Question

运行我的项目

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

获取以下错误消息

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

我发现很难为图书馆建设者找到有关此错误的信息，所以我将其发布在这里。我们不能仅仅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7一起正常工作，在构建库时必须导出所有装饰器元数据。为此，请将以下内容添加到您的lib的tsconfig.json中：

"compilerOptions": {
  "emitDecoratorMetadata": true
}

Answer 2

这不是一个永久性的解决方案，但是我只能使用datepicker在生产中使用它。我去了angular.json中的生产配置，并将buildOptimizer更改为false。

Answer 3

将 ng-multiselect-dropdown的版本降级为0.2.3 可能会解决此问题。

Answer 4

只需从包装中删除插入号^符号即可，即

"ng-multiselect-dropdown": "^0.2.3" to "ng-multiselect-dropdown": "0.2.3"

解决了我的问题。

无法读取未定义的属性“种类”

4 个答案: