Breaking news: Google has released a bunch of new features that will help developers do more with Apps Script.

This Wednesday marks the launching of Google annual developer conference, Google I/O. Therefore, Google harnesses the opportunity to share a bunch of new features that will help developers do more with Apps Script. these new features launched
today are:

Scripts in Google Docs

For those who want to be able to extend Google Docs just like Google Sheets, with custom menus, dialogs, and triggers. Starting today, you can do just that (plus custom sidebars, too).

Forms Service / Scripts in Google Forms

This means you can now use the Forms Service to programmatically create and modify Google Forms, including triggers and a better way to respond to form submissions. (Google have created a new 5-minute quickstart to get you going.) You can also extend the Google Forms editor with the same custom menus, dialogs, and sidebars as Google Docs.

Drive Service

For those of you who use the DocsList Service to automate your Google Drive, a newer version is now available. Drive Service comes with new features like setting the owner of a file or folder or changing the sharing settings.

Faster HtmlService

At Google I/O 2012, Google launched HtmlService to let you build custom user interfaces with secure client-side scripting. Starting today, you can enable an experimental version of the client-side sandbox that runs significantly faster in any browser that supports ECMAScript 5 strict mode.

Improved Authorization Flow and API Console Integration

Now, you can opt in to an experimental new authorization flow that requires fewer clicks. In addition, every script that uses the new flow automatically creates a project in the Google APIs Console. This makes it much easier to use Google APIs that aren’t built in to Apps Script. To upgrade a script to the new flow, select File > Upgrade authorization experience.