Hello Michael,

My name is Nikolay, and I will get hold of this thread while Neli is out of the office.

Thank you for clarifying your findings and providing more details about your setup. Here’s a summary addressing your points and your initial questions:

1. Chart "bootstrap" Theme and Compatibility

• You are correct: the "bootstrap" value for the Chart’s theme option is deprecated in recent versions of Kendo UI for jQuery Charts.
• Only the "sass" theme is officially supported for Charts in the latest releases. Setting theme: "bootstrap" with @progress/kendo-charts versions newer than 2.9.0 leads to runtime errors, such as the matrix(NaN,NaN,NaN,NaN,…) error you encountered.
• To avoid this, remove the theme: "bootstrap" option from your Chart configuration. Use the default "sass" theme, or set it explicitly if you want to be clear in your code.

Example:

$("#chart").kendoChart({
    theme: "sass",
    // ... other chart options
});

2. Dependency Version Ranges and Semantic Versioning

• The @progress/kendo-ui package specifies a dependency on @progress/kendo-charts as ^2.9.0. The caret (^) allows any newer minor or patch version within the 2.x range.
• However, the precompiled kendo.all.min.js bundle (from CDN or npm) is built with a specific version of @progress/kendo-charts (2.9.0 in your case).
• If you use a newer @progress/kendo-charts version alongside the precompiled bundle, mismatches can occur, especially if there are breaking changes or deprecated features (like the Chart "bootstrap" theme).
• This situation is not a semantic versioning violation, but a limitation of using precompiled bundles together with newer package versions.

3. Documentation Feedback

• Your point about the documentation not being clear on the Chart "bootstrap" theme deprecation is valid. I will forward this internally for documentation improvement.

Regards,
Nikolay
Progress Telerik

Hi Michael,

The kendo-ui has the following dependency for the charts package:

  },
  "dependencies": {
    "@progress/kendo-charts": "^2.9.0",
    .......
}

This means the minimum required version is 2.9.0, and npm can install newer compatible 2.x versions. The caret (^) allows updates within the same major version, so 3.0.0 would not be installed, while 2.10.x, 2.11.x, and similar versions are valid.

I tested by installing kendo-ui@2025.4.1321 with npm, and on my side the installed Charts version is 2.11.1 (node_modules/@progress/kendo-charts).

In this setup, a Bar Chart renders correctly without errors. I’ve attached a sample project that you can run with:

npm install
npm run serve

Could you please review the sample and let me know whether I’m missing any step? If possible, please share the exact local reproduction steps so we can investigate further and troubleshoot this more effectively.

Looking forward to your reply.

Regards,
Neli
Progress Telerik