How to resolve ej undefined issue when using the Report Viewer properties

This issue occurs when the type references for the Bold Reports components are not properly referred in the Angular application. This issue can be resolved by registering the @bold-reports/types under the typeRoots and add the typings jquery and reports.all to the tsconfig.app.json or the tsconfig.json file.

```js
{
  ...
  ...
  "compilerOptions": {
    ...
    ...
    "typeRoots": [
      "node_modules/@types",
      "node_modules/@boldreports/types"
    ],
    "types": [
      "jquery",
      "reports.all"
    ]
  },
  ...
  ...
}
```

If you have still faced the issue of 'ej' is not defined after the above configuration in Angular CLI latest version 7, refer to the following code sample at the top of your app.component.ts file in your application where you have rendered Syncfusion Components(model file) to resolve the issue.

 `/// <reference types="reports.all" />`

  import { Component } from '@angular/core';

 @Component({
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css']
 })
 export class AppComponent {
   ...
   ...
 }
 ```