无法读取未定义的属性“种类”

Question

运行我的项目

ng build --prod --base-href="./"

收到以下错误消息

ERROR in ./node_modules/ng-multiselect-dropdown/fesm2015/ng-multiselect-dropdown.js
Module build failed (from ./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js):
TypeError: Cannot read property 'kind' of undefined
    at isAngularDecoratorMetadataExpression (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:265:35)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:77:21)
    at visitNodes (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16514:30)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16740:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16635:21)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16703:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16692:24)
    at checkNodeForDecorators (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/src/transforms/scrub-file.js:68:31)
    at visitNode (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16505:24)
    at Object.forEachChild (/home/gayathri/Desktop/webapp8/node_modules/@angular-devkit/build-optimizer/node_modules/typescript/lib/typescript.js:16599:21)

Answer 1

不是永久性解决方案，但我仅使用 datepicker 将其投入生产。我转到 angular.json 中的生产配置并将 buildOptimizer 更改为 false。

Answer 2

我发现很难为库构建者找到有关此错误的信息，因此我将其发布在这里。我们不能只是告诉用户升级他们的 Angular 版本或禁用构建优化。

要使库与 @angular/cli 的版本 6 和 7 配合使用，您必须在构建库时导出所有装饰器元数据。为此，请将以下内容添加到tsconfig.json您的 lib 中：

"compilerOptions": {
  "emitDecoratorMetadata": true
}