# Intent to ship: BigInt This feature adds support for arbitrary-precision integers to the JavaScript language. BigInt values are a new kind of primitive. The usual arithmetic operations are extended to work on BigInt values. As specified, arithmetic operations between BigInt and Number values throw a TypeError, in order to prevent bugs and simplify implementation.
## Tracking bugs Implementation: https://bugzilla.mozilla.org/show_bug.cgi?id=1366287 Shipping: https://bugzilla.mozilla.org/show_bug.cgi?id=1527902 ## Standard https://tc39.github.io/proposal-bigint/ The standard is "stage 3" in TC39, the ECMAScript standardization committee: https://github.com/tc39/proposals#stage-3. ## Platform coverage All ## Estimated or target release 67 (soft freeze 11 march, train leaving 18 march) ## DevTools bug https://bugzilla.mozilla.org/show_bug.cgi?id=1527912 ## MDN https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt Ongoing work by the fine MDN editors to flesh this out, notably regarding increment and decrement on bigint values and the various TypedArray integrations. ## Support in other browser / JS engines Chrome / V8 implements the draft spec. Safari / JavaScriptCore has a partial implementation that is being completed on an ongoing basis by Caio Lima. ## test262 coverage Comprehensive. There are 1164 test262 files, which can be found as: find /js/src/tests/test262/ -ipath '*bigint*' -type f ## Where to send your bugs Robin Templeton (:terpri) and Andy Wingo (:wingo). Bring it on! :) _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
