This example demonstrates how to create SVG elements programmatically using the native `createElementNS` API in plain JavaScript, producing a simple bar chart with red rectangles and corresponding labels. The visualization renders five bars of random widths, each paired with a text label reading "Product No : 1" through "Product No : 5". The code sets up an SVG canvas with a white background, then loops to generate each bar and label, assigning random widths via `Math.random()` and positioning them vertically in a grid-like layout. It relies on standard Document Object Model methods such as `setAttribute` and `append`, without any external libraries.