JS BarChart - no d3
This example shows a blank HTML page with a yellow canvas that stretches to fill the browser window. The data object contains labels and values from 1 to 8, but the code never draws bars or any visualization. Using plain JavaScript and the Canvas API, it sets the canvas dimensions to match `window.innerWidth` and `window.innerHeight`, then retrieves the 2D rendering context but leaves it unused. The page demonstrates basic canvas setup without any charting library.