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FPL Now Runs JavaScript

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Fluency Support

The Fluency Programming Language (FPL) now accepts JavaScript (ES6). Parsers and reports written in JavaScript — including the code AI assistants generate — run in Fluency without being translated by hand.

The update rolls out to all instances the weekend of May 17–18, 2025. Existing FPL code runs unchanged.

Why it matters​

Writing a parser used to mean learning FPL's own syntax. AI assistants already write good JavaScript: given a sample log line and the fields you want, they produce a working parser in minutes. With ES6 support, that code can be pasted into a processor, validated and deployed as it is.

What is supported​

  • JavaScript control flow: else if, switch, while, do…while, for…in and for…of.
  • Template strings, the spread operator, destructuring, === and optional semicolons.
  • JavaScript regular-expression literals, and the common String, Array, Math, JSON and Object methods.

A few features are not available yet, such as the regular-expression global flag (/g). The full list, with the limitations, is in the FPL JavaScript (ES6) Support release notes. See also the FPL reference.

Splash Summary

The Fluency Programming Language (FPL) now accepts JavaScript (ES6). Parsers and reports written in JavaScript — including the code AI assistants generate — run in Fluency without being translated by hand.

The update rolls out to all instances the weekend of May 17–18, 2025. Existing FPL code runs unchanged.