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Screen readers, in the context of charts, are assistive technologies that convert digital text and interface elements into speech or braille, allowing users with visual impairments to navigate and understand graphical data on the screen. This involves adding semantic structure, descriptive labels, and metadata so the chart's content can be understood through auditory feedback, enabling users with visual impairments to understand trends, values, and relationships within the chart without needing to see the visual representation. Proper implementation not only improves usability, particularly in data driven environments, but also supports compliance with established accessibility standards such as WCAG (Web Content Accessibility Guidelines).

Several ASP.NET Core charting components support the use of screen readers, such as:

• ComponentOne Charts for ASP.NET MVC (part of ComponentOne Studio ASP.NET MVC by MESCIUS) follows WAI-ARIA accessibility guidelines and provides charts for ASP.NET Core.
• Telerik ASP.NET Core Chart (part of Telerik UI for ASP.NET Core) uses inline SVG elements and supports assistive technologies, making chart data interpretable for screen readers.
• jQWidgets ASP.NET Core MVC (part of jQWidgets) has built-in WAI-ARIA support and offers screen reader friendly charts for ASP.NET Core projects using Tag Helpers.
• Infragistics ASP.NET Core Charts (part of Infragistics Professional) facilitates screen reader compatibility with comprehensive ARIA integration and text-based summaries.

For an in-depth analysis of features and price, visit our comparison of ASP.NET Core chart components.

Compare ASP.NET Core Chart Components

SpreadJS is a high-performance JavaScript spreadsheet and data presentation component designed for enterprise web applications. It enables developers to deliver Excel-like functionality directly within their web solutions, providing advanced features such as data binding, complex calculations, pivot tables, charts, and extensive formatting options. Fully compatible with modern JavaScript frameworks like React, Angular, and Vue, SpreadJS allows seamless integration and customization, empowering development teams to create interactive, data-driven user experiences without relying on external spreadsheet applications.

The SpreadJS 18.2 adds a new Transform command which enables you to apply LAMBDA functions directly to a selected range of cells and replace the original content with calculated results. This simplifies data transformations - whether mapping, filtering, or reshaping - into a clean, single-step process. With this feature, you can select any range and apply a custom LAMBDA formula - for example, converting units, adjusting values, or formatting entries - and have SpreadJS overwrite the selection with the computed results immediately. This removes manual steps like inserting formulas in separate cells, copying values, or pasting back as values. This feature integrates with SpreadJS’s existing LAMBDA capabilities to offer more interactive and efficient spreadsheet manipulation.

To see a full list of what's new in 18.2, see our release notes.

SpreadJS is licensed per developer and includes 1 Year Maintenance (major and minor version releases and unlimited support phone calls). SpreadJS requires an Annual or Perpetual Deployment License. The optional Add-ons are available at an additional cost, and require a SpreadJS license. See our SpreadJS licensing page for full details.

For more information, visit our SpreadJS product page.