Forget server-side wrappers, use 4D Sessions from the client
Enhance your end users' experience in client-server applications by taking advantage of 4D sessions. Native and automatically created as soon as a use...
April 30, 2026
1 min read
4D Language
Design application logic with strong typing, object oriented principles, structured error handling, and modular class architecture. Write clear, maintainable code that works consistently across desktop, web, REST, and client server environments.
Client-server – A new way to execute logic on server
In client-server mode, your logic often requires resources hosted on the server. To run code on the server, you are used to writing dedicated project ...
April 29, 2026
1 min read
Enhancement of command syntax checking in the editor
In our previous post, we highlighted how improvements in type inference and error handling help make 4D development more reliable. The 4D code editor ...
April 28, 2026
1 min read
HTTPS Requests: macOS Keychain support is here!
With the release of 4D 21 R3, we are bringing the power of the macOS Keychain to your HTTPS requests and agents, joining our existing support for the ...
April 28, 2026
1 min read
Execute Code from Text with 4D.Method
Business applications are constantly evolving, and new logic is often required even after deployment. In some cases, applications store business rules...
April 27, 2026
1 min read
Simplify JSON Validation and Boost Robustness
When exchanging data between applications, web services, or APIs, even the slightest structural error can break everything. That’s why JSON data valid...
April 27, 2026
1 min read
Searching Across Host Projects and Components in 4D
When working on a large 4D application, it is common to split functionality across a host project and several components. This modular architecture ke...
January 21, 2026
1 min read
Better Error Handling and Type Inference for 4D Developers
When you’re coding in 4D or VS Code, clear and precise feedback from the editor makes all the difference. It helps you understand what’s happening in ...
January 20, 2026
1 min read
Goodbye 4D Internet Commands – Hello Modern Internet Integration
With the release of 4D 21, we’re officially saying goodbye to the 4D Internet Commands plugin, a long-standing companion for many developers since the...
November 17, 2025
1 min read
Trim, Trim start, and Trim end in 4D
When working with user input, data cleaning, or text formatting, one of the most common tasks is removing unwanted whitespace. Whether it's a space ac...
October 17, 2025
1 min read