<div class="nav-bar">
  <div class="overflow-container">
    <button class="open-nav">
                <i class="fa fa-bars"></i>
                <i class="fa fa-close"></i>
            </button>
    <div class="content">
      <div class="links">
        <a class="link" href="link">
                        <i class="fa fa-home">
                        </i>
                    </a>
        <a class="link" href="link">
                        <i class="fa fa-user">
                        </i>
                    </a>
        <a class="link" href="link">
                        <i class="fa fa-info-circle">
                        </i>
                    </a>
      </div>
      <input type="text" class="search-bar" placeholder="search me.">
      <button class="search">
                    <i class="fa fa-search"></i>
                </button>
    </div>
  </div>
</div>

html,body{
    margin:0;
    height:100%;
    --nav-height:50px;
    font-family:Roboto;
    --nav-half:calc(var(--nav-height) / 2);
}
.nav-bar{
    width:400px;
    height:var(--nav-height);
    line-height: var(--nav-height);
    position:absolute;
    overflow:hidden;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    background:transparent;
    transition:0.5s;
}
.overflow-container{
    height:100%;
    width:100%;
    overflow:hidden;
}
.links{
    display:inline-block;
    position: absolute;
    width:0;
    transition:all 0.5s;
    overflow:hidden;
    background:rgb(56,186,56);
    color:#fff;
    line-height: var(--nav-height);
    border-radius:var(--nav-half);
}
.nav-bar.active .links{
    width:calc(100% - var(--nav-height));
    border-radius:0;
    border-bottom-right-radius:var(--nav-half);
}
.content{
    border-radius:var(--nav-half);
    width:calc(100% - var(--nav-height));
    transition: 0.5s;
    height:100%;
    display: inline-block;
    overflow: hidden;
}
.nav-bar.active .content{
    border-radius:0;
    border-bottom-right-radius:var(--nav-half);
}
.link{
    display:block;
    line-height: var(--nav-height);
    padding:0 30px;
    text-decoration: none;
    color:inherit;
    text-align:center;
    float:left;
    transition:0.3s;
    font-size:20px;
}
.link:hover{
    background:rgb(86,206,86);
}
.open-nav,.search{
    width:var(--nav-height);
    height:100%;
    background:rgb(56,186,56);
    color:#fff;
    border-radius:50%;
    border:0;
    float:left;
    outline:0;
    transition:0.5s;
}
.nav-bar.active .open-nav{
    background:rgb(86,206,86);
    border-radius:0;
    border-top-left-radius:var(--nav-half);
}
.nav-bar.active .search{
    border-radius:0;
    border-bottom-right-radius: var(--nav-half);
}
.nav-bar.active .search,.search:hover{
    background:rgb(6,156,250);
}
.search-bar{
    height:100%;
    border:0;
    padding:20px;
    box-sizing:border-box;
    background:#f8f8f8;
    outline:0;
    width:calc(100% - var(--nav-height));
    display:block;
    font-size:15px;
    float:left;
    transition:0.5s;
}
.search-bar:focus{
    background:#efefef;
}
.search{
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    background:rgb(56,96,250);
}
.nav-bar.active .fa-bars,.nav-bar .fa-close{display: none;}
.nav-bar.active .fa-close,.nav-bar .fa-bars{display: inline-block;}

$(".open-nav").click(function () {
    $(".nav-bar").toggleClass("active");
});