Aran

Aran is a npm module for instrumenting JavaScript code. Aran was designed as a generic infrastructure for building various development-time dynamic program analyses such as: object and function profiling, debugging, control-flow tracing, taint analysis, and concolic testing. Aran is a JavaScript library without any dependencies that only exports functions for manipulating estree. Hence, additional work is required to deploy program analysis onto projects.

Disclaimer: Aran started as an academic research project and is used at SOFT lab to support publications and run experiments. Aran provides extensive support for ECMAScript2024 and achieves a 99.7% success rate against test262. However, it has rarely been used to instrument large-scale programs and performance overhead may cause issues when analyzing time-sensitive programs.