This example demonstrates a simple path morphing animation controlled by user input. Two buttons, "Start Morphing" and "Reset Morphing," trigger transitions that interpolate between two SVG path definitions (`start` and `end`) using d3’s `transition.attrTween` on the `d` attribute. The code relies on D3 v6 for selection and transitions, while rendering to an inline SVG element. A static stroke path serves as the visual subject, with the animation changing its shape over a one-second duration when either button is clicked.