Summary

Fixes #12177

When a chart's container grows (e.g., window resize making the container larger), the canvas would not grow to fill the new space. The canvas style dimensions were only set initially but not updated on subsequent resizes.

Changes

• Enhanced retinaScale function in helpers.dom.ts to update the canvas style dimensions during resize if they were previously set by Chart.js
• This ensures the canvas can grow when its container grows, not just shrink

Technical Details

The fix checks if the current style dimensions differ from the chart dimensions and updates them accordingly. This maintains the behavior where Chart.js-managed styles are kept in sync with the actual chart size.