How can it be written so succinctly in javascript? - css

I am newbie with javascript and write some code at styles.css file like this :
#nav .subnav li:hover {
color: #000;
background-color: #ccc;
}
and
#nav > li:hover > a {
color: #000;
background-color: #ccc;
display: inline-block;
}
It effect to nav, ofcourse.
Here is my index.html file (nav)
<div id="header">
<ul id="nav">
<li>Home</li>
<li>Bane</li>
<li>Tour</li>
<li>Contact</li>
<li>
More
<ul class="subnav">
<li>Merchandise</li>
<li>Extras</li>
<li>Media</li>
</ul>
</li>
</ul>
</div>
They said to me that I can write the code at styles.css file to be more brief like this :
#nav .subnav li:hover a,
#nav > li:hover > a {
color : #000;
background-color: #ccc;
}
I tried it and it ran very ok, but I have some question.
First, as you can see, the 1st code is #nav .subnav li:hover , why in the brief code is #nav .subnav li:hover a ? I thought that when I wrote #nav .subnav li:hover, it is enough because it impact to li:hover, why in the last code they add "a" ?
The second question is why they delete display: inline-block; ? They said that when I delete this display: inline-block; at #nav > li:hover > a, I can add this code
#nav > li {
display: inline-block;
}
but, I thought that it impact to the li class, not li:hover ?
Thank you very much for your time.

"a" added because they want something to happen to "a" tag when its parent "Li" tag is in the hover state
Your second question isn't clear to me. But "a" tag's default display state is "inline" and "li" tag's default display is "block". Usually when we are creating a navbar we make "li" display inline-block to make the navbar horizontal

Related

I couldnt change dropdown menu font size

I tried to write font-size in css of nav li ul but it didnt change the font size.
I only want dropdown submenus to have smaller text size than regular links how do i do that?
Here is Jsfiddle http://jsfiddle.net/N2Ert/1/
<li>Projelerimiz
<ul>
<li>Submenu1</li>
<li>Submenu2</li>
</ul>
</li>
.nav li ul {
display:none;
position:absolute;
min-width:20px;
margin-left:50px;
margin-top:-35px;
}
You just need to add this css code:
.nav li:hover > ul li a{
font-size: 10px;
}
Demo Link

Trying to add sub-menu to css

I'm trying to add a sub-menu to the css at http://jsfiddle.net/hozey/9dGuc/, but can't seem to get the hang of it. Could someone please help this newbie? Here's the html. I want to make a sub-menu for Horses 1, 2 and 3.
<div class="menu">
<ul>
<!--begin to insert contents-->
<li class="item-first">Home</li>
<li><a class="current">Portfolio ▼</a>
<ul>
<li>Horses 1</li>
<li>Horses 2</li>
<li>Horses 3</li>
<li>Dogs</li>
<li>People</li>
<li>Stills</li>
</ul>
</li>
<li>Order</li>
<li>Contact Me</li>
</ul>
</div> <!-- end menu -->
</div>
Here's the css I've got so far:
body {
margin: 0px;
}
#wrapper {
border: px solid black;
margin: 1em auto;
font-family: Arial,Helvetica,sans-serif;
width: 760px;
text-align: left;
background-color: #cccccc;
overflow:hidden;
height:150px;
}
.menu {font-family: arial, sans-serif;width:760px;position:relative;font-size:0.7em; margin:0px auto;}
.menu ul li a {display:block;
text-decoration:none;
width:97px;
height:25px;
text-align:center;
color:white;
padding-left:1x;
border:px solid;
border-width:0 0px 0px 0;
background:;
line-height:25px;
font-size:1.0em;}
.menu ul {padding:0;margin:0;list-style-type: none; }
.menu ul li {float:left;position:relative;}
.menu ul li ul {visibility:hidden;position:absolute;}
.menu ul li:hover a, .menu ul li a:hover {color:white;background:#3BA110;}
.menu ul li:hover ul, .menu ul li a:hover ul {visibility:visible;left:0;}
.menu ul li:hover ul li a, .menu ul li a:hover ul li a {display:block;
background:#444444;
color:white;
width:97px;
padding-left:1px;
border-right:none;}
.menu ul li:hover ul li a:hover, .menu ul li a:hover ul li a:hover {background:#3BA110;color:white;}
This will get you started, though it's far from perfect. As Zeta pointed out, without the child combinator, making a deeply nested menu is not only difficult, but it also results in bad code.
What you need to do is make sure you know exactly what each of your selectors is targeting. You want your second and third tier lis to behave differently, so you need to be certain that your selector for the second isn't also effecting the third.
Literally all that I did to solve your problem was apply the child combinator all over the place on the code you already had, as I knew you were writing code for first and second tier menu items. After that, I tacked on a simple selector to target third tier items and had a working menu.
Were I you, I'd go back through your code and make sure you know exactly what your selectors are targeting, then rewrite your CSS. It's not too hard to do, and it can result in surprisingly little code for very complex nested menus.
html (for just a third tier menu item)
...
<!-- the rest of the menu -->
<li>
Horses 1
<ul>
<li>Submenu1</li>
<li>Submenu2</li>
</ul>
</li>
<!-- the rest of the menu -->
...
css (for just the third tier)
.menu ul ul ul { visibility: hidden; position: absolute; top: 0; left: 97px; }
.menu ul ul li:hover ul { visibility: visible; background-color: #eee; }
And just for a few examples of how to select different tier menus and items:
css (to target the 'header items')
.menu > ul > li { }
css (to target the first dropdown)
.menu > ul > li > ul { }
css (to target the first dropdown items)
.menu > ul > li > ul > li { }
.menu ul ul > li { } /* This will also target submenu items */
.menu > ul > ul > li { }
css (to target the submenu to a dropdown item)
.menu > ul > li > ul > li > ul { }
.menu ul ul ul { }
css (to target the submenu item of a dropdown item)
.menu > ul > li > ul > li > ul > li { }
.menu ul ul ul li { }
What we can gather from the above code is that you don't want to stop doing using the child combinator until you're at the last tier of your menu. In general, menu ul[n] li, where I'm using pseudocode to represent n number of uls, will target any li deeper than n depth in your menu. So in your case, it's fine to use .menu ul ul ul li as the third tier is the last one. But you wouldn't want to use .menu ul ul li to write style that's meant just for the first dropdown, as that selector also targets the third, fourth, and so on depth as well.
Just for completeness, the bare minimum to get a working deeply nested menu is done by thinking like this:
You want anything after the first ul to start off as hidden. So you can do:
.menu ul ul { visibility: hidden; }
This hides any ul that is nested within another ul. So it hits all of our submenus. And it only applies to lists within our menu.
Then you want each submenu to be visible when you're hovering over its parent's link. We can handle all of our submenus with a single selector, I think:
.menu li:hover > ul { visibility: visible; }
That should be general enough to apply to every level of a menu. Reading right to left, we make the ul visible when we're hovering over an li that is its direct parent. And, like usual, this only applies to an li that is within our menu.
Of course, you could use a, too, if you wanted.
CSS Menus are a great time to think and learn about CSS efficiency. Once you have a working menu, see if you can optimize it! The tags I posted here might not be the quickest; I just thought of them off the top of my head. I'll leave it to you to find the best selectors to use.
And that's really the basics of complex nested CSS menus. Hope it helps.

Hover on nested item can affect its parent?

I have a menu using pure CSS, hover a parent li item display the the nested list. A simplified example:
<ul id="menu-top" >
<li class="menu-item">
Forums
<ul class="sub-menu">
<li>Register</li>
<li>Activate</li>
<li>Members</li>
</ul>
</li>
</ul>
The css:
.navigation ul.menu li:hover { background: #ccc} //hover the parent item changes it bg color
.navigation ul.sub-menu li {
display:none;
}
.navigation ul li:hover > ul.sub-menu li { display: block; }
It works ok, but I'm trying to add an "persistent" effect, I want keep the parent style set when hovering also the sub-item.
I tried this but can't get working:
.navigation ul.sub-menu li:hover > .navigation ul.menu li { background: #ccc}
I don't know if this is possible without javscript or else, also can't find anything about using ">" in CSS.
THanks for any help
:hover is triggered on all ancestors of the element that is being hovered over, so .navigation ul.menu li:hover { background: #ccc; } should work just fine.
Alternatively, someday we should be able to use :has().
.menu-item:hover {
background-color:#ccc;
}
.sub-menu li:hover {
background-color:#666;
}

CSS nested elements ignored by Chrome/Firefox?

This might be painfully easy, so my apologies in advance, but I'm on Hour 5 trying to figure this mess out. Here's the UL I'm trying to present as a horizontal bar:
<div id="navbarwrapper">
<ul id="navbar">
<li>Search</li>
<li>Tips</li>
<li>Neighborhoods</li>
<li>Relocation</li>
</ul>
</div>
And here's the strange CSS that seems to malfunction:
#navbar {}
#navbar ul {
list-style-type: none;
margin: 0px;
padding: 0px;
}
#navbar li {display: inline;}
#navbar ul li a {text-decoration:line-through;}
The problem I'm having is that with this markup, the text wrapped in anchor tags in the HTML aren't receiving line-through (I'm using line-through as a placeholder because it's obvious when it's working or not; I don't actually want a line-through in the end).
Here's the strange bit. If I replace the "#navbar ul li a" nest with the following, it works:
#navbar li a {text-decoration:line-through;}
Furthermore, if I change "#navbar li{display: inline;}" with the following, I lose the inline property:
#navbar ul li{display:inline;}
Is it because I'm duplicating with "#navbar" and "ul"? It seems entirely too strange to me, and I feel as though I've been able to use this syntax in the past without error.
Thanks for the help in advance.
Your ul already have id of navbar. That's why #navbar ul doesn't match anything.
ul#navbar will match.
Your selectors are not correct.
#navbar is the UL element itself, so the selector #navbar ul does not target anything.
The correct selectors are
#navbar {
list-style-type: none;
margin: 0px;
padding: 0px;
}
#navbar li { display: inline; }
#navbar li a { text-decoration:line-through; }
#navbar ul is wrong...#navbar is the ul itself.
Your <ul> has the ID #navbar, so with #navbar ul you are actually addressing an additional ul inside your ul.
Try
ul#navbar li a {text-decoration:line-through;}

My class refuses to apply its rules to lists

I have an .active class to apply to li a for the current page.
But it keeps being overrode by my styling the main nav div.
#nav ul li a:link, #nav ul li a:visited {
color: #BBBBBB;
}
#nav ul li a:hover, .active, #nav ul .active a:link, #nav ul .active a:visited {
border-bottom: red solid 2px;
padding-bottom: 4px;
color: #fff;
}
I've tried a few variations on the second rule to try and dethrone the first, but none seem to work. (I didn't have the id in originally, but I know that id is a step above class in the cascade). Maybe I'm missing something really basic, or maybe my first rule is foolishly over specific? (I always seem to be running into this sort of problem with links, specifically)
Assuming you have markup like this:
<div id="nav">
<ul>
<li>foo</li>
<li>foo</li>
<li class="active">foo</li>
</ul>
</div>
Your CSS appears to work fine.
See http://jsfiddle.net/X7eAw/1/
You may need to add
#nav ul li.active a
to force specificity if the active class is not being applied. That selector is probably overkill however.
assuming you have the active class on your li element. If you are applying active to the anchor, then the rule should be: #nav ul li a.active:link
You can prevent a style from getting overriden in CSS by using !important tag:
#nav ul li a:hover, .active, #nav ul .active a:link, #nav ul .active a:visited {
border-bottom: red solid 2px;
padding-bottom: 4px;
color: #fff !important;
}

Resources