There has been two major releases since Acrobat 10, yet there has been no update to the JavaScript engine to support newer version of JavaScript since version 1.8 that came with version 10 of Acrobat, as stated on the latest Acrobat DC JS API reference. Please update the decade-old-JavaScript 1.8 to the latest ECMAScript 2019 in next major release of Acrobat. Thank you for your consideration.