deno/main.ts

但是出现以下错误:

error: Uncaught TypeError: WebAssembly.Instance(): Imports argument must be present and must be 
an object
const wasmInstance = new WebAssembly.Instance(wasmModule);
                     ^
    at file:///.../project-name/deno/main.ts:5:22

这就是我要执行的操作:我想从rust文件生成.wasm文件(使用wasm-pack),将该文件导入.ts文件中,然后执行{{1 }}。但是我无法解决最后一步。

我尝试使用wasi,但没有用。 在rustwasm guide的帮助下,按照上述步骤操作,并使用deno / node代替js / deno可以很好地工作。

但是

如何使用ts + deno实现我上面提到的目标?

1 个答案:

答案 0 :(得分:0)

构造函数需要imports对象:

const imports = { };
const wasmInstance = new WebAssembly.Instance(wasmModule, imports);