“随后的变量声明必须具有相同的类型”

Question

我正在关注此链接以使用webworker-thread启动示例节点js项目。 https://www.npmjs.com/package/webworker-threads

这里是我的TS码：

var Worker = require('webworker-threads').Worker; 
// var w = new Worker('worker.js'); // Standard API 

// You may also pass in a function: 
var worker = new Worker(function(){ 
    postMessage("I'm working before postMessage('ali')."); 
    this.onmessage = function(event) { 
    postMessage('Hi ' + event.data); 
    self.close(); 
    }; 
}); 
worker.onmessage = function(event) { 
    console.log("Worker said : " + event.data); 
}; 
worker.postMessage('ali'); 

我收到此错误：

C:\...\node_modules\ts-node\src\index.ts:300 
     throw new TSError(formatDiagnostics(diagnosticList, cwd, ts, lineOffset)) 
      ^
TSError: ⨯ Unable to compile TypeScript 
server.ts (1,5): Subsequent variable declarations must have the same type. Variable 'Worker' must be of type '{ new (stringUrl: string): Worker; prototype: Worker; }', but here has type 'any'. (2403) 
server.ts (5,25): Argument of type '() => void' is not assignable to parameter of type 'string'. (2345) 
server.ts (6,3): Supplied parameters do not match any signature of call target. (2346) 
server.ts (7,3): 'this' implicitly has type 'any' because it does not have a type annotation. (2683) 
server.ts (7,29): Parameter 'event' implicitly has an 'any' type. (7006) 
server.ts (8,5): Supplied parameters do not match any signature of call target. (2346) 
server.ts (12,29): Parameter 'event' implicitly has an 'any' type. (7006) 
    at getOutput (C:\...\node_modules\ts-node\src\index.ts:300:15) 
    at C:\...\node_modules\ts-node\src\index.ts:330:16 
    at Object.compile (C:\...\node_modules\ts-node\src\index.ts:489:17) 
    at Module.m._compile (C:\...\node_modules\ts-node\src\index.ts:382:43) 
    at Module._extensions..js (module.js:579:10) 
    at Object.require.extensions.(anonymous function) [as .ts] (C:\...\node_modules\ts-node\src\index.ts:385:12) 
    at Module.load (module.js:487:32) 
    at tryModuleLoad (module.js:446:12) 
    at Function.Module._load (module.js:438:3) 
    at Function.Module.runMain (module.js:604:10) 

Answer 1

我不保证会是这样，但是，据我看到你正在使用节点导入语法。如果要编译这个使用打字稿比我可能会建议使用打字稿导入语法：

import {Worker} from 'webworker-threads' 

，或者在您的打字稿编译器配置文件集：

"allowJs":true 

可能服务器还使节点语法。或者你也可以这样做：

var Worker: any = <any>(require('webworker-threads').Worker); 

，并且可能会编译，但会丢失类型信息。