SystemJS（带有 jspm 的 Aurelia）无法从 jspm_packages 文件夹加载 "aurelia-pal-browser"

Question

我已按照 https://www.danylkoweb.com/Blog/getting-started-with-aurelia-in-aspnet-mvc-EH 中的说明，第 3-5 步将 Aurelia 安装到我的 asp.net mvc 核心应用程序中（即运行ning npm install、jspm init、 jspm 安装 aurelia-framework 和 jspm 安装 aurelia-bootstrapper)。

我的 "startup code" 目前看起来是这样的：

<script src="jspm_packages/system.js"></script>
<script src="config.js"></script>
<script>
    SystemJS.import('aurelia-bootstrapper');
</script>

当我运行应用程序时，我可以在 Chrome 开发工具上看到很多 Aurelia 资源（js 文件）加载到 /jspm_packages/npm 文件夹下，但我也得到像这样的错误：

Uncaught (in promise) Error: (SystemJS) XHR error (404 Not Found) loading http://localhost:39535/aurelia-pal-browser.js Error: XHR error (404 Not Found) loading http://localhost:39535/aurelia-pal-browser.js Error loading http://localhost:39535/aurelia-pal-browser.js

出于某种原因，SystemJS 开始在我的应用程序的根目录中寻找 aurelia-pal-browser.js。我想它找不到 jspm_packages\npm\aurelia-pal-browser@1.1.0 文件夹，但它在那里，我在 config.js 文件中有相同的版本号。

完整 config.js，因为我在运行执行 jspm 命令后得到它：

System.config({
  baseURL: "/",
  defaultJSExtensions: true,
  transpiler: false,
  paths: {
    "npm:*": "jspm_packages/npm/*"
  },

  map: {
    "aurelia-bootstrapper": "npm:aurelia-bootstrapper@2.0.1",
    "aurelia-framework": "npm:aurelia-framework@1.0.8",
    "npm:aurelia-binding@1.1.1": {
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-task-queue": "npm:aurelia-task-queue@1.1.0"
    },
    "npm:aurelia-bootstrapper@2.0.1": {
      "aurelia-event-aggregator": "npm:aurelia-event-aggregator@1.0.1",
      "aurelia-framework": "npm:aurelia-framework@1.0.8",
      "aurelia-history": "npm:aurelia-history@1.0.0",
      "aurelia-history-browser": "npm:aurelia-history-browser@1.0.0",
      "aurelia-loader-default": "npm:aurelia-loader-default@1.0.0",
      "aurelia-logging-console": "npm:aurelia-logging-console@1.0.0",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-pal-browser": "npm:aurelia-pal-browser@1.1.0",
      "aurelia-polyfills": "npm:aurelia-polyfills@1.1.1",
      "aurelia-router": "npm:aurelia-router@1.1.1",
      "aurelia-templating": "npm:aurelia-templating@1.1.4",
      "aurelia-templating-binding": "npm:aurelia-templating-binding@1.1.0",
      "aurelia-templating-resources": "npm:aurelia-templating-resources@1.2.0",
      "aurelia-templating-router": "npm:aurelia-templating-router@1.0.1"
    },
    "npm:aurelia-dependency-injection@1.2.1": {
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-event-aggregator@1.0.1": {
      "aurelia-logging": "npm:aurelia-logging@1.2.0"
    },
    "npm:aurelia-framework@1.0.8": {
      "aurelia-binding": "npm:aurelia-binding@1.1.1",
      "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.2.1",
      "aurelia-loader": "npm:aurelia-loader@1.0.0",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-path": "npm:aurelia-path@1.1.1",
      "aurelia-task-queue": "npm:aurelia-task-queue@1.1.0",
      "aurelia-templating": "npm:aurelia-templating@1.1.4"
    },
    "npm:aurelia-history-browser@1.0.0": {
      "aurelia-history": "npm:aurelia-history@1.0.0",
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-loader-default@1.0.0": {
      "aurelia-loader": "npm:aurelia-loader@1.0.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-loader@1.0.0": {
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-path": "npm:aurelia-path@1.1.1"
    },
    "npm:aurelia-logging-console@1.0.0": {
      "aurelia-logging": "npm:aurelia-logging@1.2.0"
    },
    "npm:aurelia-metadata@1.0.3": {
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-pal-browser@1.1.0": {
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-polyfills@1.1.1": {
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-route-recognizer@1.1.0": {
      "aurelia-path": "npm:aurelia-path@1.1.1"
    },
    "npm:aurelia-router@1.1.1": {
      "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.2.1",
      "aurelia-event-aggregator": "npm:aurelia-event-aggregator@1.0.1",
      "aurelia-history": "npm:aurelia-history@1.0.0",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-path": "npm:aurelia-path@1.1.1",
      "aurelia-route-recognizer": "npm:aurelia-route-recognizer@1.1.0"
    },
    "npm:aurelia-task-queue@1.1.0": {
      "aurelia-pal": "npm:aurelia-pal@1.2.0"
    },
    "npm:aurelia-templating-binding@1.1.0": {
      "aurelia-binding": "npm:aurelia-binding@1.1.1",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-templating": "npm:aurelia-templating@1.1.4"
    },
    "npm:aurelia-templating-resources@1.2.0": {
      "aurelia-binding": "npm:aurelia-binding@1.1.1",
      "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.2.1",
      "aurelia-loader": "npm:aurelia-loader@1.0.0",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-path": "npm:aurelia-path@1.1.1",
      "aurelia-task-queue": "npm:aurelia-task-queue@1.1.0",
      "aurelia-templating": "npm:aurelia-templating@1.1.4"
    },
    "npm:aurelia-templating-router@1.0.1": {
      "aurelia-binding": "npm:aurelia-binding@1.1.1",
      "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.2.1",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-path": "npm:aurelia-path@1.1.1",
      "aurelia-router": "npm:aurelia-router@1.1.1",
      "aurelia-templating": "npm:aurelia-templating@1.1.4"
    },
    "npm:aurelia-templating@1.1.4": {
      "aurelia-binding": "npm:aurelia-binding@1.1.1",
      "aurelia-dependency-injection": "npm:aurelia-dependency-injection@1.2.1",
      "aurelia-loader": "npm:aurelia-loader@1.0.0",
      "aurelia-logging": "npm:aurelia-logging@1.2.0",
      "aurelia-metadata": "npm:aurelia-metadata@1.0.3",
      "aurelia-pal": "npm:aurelia-pal@1.2.0",
      "aurelia-path": "npm:aurelia-path@1.1.1",
      "aurelia-task-queue": "npm:aurelia-task-queue@1.1.0"
    }
  }
});

Answer 1

我没有阅读您链接的文章，但您可以尝试将 aurelia-pal-browser@1.1.0 作为依赖项安装，因此它已明确列在您的 package.json 和 config.js 中。

只需在命令行执行以下命令：

jspm install npm:aurelia-pal-browser

SystemJS（带有 jspm 的 Aurelia）无法从 jspm_packages 文件夹加载 "aurelia-pal-browser"

SystemJS (Aurelia with jspm) fails to load "aurelia-pal-browser" from jspm_packages folder

systemjs

aurelia

jspm

asp.net-core