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947 B
istanbul-lib-instrument
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.
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The old API that is mostly unchanged (except for incompatibilities noted) and performs the instrumentation using babel as a library.
-
A
programVisitorfunction 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 calledbabel-plugin-istanbul.
Incompatibilities and changes to instrumentation behavior can be found in v0-changes.md.