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Zero dependencies
Only decimal.js — no runtime overhead, no transitive CVEs. Ships as ESM + CJS.
@veridtools/feel-runnerFEEL expression engine for DMN 1.5
Zero dependencies. Decimal128 precision. 5000+ tests. Full OMG conformance.
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Full DMN 1.5 FEEL
Arithmetic, strings, temporal types, durations, ranges, contexts, lists, quantified expressions, for-loops, and all 80+ standard builtins.
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Decimal128 precision
0.1 + 0.2 = 0.3, exactly. Financial-grade arithmetic using IEEE 754 Decimal128 throughout.
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Exhaustively tested
5000+ tests covering every builtin, every edge case, temporal arithmetic, null propagation, and type coercion.
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Temporal-complete
date, time, date and time, duration — with timezone support, leap year validation, and ISO 8601 formatting.
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Drop-in ready
A single evaluate() function. Pass a FEEL expression and an optional context object. Get a typed value back.