How to enable scrolling of content inside a modal

Question

I m trying to fit a lot of text into a modal box created using Twitter Bootstrap  but I m having a problem  that content refuses to scroll   I tried adding overflow scroll and overflow-y scroll  but to no avail  that merely causes it to display a scroll bar without actually enabling the scrolling   What s the cause behind that and what can I do

User · Answer

In Bootstrap 3 you have to change the css class  modal  before  bootstrap default      modal        overflow-y  auto      after  after you edit it     modal        overflow-y  scroll

User · Answer

Bootstrap will add or remove a css  modal-open  to the  lt body gt  tag when we open or close a modal  So if you open multiple modal and then close arbitrary one  the modal-open css will be removed from the body tag   But the scroll effect depend on the attribute  overflow-y  auto   defined in modal-open

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In Bootstrap css change the background attribute  position  of Modal from fixed to absolute

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Solution 1  You can declare  modal  overflow-y auto  or  modal-open  modal  overflow-y auto  if you are using below 3v of bootstrap  for upper versions it is already declared    Bootstrap adds modal-open class to body in order to remove scrollbars in case modal is shown  but does not add any class to html which also can have scrollbars  as a result the scrollbar of html sometimes can be visible too  to remove it you have to set modal show hide events and add remove overflow hidden on html  Here how to do this       modal   on  hidden bs modal   function            html   css  overflow   auto       on  shown bs modal   function            html   css  overflow   hidden            Solution 2  As modal has functionality keys  the best way to handle this is to fix height of or even better connect the height of modal with height of the viewport like this -   modal-body        overflow auto        max-height  65vh      With this method you also do not have to handle body and html scrollbars   Note 1  Browser support for vh units   Note 2  As it is proposed above  If you change  modal position fixed  to  modal position absolute   but in case page has more height than modal user can scroll too much up and modal will disappear from viewport  this is not good for user experience

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I m having this issue on Mobile Safari on my iPhone6  Bootstrap adds the class  modal-open to the body when a modal is opened   I ve tried to make minimal overrides to Bootstrap 3 2 0  and came up with the following    modal-open       position  fixed      modal       overflow-y  auto      For comparison  I ve included the associated Bootstrap styles below   Selected extract from bootstrap less modals less  don t include this in your fix       Kill the scroll on the body  modal-open     overflow  hidden        Container that the modal scrolls within  modal     display  none    overflow  hidden    position  fixed    -webkit-overflow-scrolling  touch      modal-open  modal     overflow-x  hidden    overflow-y  auto      Mobile Safari version used  User-Agent Mozilla 5 0  iPhone  CPU iPhone OS 8 1 like Mac OS X  AppleWebKit 600 1 4  KHTML  like Gecko  Version 8 0 Mobile 12B411 Safari 600 1 4

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When using Bootstrap modal with skrollr  the modal will become not scrollable    Problem fixed with stop the touch event from propagating        modalFooter   on  touchstart touchmove touchend   function e        e stopPropagation          more details at Add scroll event to the element inside  skrollr-body

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This answer actually has two parts  a UX warning  and an actual solution   UX Warning  If your modal contains so much that it needs to scroll  ask yourself if you should be using a modal at all  The size of the bootstrap modal by default is a pretty good constraint on how much visual information should fit  Depending on what you re making  you may instead want to opt for a new page or a wizard   Actual Solution  Is here  http   jsfiddle net ajkochanowicz YDjsE 2   This solution will also allow you to change the height of  modal and have the  modal-body take up the remaining space with a vertical scrollbar if necessary   UPDATE  Note that in Bootstrap 3  the modal has been refactored to better handle overflowing content  You ll be able to scroll the modal itself up and down as it flows under the viewport

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This is how I did it purely with CSS overriding some classes    modal     height  60       modal-body       height  80       overflow-y  scroll          Hope it helps you

User · Answer

If I recall correctly  setting overflow hidden on the body didn t work on all the browsers I was testing for a modal library I built for a mobile site  Specifically  I had trouble with preventing the body from scrolling in addition to the modal scrolling even when I put overflow hidden on the body   For my current site  I ended up doing something like this  It basically just stores your current scroll position in addition to setting  overflow  to  hidden  on the page body  then restores the scroll position after the modal closes  There s a condition in there for when another bootstrap modal opens while one is already active  Otherwise  the rest of the code should be self explanatory  Note that if the overflow hidden on the body doesn t prevent the window from scrolling for a given browser  this at least sets the original scroll location back upon exit   function bindBootstrapModalEvents         var  body      body            curPos   0          isOpened   false          isOpenedTwice   false       body off  shown bs modal hidden bs modal     modal         body on  shown bs modal     modal   function              if  isOpened                isOpenedTwice   true            else               isOpened   true              curPos     window  scrollTop                 body css  overflow    hidden                           body on  hidden bs modal     modal   function              if   isOpenedTwice                  window  scrollTop curPos                body css  overflow    visible                isOpened   false                    isOpenedTwice   false              If you don t like this  the other option would be to assign a max-height and overflow auto to  modal-body like so    modal-body     max-height 300px    overflow auto      For this case  you could configure the max-height for different screen sizes and leave the overflow auto for different screen sizes  You would have to make sure that the modal header  footer  and body don t add up to more than the screen size  though  so I would include that part in your calculations

User · Answer

Set height for modal-body and not for the whole modal to get a perfect scroll on modal overlay  I get it work like this    MyModal       height  450px      overflow-y  auto      Here you can set height as per your requirements

User · Answer

Actually for Bootstrap 3 you also need to override the  modal-open class on body       body modal-open        modal-open       navbar-fixed-top        modal-open       navbar-fixed-bottom        margin-right  15px     lt -- to margin-right  0px

User · Answer

I had the same issue  and found a fix as below       yourModalClassOr ID   on  shown bs modal   function  e            yourModalClassOr ID    css  max-height     window  height             yourModalClassOr ID    css  overflow-y    scroll               Important           yourModalClassOr ID    modal  handleUpdate           100  working

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After using all these mentioned solution  i was still not able to scroll using mouse scroll  keyboard up down button were working for scrolling content   So i have added below css fixes to make it working   modal-open       overflow  hidden      modal-open  modal       overflow-x  hidden      overflow-y  auto        pointer-events  auto        Added pointer-events  auto  to make it mouse scrollable

User · Answer

modal-body       max-height  80vh      overflow-y  scroll      it s works for me

User · Answer

I was able to overcome this by using the  vh  metric with max-height on the  modal-body element  70vh looked about right for my uses    modal-body      overflow-y  auto     max-height  70vh

[css] How to enable scrolling of content inside a modal?

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