This example demonstrates a reusable text-ticker function that automatically animates long text horizontally when it exceeds its container’s width. A blue rectangle with a fixed size acts as the viewport, and a clip-path hides any text extending beyond its bounds. The implementation uses D3 v4’s `transition` with `d3.easeLinear` to move the text from right to left, then resets its position and loops indefinitely. The `tickText` function checks the text’s `getBBox().width` against a maximum width to trigger the animation.