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Mike Bostock authored
Code that previously assumed a global document or window now uses the related node’s ownerDocument or ownerDocument.defaultView as appropriate. If no related node is available, the corresponding code will crash; however, the rest of D3 will work just fine. For example, you can’t use d3.select(string) unless a global document is available; it just doesn’t make sense. Use d3.select(node) instead, followed by selection.select(string). Code that previously checked for a global on the window (e.g., XDomainRequest) now uses the global context (`this`) rather than the window.
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