Do you want to change the default behaviour of the Bootstrap 4 navbar? Well, you’re at the right place. The default menu for mobile is a hamburger menu when clicked it will slide to the menu items.

There are various ways to do this using jQuery/JavaScript but the best way, in our opinion, is just using plain old CSS.

So to do this, we can override the transition styles for the navbar-collapse as follows:-

Mobile Nav – Slide from Left

@media (max-width: 768px) {
    .navbar-collapse {
        position: absolute;
        top: 54px;
        left: 0;
        padding-left: 15px;
        padding-right: 15px;
        padding-bottom: 15px;
        width: 100%;
    }
    .navbar-collapse.collapsing {
        height: auto;
        -webkit-transition: left 0.3s ease;
        -o-transition: left 0.3s ease;
        -moz-transition: left 0.3s ease;
        transition: left 0.3s ease;
        left: -100%;
    }
    .navbar-collapse.show {
        left: 0;
        -webkit-transition: left 0.3s ease-in;
        -o-transition: left 0.3s ease-in;
        -moz-transition: left 0.3s ease-in;
        transition: left 0.3s ease-in;
    }
}

Mobile Nav – Slide from Right

@media (max-width: 992px) {
    .navbar-collapse {
        position: absolute;
        top: 54px;
        right: 100%;
        padding-left: 15px;
        padding-right: 15px;
        padding-bottom: 15px;
        width: 100%;
        transition: all 0.3s ease;
        display: block;
    }
    .navbar-collapse.collapsing {
        height: auto !important;
        margin-right: 50%;
        transition: all 0.3s ease;
        display: block;
    }
    .navbar-collapse.show {
        right: 0;
    }
}

We hope this quick tutorial has helped you. If you require any further assistance just leave a comment below.