Question

./ node_modules / ng2-pdf-viewer / fesm5 / ng2-pdf-viewer.js中的错误模块构建失败（来自./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js）： TypeError：无法读取未定义的属性“种类” 位于isAngularDecoratorMetadataExpression（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：265：35）在checkNodeForDecorators（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：77：21）在visitNodes上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16144：30）在Object.forEachChild（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16370：24）在checkNodeForDecorators上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：68：31）在visitNode上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16135：24）在Object.forEachChild（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16265：21）在checkNodeForDecorators上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：68：31）在visitNode上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16135：24）在Object.forEachChild（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16322：24）在checkNodeForDecorators上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：68：31）在visitNode上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16135：24）在Object.forEachChild（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16333：24）在checkNodeForDecorators上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ src \ transforms \ scrub-file.js：68：31）在visitNode上（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16135：24）在Object.forEachChild（E：\ Mohamed Mostafa Work \ new_project \ reservation \ node_modules @ angular-devkit \ build-optimizer \ node_modules \ typescript \ lib \ typescript.js：16229：21）

Answer 1

我遇到了同样的错误，但最终通过以下解决方案解决了。首先将Unistall ng2-pdf-viewer查看器然后安装-npm install ng2-pdf-viewer@5.3.4

Answer 2

从根文件夹删除package-lock.json 编辑package.json并按如下所示更改ng2-pdf-viewer版本

"ng2-pdf-viewer": "5.3.4"

运行以下命令

npm install
npm build --prod

它应该解决问题

Answer 3

导航到您的应用程序文件夹并首先运行npm i命令，您似乎错过了很多软件包

Answer 4

尝试删除您的node_modules文件夹，然后运行npm i

Answer 5

较低版本的ng2-pdf-viewer对我来说很好

Answer 6

搜索了很长时间后，它对我有用。

将@ angular-devkit / build-angular升级到版本：“〜0.803.19”，然后prod构建可以正常工作。在package.json中进行了以下更改。

"devDependencies": {
  "@angular-devkit/build-angular": "~0.803.19",
   ...
}

这适用于ng2-pdf-viewer：6.3.0和Angular 8.3.19

希望这会有所帮助！

Answer 7

请在 package.josn 文件中将您的angular-devkit依赖项更改为最新版本：

我在以下依赖项中更改了版本，并且它与-prod命令

一起使用

MotionEventBroadcaster.registerReceiver(new MotionEventReceiver() {
    @Override
    protected void onReceive(MotionEvent motionEvent) {
        Log.d(TAG, motionEvent.toString());
    }
});

此解决方案像魅力一样工作：）

Answer 8

将angular.json中存在的below属性设置为false可以为我解决问题：

“ buildOptimizer”：否

为什么当我要ng build --prod时出现此问题？

8 个答案: