Bootstrap: Modal script adds margin-right and padding-right for .sticky-top

[Gnevyshev]

Windows 7
Firefox 61.0.2

Why modal script adds margin-right and padding-right for .sticky-top?

[Johann-S]

We just add padding-right to the body to center horizontally our moral when there is no scrollbar

[Johann-S]

Ok I made this CodePen to demonstrate the issue: https://codepen.io/Johann-S/pen/KxKpOR

[VDWWD]

Fixed it with this

<script type="text/javascript">

    $('body').on('show.bs.modal', function () {
        $('.sticky-top').css('margin-left', '-=0px');
    });

    $('body').on('hidden.bs.modal', function () {
        $('.sticky-top').css('margin-left', 'auto');
    });

</script>

[Johann-S]

@mdo I'm a bit lost here, I understand the issue, I know how to fix it but I'm not sure what I'll do is the right fix.

My fix will not add margin-right or padding-right if the element have our container class (.container), but I'm not sure if it's the right things to do 🤔

My fix replace those lines :
https://github.com/twbs/bootstrap/blob/v4-dev/js/src/modal.js#L432-L433

By:

        const fixedContent = [].slice.call(document.querySelectorAll(Selector.FIXED_CONTENT))
          .filter((elem) => !elem.classList.contains('container'))
        const stickyContent = [].slice.call(document.querySelectorAll(Selector.STICKY_CONTENT))
          .filter((elem) => !elem.classList.contains('container'))

/CC @XhmikosR if you have any ideas, @zalog because you worked on that too

[Gnevyshev]

Now you can see the problem on the site:
http://agnevy6d.beget.tech
Click "ЗАКАЗАТЬ ЗВОНОК" under phone numbers.

Pay attention to file "main.css", line 38.
Empirically, I realized that setting these properties solves the problem.
If uncomment line 38 (and reload the page), there will be no problem.

[XhmikosR]

I too see the issue for sure. @Johann-S's fix seems OK, do we have a PR for this?

[Johann-S]

Nope because I'm not sure my fix is correct and won't create side effects

[SharakPL]

Why do you even go for margin and padding? body gets padding-right when modal is activated so everything else should be contained within the body. With v.4.2.1 when body gets class modal-open and style i.e. padding-right: 17px added, fixed elements get extra padding-right and sticky elements get extra padding-right and negative margin-right. That simply looks bad:

FIX:
Both padding and margin should be left as they are!

Sticky element will be contained by the parent's width so nothing needs changing here (only when browser doesn't do sticky).
Fixed element is contained by the viewport's width, but you can position it properly with right: 17px.
To be precise it's right: <whatever is added to body as padding-right>.

https://codepen.io/SharakPL/pen/OdRayP

[Ana06]

any update?

[cosmo-101]

This is still not fixed so this is my solution:

$('body').on('show.bs.modal', function () { $('.sticky-top').addClass("fixModal"); }); $('body').on('hidden.bs.modal', function () { $('.sticky-top').removeClass("fixModal"); });

And the css class .fixModal

.fixModal {
    padding-right: 0 !important;
    margin-right: 0 !important;
}

[cosmo-101]

@XhmikosR I still have problems even with home solution with this issue. It will be solved on the next release?

[XhmikosR]

As you can see, the issue is still open and it even has the label help wanted added, so I'd say no :P

Any PRs which might fix this are welcome as usual :)

[Seth10001]

I just ran into this problem when migrating from v3 to v4. Looks like it might have been fixed in #30621, but it's still waiting on a fix for a test conflict issue

[utilmind]

Having the same issue. Steps to reproduce in my web app:

1. Open any modal dialog with sticky panel inside.
2. This dialog have a button, that opens another dialog (it temporary hide the first dialog in bs.shown event)
3. Close the second dialog (first dialog will be shown again)
4. Close the first dialog.
5. Re-open the first dialog. Now sticky panel have extra "margin-right: -17px;"

UPD. I have fixed my problem applying patch by @muhamadamin1992 https://github.com/twbs/bootstrap/pull/30621/commits/1c9f4a456ef55f0a499a45658b28a1865b297235

        $(stickyContent).each(function (index, element) {
          if (window.innerWidth <= element.clientWidth + _this10._scrollbarWidth) { // this is added line
            var actualMargin = element.style.marginRight;
            var calculatedMargin = $(element).css('margin-right');
            $(element).data('margin-right', actualMargin).css('margin-right', parseFloat(calculatedMargin) - _this10._scrollbarWidth + "px");
          }
        }); // Adjust body padding