- change size of section suddenly, for example cards section (images hasn't width-height size) suddenly shown on the screen and screen-layout, screen-grid become disordered
- It appears suddenly and screen layout and griding disordered
- one of usecase is use width-height size on image elements --> to don't be disorderly as soon as page loaded
- for images - use width and height size (in nextjs use
)
- good : .1s or less