## istanbul-lib-coverage [](https://greenkeeper.io/) [](https://travis-ci.org/istanbuljs/istanbul-lib-coverage) An API that provides a read-only view of coverage information with the ability to merge and summarize coverage info. Supersedes `object-utils` and `collector` from the v0 istanbul API. See the docs for the full API. ```js var libCoverage = require('istanbul-lib-coverage'); var map = libCoverage.createCoverageMap(globalCoverageVar); var summary = libCoverage.createCoverageSummary(); // merge another coverage map into the one we created map.merge(otherCoverageMap); // inspect and summarize all file coverage objects in the map map.files().forEach(function(f) { var fc = map.fileCoverageFor(f), s = fc.toSummary(); summary.merge(s); }); console.log('Global summary', summary); ```