This is a nearly complete version of Nial built using the Emscripten SDK. It comes with a transient UNIX file system, home directory and Nial library.
You can write and read files during a session but the contents will disappear when you close or reload the browser window.
Nial input for evaluation can be done in one of two ways. You can either use the single line input mode and press return to evaluate it or you can compose Nial code in the CodeMirror editor for evaluation.
In the CodeMirror window you can select a block of text and either press the Execute button or type Control/Return to execute the code. If you just want to execute a single line you can go to that line and type Control/Return.
For more information on Nial including the language definition, tutorials and details of the library functions go to the Nial Language Website.