istanbul-lib-instrument
Advanced tools
Istanbul instrumenter library.
Version 1.1.x now implements instrumentation using Babel. The implementation is inspired
by prior art by @dtinth as demonstrated in the __coverage__ babel plugin.
It provides 2 "modes" of instrumentation.
The old API that is mostly unchanged (except for incompatibilities noted) and performs the instrumentation using babel as a library.
A programVisitor function for the Babel AST that can be used by a Babel plugin
to emit instrumentation for ES6 code directly without any source map
processing. This is the preferred path for babel users. The Babel plugin is
called babel-plugin-istanbul.
Incompatibilities and changes to instrumentation behavior can be found in v0-changes.md.
NYC is a command-line interface for Istanbul. It provides a higher-level interface for running tests and generating coverage reports. While 'istanbul-lib-instrument' is focused on the low-level task of instrumenting code, NYC provides a more user-friendly way to integrate coverage reporting into your workflow.
Babel-plugin-istanbul is a Babel plugin that instruments code using Istanbul. It is designed to work with Babel, making it easy to integrate code coverage into projects that use Babel for transpilation. This plugin is useful if you are already using Babel and want to add coverage instrumentation as part of your build process.
C8 is a code coverage tool that uses V8's built-in coverage collection. It provides a modern alternative to Istanbul-based tools by leveraging the native coverage capabilities of the V8 JavaScript engine. C8 can be a good choice if you are looking for a tool that integrates closely with Node.js and V8.
FAQs
Core istanbul API for JS code coverage
The npm package istanbul-lib-instrument receives a total of 53,926,853 weekly downloads. As such, istanbul-lib-instrument popularity was classified as popular.
We found that istanbul-lib-instrument demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 0 open source maintainers collaborating on the project.
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