Field date closure dependency

field_date.js still has a dependency on closure. In the short term, we are going to exclude it from the build script as it’s not included in blockly_compressed.js

There are a few options being floated around about what to do about it moving forward. Here are some ideas:

• Convert it to use an open source date picker library that isn’t closure
• Once that’s converted, we can move it out of core into demos.

Filing this issue to keep track of that work.

We should also update our documentation to provide instructions of how to include the date field. Now that closure is gone, there will be a few extra tasks one needs to complete.

[samelhusseini]

More details on this change:

• We want the date field to become a demo field, so we’d move it to https://github.com/google/blockly/tree/develop/demos/custom-fields (similar to turtle and pitch)
• Since it’s a demo, you’d want to use CDNs to include any frameworks, as we wouldn’t be able to ship any dependencies for this.
• Clean up field_date from core/

Let me know if you have any questions. Thanks for picking this up!

[samelhusseini]

With #3554 developers have the ability to build Blockly with the closure library in order to make use of FieldDate. I’ve also updated the FieldDate documentation to reflect the steps required for including FieldDate in their build (Those changes will be live when the release is published).