This example shows a continuous, animated line chart that grows from left to right across a black SVG canvas. Each step appends a new random value to the path, creating a lightweight, real-time visualization of random data. The code uses d3.select, d3.range, and the join API to update a single path element, with setInterval controlling the animation loop. The rendering approach leverages D3 v7’s SVG path generation and direct manipulation of the `d` attribute.