tree 790ad19b654e15c851edef10a1b0fa6d0c130c23
parent 57bce3c6621328f9410c6b55359c8748eb88d4c5
author Tao Zhou <taoalpha@google.com> 1565628782 +0200
committer Tao Zhou <taoalpha@google.com> 1565628782 +0200

Add undefined check for computed properties

Same as obervers, in polymer 2 a computed property will run when
at least one dependencies is defined. To match the behavior in v1,
return undefined if not all dependencies are defined.

Bug: Issue 10723
Change-Id: Iaa294d5bc392c6f3970cdbb59213a9d2913e6f64