World Countries Tree
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This example presents a hierarchical tree visualization of a software release structure, with node labels like "ERICSSON DYNAMIC ACTIVATION 1" and "gerrit-central" that map to a custom data.json file. It uses the D3 v5 library with its `tree()` layout and `linkHorizontal()` generator to draw the branching connections as SVG paths. Labels are rendered as text elements sized by node depth, and the entire viewport supports interactive pan and zoom via D3’s `zoom()` behavior. The tree’s root is derived using `hierarchy()`, and the layout’s size is computed from the browser window’s dimensions.
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