html - What's the difference between `overflow` properties `overlay` and `scroll` -

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what's difference between overflow properties overlay , scroll. both adding scrollbar overflowing content.

scroll show scroll bars irrespective of if content being clipped or not.

overlay webkit proprietary property depreciated. same thing auto does. display scroll bar when necessary.

just side note current possible values overflow 

auto hidden scroll visible

great article here css tricks documenting difference. https://css-tricks.com/the-css-overflow-property/


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