On 120Hz and 144Hz displays, some animations still feel stuttery. What implementation mistakes usually cause this and how do you diagnose them quickly.
Yoshiii
Usually it’s main-thread work, layout-triggering properties like top/left/width, or timing that assumes 60Hz, so I check DevTools for long frames first and move motion to transform and opacity.
.card {
will-change: transform;
transition: transform 180ms linear;
}
.card:hover {
transform: translateY(-4px);
}
Ellen 
