html - div overflow scroll: when scrolled to bottom, content starts scrolling -

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i have modal dialog scrollable div inside. div set to

overflow: scroll;

however, when user scrolls way down inside div, content behind popup starts scrolling down.

question: when popup open, don't want user able scroll main page behind it. possible?

i don't think there need me provide code, general question.

using jquery set css as

overflow: hidden

when popup open

and on popup close use

overflow : auto or overflow : scroll wish.

i think, don't need write code it.


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