Reactjs 如何使用Typescript在React中使用WebWorkers
我有一些沉重的画布代码,我想卸载到一个网络工作者。当我遵循中的示例并将worker typescript文件的路径传递到构造函数中时Reactjs 如何使用Typescript在React中使用WebWorkers,reactjs,typescript,webpack,web-worker,Reactjs,Typescript,Webpack,Web Worker,我有一些沉重的画布代码,我想卸载到一个网络工作者。当我遵循中的示例并将worker typescript文件的路径传递到构造函数中时 New Worker(“./PaintCanvas.ts”)代码已成功编译,但当它运行时,工作程序似乎未正确找到代码,因为它抛出一个错误,称为Uncaught SyntaxError:Unexpected token'canvas.width?window.innerWidth:canvas.width; canvas.height=window.innerHei
New Worker(“./PaintCanvas.ts”)
代码已成功编译,但当它运行时,工作程序似乎未正确找到代码,因为它抛出一个错误,称为Uncaught SyntaxError:Unexpected token'canvas.width?window.innerWidth:canvas.width;
canvas.height=window.innerHeight>canvas.height?window.innerHeight:canvas.height;
this.offscreen=canvas.transferControlToOffscreen();
this.worker=新工人(“/PaintCanvas.ts”);
this.worker.postMessage(this.offscreen,[this.offscreen]);
}
}
render(){
返回(
);
}
}
导出默认画布;
这就是我试图加载的工人:
export default class PaintCanvas extends Worker {
private canvas?: OffscreenCanvas;
private intervalId?: number;
private frame: number;
private frameSet: number;
private noiseData: ImageData[][];
private noiseNum: number[];
private overlayFrame: number[];
private overlayData: Uint8ClampedArray[][];
private overlayNum: number[];
private workers: (Worker|undefined)[];
constructor(stringUrl: string | URL) {
super(stringUrl);
this.frame = 0;
this.frameSet = 0;
this.noiseData = [[], [], []];
this.noiseNum = [0, 0, 0];
this.overlayFrame = [0, 0, 0];
this.overlayData = [[], [], []];
this.overlayNum = [0, 0, 0];
this.workers = [undefined, undefined, undefined];
}
onmessage = (event: MessageEvent) => {
this.canvas = event.data;
this.frame = 0;
this.frameSet = 0;
this.noiseData = [[], [], []];
this.noiseNum = [0, 0, 0];
this.overlayFrame = [0, 0, 0];
this.overlayData = [[], [], []];
this.overlayNum = [0, 0, 0];
if (this.workers[0]) {
this.workers[0].terminate();
}
if (this.workers[1]) {
this.workers[1].terminate();
}
if (this.workers[2]) {
this.workers[2].terminate();
}
this.makeNoise(0);
this.makeNoise(1);
this.makeNoise(2);
if (this.intervalId) {
window.clearInterval(this.intervalId);
}
this.intervalId = window.setInterval(this.paintNoise, 100);
}
makeNoise(index: number) {
if (this.canvas) {
const width = this.canvas.width;
const height = this.canvas.height;
this.workers[index] = new Worker("./FillCanvas.ts");
if (this.workers[index]) {
this.workers[index]!.onmessage = (event) => {
if (this.overlayNum[index] < 4 || !event.data[0]) {
this.overlayData[index].push(event.data);
this.overlayNum[index]++;
if (this.overlayNum[index] < 4) {
this.workers[index]!.postMessage([width, height]);
} else {
this.workers[index]!.postMessage([width, height, new Uint8ClampedArray(width * height * 4), this.overlayData[index][0]]);
this.overlayFrame[index]++;
}
} else {
if (event.data[0]) {
this.noiseData[index].push(new ImageData(event.data[0], width, height));
this.noiseNum[index]++;
if (this.noiseNum[index] < 30) {
this.workers[index]!.postMessage([width, height, event.data[1], this.overlayData[index][Math.ceil(this.overlayFrame[index] / 4) % 4]]);
this.overlayFrame[index]++;
} else {
this.workers[index] = undefined;
}
}
}
}
this.workers[index]!.postMessage([width, height]);
}
}
}
paintNoise() {
if (this.noiseNum[0] > 10) {
this.frame++;
if (this.frame % this.noiseNum[this.frameSet % 3] === 0) {
this.frameSet++;
}
if (this.canvas) {
let ctx = this.canvas.getContext("2d");
if (ctx) {
ctx.putImageData(this.noiseData[this.frameSet % 2][this.frame % this.noiseNum[this.frameSet % 2]], 0, 0);
}
}
}
}
}
导出默认类PaintCanvas扩展工作程序{
私人画布?:OffscreenCanvas;
专用有效期?:编号;
私有帧:数字;
私有框架集:编号;
private noiseData:ImageData[];
私有noiseNum:编号[];
私有覆盖帧:编号[];
私有覆盖数据:uint8clampedaray[]];
私有覆盖层:编号[];
私人工人:(工人|未定义)[];
构造函数(stringUrl:string | URL){
super(stringUrl);
此.frame=0;
this.frameSet=0;
this.noiseData=[]、[]、[];
this.noiseNum=[0,0,0];
this.overlayFrame=[0,0,0];
this.overlydata=[]、[]、[];
this.overlayNum=[0,0,0];
this.workers=[未定义,未定义,未定义];
}
onmessage=(事件:MessageEvent)=>{
this.canvas=event.data;
此.frame=0;
this.frameSet=0;
this.noiseData=[]、[]、[];
this.noiseNum=[0,0,0];
this.overlayFrame=[0,0,0];
this.overlydata=[]、[]、[];
this.overlayNum=[0,0,0];
if(此.workers[0]){
此.workers[0].terminate();
}
如果(此.workers[1]){
this.workers[1].terminate();
}
如果(此.workers[2]){
this.workers[2].terminate();
}
这是makeNoise(0);
这就是制造噪音(1);
这就是制造噪音(2);
如果(本条有效){
window.clearInterval(this.intervalId);
}
this.intervalId=window.setInterval(this.paintNoise,100);
}
makeNoise(索引:编号){
if(this.canvas){
const width=this.canvas.width;
const height=this.canvas.height;
this.workers[索引]=新的Worker(“./FillCanvas.ts”);
if(this.workers[索引]){
this.workers[index]!.onmessage=(事件)=>{
if(this.overlayNum[index]<4 | |!event.data[0]){
this.overlydata[index].push(event.data);
这个.overlayNum[索引]+;
if(此.overlayNum[索引]<4){
this.workers[index]!.postMessage([width,height]);
}否则{
this.workers[index]!.postMessage([width,height,new-uint8clampedaray(width*height*4),this.overlydata[index][0]);
这个.overlayFrame[索引]+;
}
}否则{
if(事件数据[0]){
this.noiseData[index].push(新的ImageData(event.data[0],宽度,高度));
this.noiseNum[index]++;
if(此.noiseNum[索引]<30){
this.workers[index]!.postMessage([width,height,event.data[1],this.overlydata[index][Math.ceil(this.overlyframe[index]/4)%4]);
这个.overlayFrame[索引]+;
}否则{
this.workers[索引]=未定义;
}
}
}
}
this.workers[index]!.postMessage([width,height]);
}
}
}
油漆噪音(){
if(this.noiseNum[0]>10){
这个.frame++;
if(this.frame%this.noiseum[this.frameSet%3]==0){
这个.frameSet++;
}
if(this.canvas){
设ctx=this.canvas.getContext(“2d”);
如果(ctx){
ctx.putImageData(this.noiseData[this.frameSet%2][this.frame%this.noiseNum[this.frameSet%2]],0,0);
}
}
}
}
}
正如您所看到的,一旦工作正常,我的工人也将创建自己的工人。您还应该注意顶部的workerPath导入。几年前,我尝试实现顶级答案,这确实使代码本身可见,但只要代码仍然是typescript模块,它就无法工作。相反,我尝试使用类的构造函数实例化worker,例如
new PaintCanvas()
,但这仍然需要一个url,它仍然只能找到index.html文件。我还尝试将worker文件放在react公共文件夹中,并使用公共url引用它。tsconfig文件自动注意到了这一点,并将该文件添加到“include”部分,我认为这看起来很有希望,但它仍然尝试执行index.html。
所以我的问题是,在react中是否有一种惯用的非黑客方式来实现typescript中的Web Workers,或者我应该使用我在别处见过的黑客方式之一?我知道Web Worker API是最新成熟的,所以我希望我在网上找到的很多答案都不再需要了<
export default class PaintCanvas extends Worker {
private canvas?: OffscreenCanvas;
private intervalId?: number;
private frame: number;
private frameSet: number;
private noiseData: ImageData[][];
private noiseNum: number[];
private overlayFrame: number[];
private overlayData: Uint8ClampedArray[][];
private overlayNum: number[];
private workers: (Worker|undefined)[];
constructor(stringUrl: string | URL) {
super(stringUrl);
this.frame = 0;
this.frameSet = 0;
this.noiseData = [[], [], []];
this.noiseNum = [0, 0, 0];
this.overlayFrame = [0, 0, 0];
this.overlayData = [[], [], []];
this.overlayNum = [0, 0, 0];
this.workers = [undefined, undefined, undefined];
}
onmessage = (event: MessageEvent) => {
this.canvas = event.data;
this.frame = 0;
this.frameSet = 0;
this.noiseData = [[], [], []];
this.noiseNum = [0, 0, 0];
this.overlayFrame = [0, 0, 0];
this.overlayData = [[], [], []];
this.overlayNum = [0, 0, 0];
if (this.workers[0]) {
this.workers[0].terminate();
}
if (this.workers[1]) {
this.workers[1].terminate();
}
if (this.workers[2]) {
this.workers[2].terminate();
}
this.makeNoise(0);
this.makeNoise(1);
this.makeNoise(2);
if (this.intervalId) {
window.clearInterval(this.intervalId);
}
this.intervalId = window.setInterval(this.paintNoise, 100);
}
makeNoise(index: number) {
if (this.canvas) {
const width = this.canvas.width;
const height = this.canvas.height;
this.workers[index] = new Worker("./FillCanvas.ts");
if (this.workers[index]) {
this.workers[index]!.onmessage = (event) => {
if (this.overlayNum[index] < 4 || !event.data[0]) {
this.overlayData[index].push(event.data);
this.overlayNum[index]++;
if (this.overlayNum[index] < 4) {
this.workers[index]!.postMessage([width, height]);
} else {
this.workers[index]!.postMessage([width, height, new Uint8ClampedArray(width * height * 4), this.overlayData[index][0]]);
this.overlayFrame[index]++;
}
} else {
if (event.data[0]) {
this.noiseData[index].push(new ImageData(event.data[0], width, height));
this.noiseNum[index]++;
if (this.noiseNum[index] < 30) {
this.workers[index]!.postMessage([width, height, event.data[1], this.overlayData[index][Math.ceil(this.overlayFrame[index] / 4) % 4]]);
this.overlayFrame[index]++;
} else {
this.workers[index] = undefined;
}
}
}
}
this.workers[index]!.postMessage([width, height]);
}
}
}
paintNoise() {
if (this.noiseNum[0] > 10) {
this.frame++;
if (this.frame % this.noiseNum[this.frameSet % 3] === 0) {
this.frameSet++;
}
if (this.canvas) {
let ctx = this.canvas.getContext("2d");
if (ctx) {
ctx.putImageData(this.noiseData[this.frameSet % 2][this.frame % this.noiseNum[this.frameSet % 2]], 0, 0);
}
}
}
}
}
import PaintCanvasWorker from 'worker-loader!./PaintCanvas';
// ... later ...
this.worker = new PaintCanvasWorker();