Simple question: Can anyone point to a resource or knows anything about which standard of Javascript is supported in Google Apps Script?
I assume naturally that ES5 is fully supported, but what about ES6 (and even 7)?
Note: I mean the built-in code editor, which will appear if you open a Spreadsheet (for example), and click Tools > Script editor...
According to the docs Apps Script is based on JavaScript 1.6.
This table explains the correlation to the ES standards.
From https://developers.google.com/apps-script/guides/services/#basic_javascript_features (January 27, 2019)
Basic JavaScript features
Apps Script is based on JavaScript 1.6, plus a few features from 1.7 and 1.8. Many basic JavaScript features are thus available in addition to the built-in and advanced Google services: you can use common objects like
Array,Date,RegExp, and so forth, as well as theMathandObjectglobal objects. However, because Apps Script code runs on Google's servers (not client-side, except for HTML-service pages), browser-based features like DOM manipulation or theWindowAPI are not available.
In the native editor it appears you are limited to an earlier version of JS (~ES5).
There is an official tool called "Clasp" though, which lets you write typescript (.ts) files with ES6+ syntax and then compile & upload your files to Drive with clasp push --watch.
Alternatively, you can use Webpack in your local setup as detailed in this answer.
My guess is AngluarJS is since it was made by a google developer.
