Question

我已经在Angular7上开发了我的项目，现在我想探讨一下webAssembly。那么如何将最近的Web应用程序转换为WebAssembly？

Answer 1

您可以按照以下步骤通过Web Assembly实施角度项目

您必须在角度项目中安装Web Assembly JavaScript API

npm install @types/webassembly-js-api --dev --save
现在使用C创建您的服务

#include <emscripten.h> int EMSCRIPTEN_KEEPALIVE fibonacci(int n) { if (n == 0 || n == 1) return n; else return (fibonacci(n - 1) + fibonacci(n - 2)); }
将C编译为Web Assembly（WASM）

emcc wasm/fibonacci.c -Os -s WASM=1 -s MODULARIZE=1 -o wasm/fibonacci.js
现在在Angular中创建服务

import { Injectable } from '@angular/core'
import { Observable, BehaviorSubject } from 'rxjs'
import { filter, map } from 'rxjs/operators'

import * as Module from './../../wasm/fibonacci.js'
import '!!file-loader?name=wasm/fibonacci.wasm!../../wasm/fibonacci.wasm'

@Injectable()
class WasmService {
  module: any

  wasmReady = new BehaviorSubject<boolean>(false)

  constructor() {
    this.instantiateWasm('wasm/fibonacci.wasm')
  }

  private async instantiateWasm(url: string) {
    // fetch the wasm file
    const wasmFile = await fetch(url)

    // convert it into a binary array
    const buffer = await wasmFile.arrayBuffer()
    const binary = new Uint8Array(buffer)

    // create module arguments
    // including the wasm-file
    const moduleArgs = {
      wasmBinary: binary,
      onRuntimeInitialized: () => {
        this.wasmReady.next(true)
      },
    }

    // instantiate the module
    this.module = Module(moduleArgs)
  }

  public fibonacci(input: number): Observable<number> {
    return this.wasmReady.pipe(filter(value => value === true)).pipe(
      map(() => {
        return this.module._fibonacci(input)
      })
    )
  }
}

有关更多参考，您可以关注此博客https://malcoded.com/posts/web-assembly-angular/

在我的有角项目中实施网络组装

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