如何制作响应式导航菜单？

Question

I am trying to follow this tutorial and I can't get the navigation menu to work. I have also watched this tutorial where the tutor states that by changing the position to static, one can make it responsive and look neat on a mobile device. I am trying to move my submenu more to the right and have it changed back into position absolute of around 150px but my game menu does not work too well...

I also noticed that if I changed the left position to around 200px, then it does work better but this is too far to the left:

* {
    margin: 0px;
    padding: 0px;
}

body {
    font-family: verdana;
    background-color: #abc;
    padding: 50px;
}

h1 {
    text-align: center;
    border-bottom: 2px solid #009;
    margin-bottom: 50px;
}

/* Rules for navigation menu */

ul#navmenu, ul.sub1  , ul.sub2 {
    list-style: none;

    font-size: 12px;
}

ul#navmenu li {

    width: 250px;
    text-align: center;
    position: relative; /*This is very important to get sub menu absolutely line up with it */
    float: left; /*Get elements side by side */
    margin-right: 4px;

}

ul#navmenu a {
    text-decoration: none;
    display: block;
    width: 250px;
    height: 25px;
    line-height: 25px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
}



ul#navmenu .sub1 a {
    margin-top: 5px;
}

ul#navmenu .sub2 a {
    margin-left: 10px;
}

ul#navmenu li:hover > a {       /* > child selector */
    background-color: #cfc;

}

ul#navmenu li:hover a:hover {
    background-color: #ff0;
}


ul#navmenu ul.sub1 {
    display: none;
    position: absolute;
    top: 26px;
    left: 0px;
}

ul#navmenu ul.sub2 {
    display: none;
    position: absolute;
    top: 0px;
    left: 251px;
}

ul#navmenu li:hover .sub1 {
    display: block;
}

ul#navmenu .sub1 li:hover .sub2 {
    display:block;
}

.darrow {
    font-size: 14px;
    position: absolute;
    top: 5px;
    right: 4px;
}

.rarrow {
    font-size: 14px;
    position: absolute;
    top: 8px;
    right: 4px;
}

@media screen and (max-width: 600px) {
    ul#navmenu li {

    width: 250px;
    text-align: center;
    position: relative; /*This is very important to get sub menu absolutely line up with it */
    float: center; 
    margin-right: 4px;

}

ul#navmenu a {
    text-decoration: none;
    display: block;
    width: 100px;
    height: 50px;
    line-height: 25px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
}



ul#navmenu .sub1 a {
    margin-top: 5px;

}

ul#navmenu .sub2 a {
    margin-left: 10px;
}





ul#navmenu ul.sub1 {
    display: none;
    position: absolute;
    left: 150px;
    top: -50px;


}



ul#navmenu ul.sub2 {
    display: none;
    position: static;


}

ul#navmenu li:hover .sub1 {
    display: block;
}

ul#navmenu .sub1 li:hover .sub2 {
    display:block;
}
.darrow {
    display: none;
}

.rarrow {
    display: none;
}
}

Answer 1

how to do a responsive navigation menu

Try the following. It makes use of only HTML and CSS.

 body { background: #ccc; font-family: helvetica, arial, serif; font-size: 13px; text-transform: uppercase; text-align: center; } .wrap { display: inline-block; -webkit-box-shadow: 0 0 70px #fff; -moz-box-shadow: 0 0 70px #fff; box-shadow: 0 0 70px #fff; margin-top: 40px; } /* a little "umph" */ .decor { background: #6EAF8D; background: -webkit-linear-gradient(left, #CDEBDB 50%, #6EAF8D 50%); background: -moz-linear-gradient(left, #CDEBDB 50%, #6EAF8D 50%); background: -o-linear-gradient(left, #CDEBDB 50%, #6EAF8D 50%); background: linear-gradient(left, white 50%, #6EAF8D 50%); background-size: 50px 25%;; padding: 2px; display: block; } a { text-decoration: none; color: #fff; display: block; } ul { list-style: none; position: relative; text-align: left; } li { float: left; } /* clear'n floats */ ul:after { clear: both; } ul:before, ul:after { content: " "; display: table; } nav { position: relative; background: #2B2B2B; background-image: -webkit-linear-gradient(bottom, #2B2B2B 7%, #333333 100%); background-image: -moz-linear-gradient(bottom, #2B2B2B 7%, #333333 100%); background-image: -o-linear-gradient(bottom, #2B2B2B 7%, #333333 100%); background-image: linear-gradient(bottom, #2B2B2B 7%, #333333 100%); text-align: center; letter-spacing: 1px; text-shadow: 1px 1px 1px #0E0E0E; -webkit-box-shadow: 2px 2px 3px #888; -moz-box-shadow: 2px 2px 3px #888; box-shadow: 2px 2px 3px #888; border-bottom-right-radius: 8px; border-bottom-left-radius: 8px; } /* prime */ ul.primary li a { display: block; padding: 20px 30px; border-right: 1px solid #3D3D3D; } ul.primary li:last-child a { border-right: none; } ul.primary li a:hover { color: #000; } /* subs */ ul.sub { position: absolute; z-index: 200; box-shadow: 2px 2px 0 #BEBEBE; width: 35%; display:none; } ul.sub li { float: none; margin: 0; } ul.sub li a { border-bottom: 1px dotted #ccc; border-right: none; color: #000; padding: 15px 30px; } ul.sub li:last-child a { border-bottom: none; } ul.sub li a:hover { color: #000; background: #eeeeee; } /* sub display*/ ul.primary li:hover ul { display: block; background: #fff; } /* keeps the tab background white */ ul.primary li:hover a { background: #fff; color: #666; text-shadow: none; } ul.primary li:hover > a{ color: #000; } @media only screen and (max-width: 600px) { .decor { padding: 3px; } .wrap { width: 100%; margin-top: 0px; } li { float: none; } ul.primary li:hover a { background: none; color: #8B8B8B; text-shadow: 1px 1px #000; } ul.primary li:hover ul { display: block; background: #272727; color: #fff; } ul.sub { display: block; position: static; box-shadow: none; width: 100%; } ul.sub li a { background: #272727; border: none; color: #8B8B8B; } ul.sub li a:hover { color: #ccc; background: none; } }

 <head> <meta name="viewport" content="width=device-width"> </head> <div class="wrap"> <span class="decor"></span> <nav> <ul class="primary"> <li> <a href="">Dog</a> <ul class="sub"> <li><a href="">Bulldog</a></li> <li><a href="">Mastiff</a></li> <li><a href="">Labrador</a></li> <li><a href="">Mutt</a></li> </ul> </li> <li> <a href="">Cat</a> <ul class="sub"> <li><a href="">Tabby</a></li> <li><a href="">Black Cat</a></li> <li><a href="">Wrinkly Cat</a></li> </ul> </li> <li> <a href="">Bird</a> <ul class="sub"> <li><a href="">Humming Bird</a></li> <li><a href="">Hawk</a></li> <li><a href="">Crow</a></li> </ul> </li> <li> <a href="">Horse</a> <ul class="sub"> <li><a href="">Brown Horse</a></li> <li><a href="">Race Horse</a></li> <li><a href="">Tall Horse</a></li> </ul> </li> <li> <a href="">Burger</a> <ul class="sub"> <li><a href="">Cheesy</a></li> <li><a href="">More Ketchup</a></li> <li><a href="">Some Mustard</a></li> <li><a href="">Extra Butter</a></li> </ul> </li> </ul> </nav> </div>