如何將自己的node.js腳本添加到Angular 4項目

Question

我有一個文件function.js，它導出函數以與一些api通訊並返回值。 它使用請求庫進行通信。 我在node.js應用程序中使用它。 如何在我的angular 4應用程序中導入/使用它？

我以為將此文件安裝為node_module。 因此，我創建了新的文件夾函數，即function.js，package-json和node_modules文件夾。 然后通過命令將其安裝在ng4應用中

npm install --save ./function 

然后在types.d.ts中聲明

declare var Myfunction: any

並將其導入我的組件中

import * as Myfunction from "function"

但是當我嘗試使用它時，我得到一個錯誤：

ERROR in /Users/i343346/order-site/src/app/order/order.component.ts (37,12): Unexpected token. A constructor, method, accessor, or property was expected.
ERROR in /Users/i343346/order-site/src/app/order/order.component.ts (37,13): Function implementation is missing or not immediately following the declaration.

更新我嘗試了@Z。 Bagley answear，現在我可以導入文件了。 但出現錯誤：

WARNING in ./node_modules/ajv/lib/compile/index.js 13:21-34 Critical dependency: the request of a dependency is an expression
at CommonJsRequireContextDependency.getWarnings (/Users/i343346/order-site/node_modules/webpack/lib/dependencies/CommonJsRequireContextDependency.js:27:4)
at Compilation.reportDependencyErrorsAndWarnings (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:677:24)
at Compilation.finish (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:535:9)
at applyPluginsParallel.err (/Users/i343346/order-site/node_modules/webpack/lib/Compiler.js:512:17)
at /Users/i343346/order-site/node_modules/tapable/lib/Tapable.js:289:11
at _addModuleChain (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:481:11)
at processModuleDependencies.err (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:452:13)
at _combinedTickCallback (internal/process/next_tick.js:73:7)
at process._tickCallback (internal/process/next_tick.js:104:9)

WARNING in ./node_modules/ajv/lib/async.js 96:20-33 Critical dependency: the request of a dependency is an expression
at CommonJsRequireContextDependency.getWarnings (/Users/i343346/order-site/node_modules/webpack/lib/dependencies/CommonJsRequireContextDependency.js:27:4)
at Compilation.reportDependencyErrorsAndWarnings (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:677:24)
at Compilation.finish (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:535:9)
at applyPluginsParallel.err (/Users/i343346/order-site/node_modules/webpack/lib/Compiler.js:512:17)
at /Users/i343346/order-site/node_modules/tapable/lib/Tapable.js:289:11
at _addModuleChain (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:481:11)
at processModuleDependencies.err (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:452:13)
at _combinedTickCallback (internal/process/next_tick.js:73:7)
at process._tickCallback (internal/process/next_tick.js:104:9)

WARNING in ./node_modules/ajv/lib/async.js 119:15-28 Critical dependency: the request of a dependency is an expression
at CommonJsRequireContextDependency.getWarnings (/Users/i343346/order-site/node_modules/webpack/lib/dependencies/CommonJsRequireContextDependency.js:27:4)
at Compilation.reportDependencyErrorsAndWarnings (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:677:24)
at Compilation.finish (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:535:9)
at applyPluginsParallel.err (/Users/i343346/order-site/node_modules/webpack/lib/Compiler.js:512:17)
at /Users/i343346/order-site/node_modules/tapable/lib/Tapable.js:289:11
at _addModuleChain (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:481:11)
at processModuleDependencies.err (/Users/i343346/order-site/node_modules/webpack/lib/Compilation.js:452:13)
at _combinedTickCallback (internal/process/next_tick.js:73:7)
at process._tickCallback (internal/process/next_tick.js:104:9) 

我認為是與請求庫連接的，瀏覽器可能不支持。

Answer 1

在Angular 4項目中包含自定義javascript函數的一種簡單方法是將該項目包含在資產文件夾中，然后使用require將其導入到組件打字稿中。

SRC /資產/ example.js

export function test() {
    console.log('test');
}

SRC /應用程序/ app.component.ts

（在@Component(...)之前）

declare var require: any;
const example = require('../assets/example');

（在export class AppComponent implements OnInit { ...內部export class AppComponent implements OnInit { ... ）

ngOnInit() {
  example.test();
}

Answer 2

我認為您可能還需要通過腳本標記將代碼包含在index.html中。

您可能會發現此其他答案很有用： https : //stackoverflow.com/posts/40635697/edit