JavaScript: Don't attempt to constant fold already constant nodes.
JavaScript: Don't attempt to constant fold already constant nodes.

papandreou/assetgraph,slang800/assetgraph,jscinoz/assetgraph,papandreou/assetgraph,jscinoz/assetgraph,jscinoz/assetgraph,slang800/assetgraph,assetgraph/assetgraph,papandreou/assetgraph