Chained transition with different elements
Three heading elements—"first," "second," and "third"—fade out and back in to green, one after another, using a chained transition. The code manually triggers each element’s animation by filtering the selection and recursing through a custom `transitionNext` function, rather than relying on D3’s built-in selection chaining. It uses `d3.selectAll`, `.data([1000,2000,3000])` for per-element durations, and `.transition()`, `.style()`, and `.on("end")` to sequence the animations. The example demonstrates explicit control over chained, element-specific transitions with a single selection.
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Slight adjustment from <a href='http://bl.ocks.org/EE2dev/f3030e56e2a01c2b00861b4d15028855'>Chained transition with different elements</a> to repeatedly call the chained transaction with just one element not the whole selection.