Bootstrap navbar collapse media-query on custom width

问题

Helo guys, I want to modify the navbar in order to collapse on @screen-md :992px;. I have modified navbar.less, but still not working and I don't know what to do.

So how can I modify the @grid-float-breakpoint variable in order to have that menu collapsed on custom media query size?

FIDDLE:

回答1:

You can change the collapse point in 3.1 like this..

@media (max-width: 992px) {
    .navbar-header {
        float: none;
    }
    .navbar-left,.navbar-right {
        float: none !important;
    }
    .navbar-toggle {
        display: block;
    }
    .navbar-collapse {
        border-top: 1px solid transparent;
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
    }
    .navbar-fixed-top {
        top: 0;
        border-width: 0 0 1px;
    }
    .navbar-collapse.collapse {
        display: none!important;
    }
    .navbar-nav {
        float: none!important;
        margin-top: 7.5px;
    }
    .navbar-nav>li {
        float: none;
    }
    .navbar-nav>li>a {
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .collapse.in{
        display:block !important;
    }
}

http://www.bootply.com/120951

---

In Bootstrap 4, changing the breakpoint is easier. See this answer

回答2:

In variables.less change

@grid-float-breakpoint:   @screen-sm-min

to

@grid-float-breakpoint: @screen-md-min;  

or to whatever other width you would like.

It's easy and painless done this way.

回答3:

Here is the code I used to solve this, just add it to your style sheet.

@media (max-width: 1992px) {
    .navbar-header {
        float: none;
    }
    .navbar-left,.navbar-right {
        float: none !important;
    }
    .navbar-toggle {
        display: block;
    }
    .navbar-collapse {
        border-top: 1px solid transparent;
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
    }
    .navbar-fixed-top {
        top: 0;
        border-width: 0 0 1px;
    }
    .navbar-collapse.collapse {
        display: none!important;
    }
    .navbar-nav {
        float: none!important;
        margin-top: 7.5px;
    }
    .navbar-nav>li {
        float: none;
    }
    .navbar-nav>li>a {
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .collapse.in{
        display:block !important;
    }
}

回答4:

If you are using Twitter Bootstrap, the responsive collapse is already built in. You may just have to invoke it with a class in your menu. But this is the css I use in most of the Bootstrap applications I've worked with, including the one I working in right now

@media(min-width:768px) {
   .navbar-collapse {
    width: auto;
    /* more code here */
}

change the min width to the width you want it to collapse from.

来源：https://stackoverflow.com/questions/22329606/bootstrap-navbar-collapse-media-query-on-custom-width