@liangxibing @wangjia007bond any more comments? I did a split on javascript into javascript and javascript_with_context after PR approval. The rationale is: given javascript perf is good (with caching) so we can now deprecate eval; for vast majority use scenarios of eval and javascript, the node JSON serialization isn't needed thus why not save some time/resources and only do _node context when schema author chooses javascript_with_context. I also thought about doing some string/AST parsing to determine if the script contains reference to _node or not and auto choose node JSON serialization. But then I decided it's a bit too much over-engineering, just let schema author to choose.