Address Greptile P2 review on PR #4260. Before Chart.js' first
ResizeObserver callback fires the canvas keeps its HTML5 default
size of 300x150. With position: absolute that no longer pushes any
ancestor's intrinsic size, but on a wrapper narrower than 300px the
canvas can still poke past the wrapper for one frame before Chart.js
catches up. Adding overflow: hidden to the relative wrapper clips
that transient overflow and is the pattern Chart.js' own docs
recommend for responsive charts inside flex / grid layouts. No
steady-state behaviour change because the canvas is already sized to
the wrapper once Chart.js takes over; the React tooltip lives
outside this wrapper so it remains visible.
Yan
54e038f423