New to Telerik Reporting? Download free 30-day trial

How to load Telerik Report viewer resources locally in Angular application and use them to customize the viewer


Product Version
Product Progress® Telerik® Reporting
Project Type Angular application


Do you want to customize the report viewer's default layout and behavior? Let's find out how.


Angular requires folder called assets to be used for serving custom files, so they could be included in the production build. This is done via the assets property in the .angular-cli.json file (or .angular.json for Angular 6+ applications).

"assets": [ 

Check out the documentation for this feature here to learn how to use it:

Important notes

Keep in mind that this will require to merge the new changes for each of the local files manually on upgrade.


The following three scenarios could be applied together (if all resources have to be modified). However, if you intend to modify just one resource, for example the script file, check only the corresponding section.

Scenario 1

How to load viewer's script locally (i.e. telerikReportViewer-.js)?


I would like to change the behavior of the report viewer widget (toolbar, parameters area, document map)

How to

  1. Copy the script file from C:\Program Files (x86)\Progress\Telerik Reporting R1 2019\Html5\ReportViewer\js\telerikReportViewer-.js to assets folder
  2. In index.html load jQuery library (required for the JS logic) and the local file itself: HTML <script src=""></script> <script src="assets/telerikReportViewer-<VERSION>.js"></script>

Scenario 2

How to load viewer's HTML template locally (i.e. telerikReportViewerTemplate.html)?


I would like to change the layout of the report viewer widget (hide toolbar buttons, add additional buttons, localize string resources etc.)

How to

  1. Copy the template file from C:\Program Files (x86)\Progress\Telerik Reporting R1 2019\Html5\ReportViewer\templates\telerikReportViewerTemplate.html to assets folder
  2. Load it setting templateUrl option of the report viewer like: JavaScript <tr-viewer #viewer1 [serviceUrl]="'http://localhost:12345/api/reports/'" [templateUrl]="'..\\assets\\telerikReportViewerTemplate.html'" [reportSource]="{ report: 'SampleReport.trdp', parameters: {} }" …> </tr-viewer>

Scenario 3

How to load viewer's styles locally (i.e. telerikReportViewer.css)?


I would like to change the default styling of the viewer widget.

How to

  1. Important: This depends on the template, so make sure that local telerikReportViewerTemplate.html is used (check Scenario 2).
  2. Copy the stylesheet file from C:\Program Files (x86)\Progress\Telerik Reporting \Html5\ReportViewer\styles\telerikReportViewer.css to assets folder
  3. Open telerikReportViewerTemplate.html file and change the path to the stylesheet resource from:

    <link href="{service}resources/styles/telerikReportViewer-css" rel="stylesheet" />


    <link href="assets/telerikReportViewer.css" rel="stylesheet" />

See also

How To: Use Angular Report Viewer with Angular CLI

In this article