javascript - for JavaScriptesnext - for anything newer than the babel 2015 presetes2015 - for the babel 2015 presetes5 - for code that will run in node 0.10 and IE8 (no feature syntaxes)import - for import/export module syntax, aka the CommonJS/Node Module Systemrequire - for require/module.exports module syntax, aka the ES/ES6/JS Module Systemarrowsawaitclassesconstdefaultsdestructuringforofgeneratorsgetsetletmappromisesproxiesreflectrestsetspreadsymbolstemplate stringsdecorators