Develop Reference

Any way to set parent background-color on the basis of child class using css?

is there any way to set parent background-color on the basis of child class using css?
here is my code
https://jsbin.com/bahodalila/edit?html,css,js,output
if child have red class parent should set background-color red.If child have yellow class parent should set background-color yellow.
<div class="par">
<div class="red">
helli
</div>
</div>
.par{
background-color:red;
}
.par{
background-color:yellow;
}
.par{
width:200px;
height:200px;
border:1px solid blue;
}
.red{
width:100px;
height:100px;
color:red;
border:1px solid;
background-color:green
}
will I use javascript in this case ? is there any way to using css ?

A pseudo element can simulate this:
.par {
width: 200px;
height: 200px;
border: 1px solid blue;
position:relative; /* here and not on child to make it relative to parent*/
z-index:0;
}
.red {
width: 100px;
height: 100px;
color: red;
border: 1px solid;
background-color: green;
}
.red::before {
content:"";
position:absolute;
z-index:-1;
top:0;
left:0;
right:0;
bottom:0;
background:inherit;
}
<div class="par">
<div class="red">
helli
</div>
</div>
<div class="par">
<div class="red" style="background:blue;">
helli
</div>
</div>

CSS and DIV do not use the parent-child methodology. You will need to create each variable in CSS and set each DIV to the CSS variable you want. I did an example using your code to show.
.par{
background-color:red;
width:200px;
height:200px;
border:1px solid blue;
}
.par-yellow{
background-color:yellow;
width:150px;
height:150px;
border:1px solid;
}
.red{
width:100px;
height:100px;
color:red;
border:1px solid;
background-color:green
}
<div class="par">
<div class="par-yellow">
<div class="red">
helli
</div>
</div>
</div>

Unfortunately there are no parent selectors on css. A workaround is only with JS posible. You could do something like:
var redElements = document.querySelectorAll(".red");
for(var i = 0; i < redElements.length; i++){
redElements[i].parentElement.style.backgroundColor = "red";
}

I have 3 issues revolving around the styling of divs

I have 3 issues I would like help with.
Issue 1.
I have a navigation bar with numerous elements inside of it. The div with the ID shopcartbar will display the the div with ID shoppingTab once it is hovered over. I did initially set a onmouseout on the shopcartbar div but then when I tried to move the cursor on to the shoppingTab div, it would disappear. I would like to be able to keep the shoppingTab div visible whilst hovering over either of these divs and for the onmouseout to work on either of these as well, or at least be able to hover from the shopcartbar div on to the shoppingTab div to keep it visible because right now it disappears as there is a tiny gap between the two which even when I used CSS to close, didn't fix the problem. Before you read the code and say that I have set it to constantly be fixed on the page, I intentionally set it to have no onmouseout event otherwise it would vanish as soon as I moved my cursor therefore for debugging purposes, I made it appear permanently forcing me to refresh the page every time I wanted it gone.
Issue 2
When I set the height of the shoppingTab div to 100%, it only covers the span tags within it and not the 9 divs just underneath those tags, leaving the content overflowing out of the div. So I want the shoppingTab div to actually extend with ALL of the content and not just stop after the span tags. Please note: the amount of content changes so it can't be a fixed pixel height or percentage.
Issue 3
I have a cookie that just places the user's name in the topnavbar div which is placed before the shopcartbar div. When I hover over the shopcartbar div to show the shoppingTab div, it makes the persons name disappear whilst leaving the text inside the shopcartbar div. I would like the text from the topnavbar div to remain as well even when the shoppingTab div is displayed upon hover. Please note: the persons name must be placed before the shopcartbardiv.
Here is the HTML that contains everything needed to solve the 3 issues.
#charset "utf-8";
/* CSS Document */
body{ /* Applies to the <body> tag */
margin:0px; /* Sets the margin on all sides to 0px */
}
.container{ /* The container class */
width:100%; /* This sets the width */
height:100%; /* This sets the height */
background-color:black; /* Sets the background colour */
font-family:"Myriad Pro"; /* Sets the font family */
}
.header{ /* The header class */
width:100%;
background-color:#323232;
color:white; /* The sets the colour of the font */
}
.body{
width:100%;
height:1100px;
background-color:white;
color:black;
text-align:center; /* Determines the positioning of the text alignment */
}
.footer{
width:100%;
height:50px;
background-color:#323232;
color:white;
text-align:center;
}
div{
display: inline-block; /* Sets the display type */
float:left; /* Sets the float position */
}
#one, #two, #three, #four{
background-color:#323232;
height:90px;
color:white;
text-align:center;
font-size:25px;
}
#slider{
background-color:#ed1c24;
height:10px;
width:100px;
position: absolute; /* Sets the position to a specific type */
left: 0; /* Sets the number of pixels from the left that this object is placed */
bottom:0; /* Sets the number of pixels from the bottom that this object is placed */
}
.inside{
margin-left:30px; /* Specifies the margin from the left side */
margin-right:30px; /* Specifies the margin from the right side */
padding-top:7px; /* Specifies the padding from the top side */
pointer-events:none; /* Specifies the cursor events */
margin-top:25px; /* Specifies the margin from the top side */
}
.button{
display: inline-block;
border-radius: 4px; /* Specifies the radius of each corner */
background-color: #ed1c24;
border:none; /* Specifies the border type */
color: #FFFFFF;
text-align: center;
font-size: 28px;
padding: 10px;
width: 200px;
transition: all 0.5s; /* Specifies the the interval over which an animation occurs */
cursor: pointer; /* Specifies the cursor type */
margin: 5px;
height:60px;
}
.button span{
cursor: pointer;
display: inline-block;
position: relative;
transition: 0.5s;
}
.button span:after{
content: '»'; /* Specifies the content of the div */
position: absolute;
opacity: 0; /* Specifies the opacity or transparency level */
top: 0; /* Specifies the distance from the top */
right: -20px; /* Specifies the distance from the right */
transition: 0.5s;
}
.button:hover span{
padding-right: 25px;
}
.button:hover span:after{
opacity: 1;
right: 0;
}
#cover{
position:fixed;
top:0;
left:0;
background:rgba(0,0,0,0.6);
z-index:5;
width:100%;
height:100%;
display:block;
}
#loginScreen{
height:300px;
width:400px;
z-index:10;
background-color:white;
no-repeat; border:7px solid #cccccc;
border-radius:10px;
margin-left:35%;
margin-top:12%;
position:relative;
padding-top:10px;
font-family:"Myriad Pro";
font-size:18px;
}
.cancel{
display:block;
position:absolute;
top:3px;
right:2px;
background:rgb(245,245,245);
color:black;
height:32px;
width:32px;
font-size:30px;
text-decoration:none;
text-align:center;
font-weight:bold;
border-radius:36px;
cursor: pointer;
}
p1{
font-style: italic;
overflow: hidden;
text-align: center;
}
p1:before, p1:after{
background-color: #000;
content: "";
display: inline-block;
height: 1px;
position: relative;
vertical-align: middle;
width: 40%;
}
p1:before{
right: 0.5em;
margin-left: -50%;
}
p1:after{
left: 0.5em;
margin-right: -50%;
}
#searchbar{
background:url(../images/searchbarbg.png) no-repeat scroll;
padding-left:30px;
height:24px;
width:180px;
border-radius:36px;
}
.product{
height:290px;
width:200px;
float:left;
border: 5px solid black;
border-radius:10px;
margin-left:3%;
margin-top:3%;
font-size:16px;
text-align:center;
cursor:pointer;
}
.product:hover{
border:5px solid #ed1c24;
}
table{
border-collapse: collapse;
}
table, td, th{
border: 0px solid black;
}
#shoppingTab{
display:none;
height:670px;
width:400px;
background-color:white;
color:black;
position:relative;
margin-top:-2px;
border-radius:10px;
color:black;
border:1px solid #323232;
padding:10px;
float:right;
z-index:50;
}
.plusbutton{
height:25px;
width:25px;
border:1px solid black;
background-color:#323232;
float:left;
border-radius:5px 0px 0px 5px;
color:white;
cursor:pointer;
}
.minusbutton{
height:25px;
width:25px;
border:1px solid black;
background-color:#323232;
float:left;
border-radius:0px 5px 5px 0px;
color:white;
cursor:pointer;
}
.quantityBox{
height:23px;
width:25px;
border-top:1px solid black;
border-bottom:1px solid black;
background-color:white;
float:left;
text-align:center;
line-height:24px;
}
.smallProduct{
height:50px;
width:390px;
float:left;
border: 5px solid black;
border-radius:10px;
font-size:16px;
cursor:pointer;
margin-bottom:10px;
overflow:hidden;
}
.smallProduct:hover{
border:5px solid #ed1c24;
}
/* #ed1c24 is red, #323232 is grey */
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div style="float:right; font-family:'Myriad Pro'; background-image:url(images/loginsignupbar.png); width:535.1px; height:30px">
<div onmouseover="document.getElementById('shoppingTab').style.display='block';" id="shopcartbar" style="float:right; font-size:24px; margin-top:-7px">
<img src="images/shoppingCart.png" height="30px"/> Shopping Cart (<span id="numberOfItems">0</span>)
</div>
<div id="shoppingTab">
Shopping Cart<br />
<div class="smallProduct" style="margin-top:5px" id="thmbproduct0"></div>
<div class="smallProduct" id="thmbproduct1"></div>
<div class="smallProduct" id="thmbproduct2"></div>
<div class="smallProduct" id="thmbproduct3"></div>
<div class="smallProduct" id="thmbproduct4"></div>
<div class="smallProduct" id="thmbproduct5"></div>
<div class="smallProduct" id="thmbproduct6"></div>
<div class="smallProduct" id="thmbproduct7"></div>
<div class="smallProduct" id="thmbproduct8"></div>
Total: $<span id="totalPrice">00</span>.00
</div>
<span id="topnavbar" style="float:right; font-size:24px; margin-top:5.5px">
</span>
</div>
<div style="float:right; clear:right"> <!-- This is the navigation menu -->
<div style="position:relative"> <!-- This is the container of the navigation menu -->
<div id="slider"></div> <!-- This is the slider bar -->
<div id="one" class="item"><div class="inside">Home</div></div> <!-- This is just one of the buttons -->
<div id="two" class="item"><div class="inside">About Us</div></div>
<div id="three" class="item"><div class="inside">Shop</div></div>
<div id="four" class="item"><div class="inside">Contact</div></div>
</div>
</div>
</div>
<div class="body"> <!-- This is the body --><br />
<span style="font-size:50px">Welcome to the store.</span><br />
<table width="90%" style="margin-left:5%; margin-bottom:2%">
<tr>
<td style="width:20%; border-right:solid black 1px; border-bottom:solid black 1px"><b>Search Tools</b></td>
<td style="border-bottom:solid black 1px"><b>Products</b></td>
<td style="border-bottom:solid black 1px"><span style="float:right; margin-bottom:1%">Search for products... <span style="color:#666"><i>(e.g. Mirage Sedan)</i></span> <input type="text" id="searchbar" onkeyup="searchProducts(this.value)"/></span></td>
</tr>
<tr>
<td style="border-right:solid black 1px; padding-top:3%" valign="top">
<b>Sort Type:</b><br /><br />
<select id="sortType">
<option value="AtoZ">A to Z</option>
<option value="ZtoA">Z to A</option>
<option value="LowtoHigh">Price (low to high)</option>
<option value="HightoLow">Price (high to low)</option>
</select>
<br /><br /><form><b>Price range:</b><br /><br /><input id="priceRange" step="100" value="42000" min="12000" max="42000" type="range"/><div id="rangeVal">0</div><br /><br /><b>Model Type:</b><br /><br /><input type="radio" name="model"/>Car<br /><input type="radio" name="model"/>SUV</form></td>
<td colspan="2">
<div class="product" id="product0"></div>
<div class="product" id="product1"></div>
<div class="product" id="product2"></div>
<div class="product" id="product3"></div>
<div class="product" id="product4"></div>
<div class="product" id="product5"></div>
<div class="product" id="product6"></div>
<div class="product" id="product7"></div>
<div class="product" id="product8"></div>
</td>
</tr>
</table>
</div>
<div class="footer"> <!-- This is the footer -->
<br />This is the footer</span>
</div>
</div>
<div id="cover">
<div id="loginScreen">
<center id="content"><br />
<span style="font-size:45px" id="popuptitle">Welcome!</span><br />
<span id="popupdescription">Please log in or sign up.</span><br />
<button class="button" style="font-size:20px; height:45px; width:150px; margin-top:15px; margin-bottom:15px" onclick="logInMenu()"><span>Log In</span></button><br /><p1>OR</p1><br />
<button class="button" style="font-size:20px; height:45px; width:150px; margin-top:15px; margin-bottom:15px" onclick="signUpMenu()"><span>Sign Up</span></button>
</center>
<a onclick="document.getElementById('cover').style.display = 'none'" class="cancel">×</a>
</div>
</div>
Desired functionality for issue 1
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style>
.container{
width:960px;
margin:auto;
}
.header{
width:960px;
height:100px;
background-color:#06F;
float:left;
}
.trolley{
width:150px;
height:30px;
background-color:white;
float:right;
border-radius:10px;
color:black;
border:1px solid black;
line-height:30px;
font-family:"Calibri";
cursor: pointer;
}
.shop{
width:960px;
height:700px;
background-color:white;
float:left;
font-family:"Calibri Light";
padding:20px;
}
#shoppingTab{
display:none;
height:400px;
width:400px;
background-color:#CCC;
color:black;
position:relative;
margin-top:1px;
border-radius:10px;
color:black;
border:1px solid black;
padding-left:10px;
float:right;
}
html{
background-color:#00F;
}
.product{
height:200px;
width:150px;
float:left;
border: 1px solid black;
border-radius:10px;
margin-right:20px;
font-size:16px;
text-align:center;
cursor:pointer;
}
.product:hover{
border:1px solid blue;
}
</style>
</head>
<body>
<div class="container">
<div class="header">
<span id="name"></span><div class="trolley" onmouseover="tabDisplay('block')" onmouseout="tabDisplay('none')"><center>Shopping Cart <span style='font-family:webdings'>¤</span> <span id="NOI" style="background-color:red; border-radius:360px; color:white; padding-left:5px;padding-right:5px">0</span></center>
<div id="shoppingTab">You have selected <span id="NOI2">0</span> items. Your total is $<span id="totalPrice">0</span><br/><span id="itemsList"></span></div>
</div>
</div>
<div class="shop" style="font-size:28px">Welcome, <span id="name2"></span>.<hr /><br/>Products<br/><hr />
<div class="product" onclick="addToCart('sunglasses', 0, 70)">Pair of sunglasses ($70)<br /><br /><span onclick="change(1)">Click to add to cart</span></div>
<div class="product" onclick="addToCart('shoes', 1, 180)">Pair of shoes ($180)<br /><br /><span onclick="change(3)">Click to add to cart</span></div>
<div class="product" onclick="addToCart('belt', 2, 20)">A belt ($20)<br /><br /><span onclick="change(3)">Click to add to cart</span></div>
</div>
</div>
</body>
</html>
<script>
var customerName = "";
var numberOfItems = 0;
var total = 0;
var items = [];
var stat = []
for(var a = 1; a <= 3; a++){
stat[a] = false;
}
function update(){
document.getElementById("NOI").innerHTML = numberOfItems;
document.getElementById("NOI2").innerHTML = numberOfItems;
document.getElementById("totalPrice").innerHTML = total;
document.getElementById("itemsList").innerHTML = items.join("<br />");
}
function tabDisplay(displayStatus){
shoppingTab.style.display = displayStatus;
}
function addToCart(productName, productID, price){
items[productID] = productName;
total += price;
numberOfItems++;
update();
}
function removeFromCart(productName, productID, price){
items.splice(productID, 1);
total -= price;
if(stat[productID]){
numberOfItems--;
}
update();
}
function change(i){
if(stat[i] == false){
stat[i] = true;
}else{
stat[i] = false;
}
}
function setCookie(cname,cvalue,exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires=" + d.toGMTString();
document.cookie = cname+"="+cvalue+"; "+expires;
}
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
function checkCookie() {
var user = getCookie("customer");
if (user != "") {
customerName = getCookie("customer");
document.getElementById("name").innerHTML = customerName;
alert("Welcome again, " + user + ".");
} else {
document.getElementById("name").innerHTML = "please set up an account";
user = prompt("Please enter your name:","");
if (user != "" && user != null) {
setCookie("customer", user, 30);
document.getElementById("name").innerHTML = user;
}
}
}
function changeCookie(){
var user = getCookie("customer");
user = prompt("Please enter your name:","");
if (user != "" && user != null) {
setCookie("customer", user, 30);
}
document.getElementById("name").innerHTML = user;
}
checkCookie();
</script>

For issue 1, you could try a setTimeout() function in the onmouseout() function linking to the actual code (to make it disappear) with a delay (in milliseconds e.g: 500)
https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout
If it doesn't work, try putting both shoppingtab and shopcartbar in a single div and use onmouseover of that div to display and hide shoppingTab

Make div responsive and control text alignment

I have the following layout (Parent div, two child divs)
wanted to make this layout responsive for browser's width, so anytime the user changes the browser's width this layout should occupies the same area of screen
also, I wanted to middle-text the content, I've tried vertical-align: middle;, display: table-cell;
any suggestions?
Markup here

this is your solution html with css
<html>
<head>
<title>test</title>
<style>
.main{
width:97%;
border:1px solid #000;
height:100px;
padding:1%;
}
.subone{
width:30%;
border:1px solid #000;
float:left;
height:100px;
margin-right:2%;
}
.subtwo{
width:67%;
border:1px solid #000;
float:left;
height:100px;
}
</style>
</head>
<body>
<div class="main">
<div class="subone">
</div>
<div class="subtwo">
</div>
</div>
</body>
</html>

I have created you a fluid layout, with your divs. You do not need to use media queries.
And also to use
vertical-align:middle;
you must put
display:table;
on the parent div and you must not float the divs inside.
You can check this example

will it be helpful???
use diplay:table; for parent and display:table-cell for childs..decalare parents width in percentage with overflow:hidden;
HTML::
<div class="parent">
<div class="first"></div>
<div class="second"></div>
</div>
CSS ::
.parent{
display:table;
width:80%;
border-spacing:4px;
border:2px solid black;
overflow:hidden;
}
.first{
text-align:center;
display:table-cell;
border:2px solid black;
width:100px;
height:200px;
}
.second{
text-align:center;
display:table-cell;
border:2px solid black;
height:200px;
}
FIDDLE

Javascripts pop-up box position

I am trying to implement a javascript pop-up box, but I am not sure how to fix the position of the pop-up window. Please check the below fiddle. When I click on the button, the box somehow appears in the middle of the page. Is there a way to make it appears right under my button?
http://jsfiddle.net/kf9mS/
<html lang="en" dir="ltr">
<head>
<style type="text/css">
.popup{
position:relative;
top:0px;
left:0px;
margin:0px auto;
width:200px;
height:150px;
font-family:verdana;
font-size:13px;
padding:10px;
background-color:rgb(240,240,240);
border:2px solid grey;
z-index:100000000000000000;
display:none
}
.cancel{
display:relative;
cursor:pointer;
margin:0;
float:right;
height:10px;
width:14px;
padding:0 0 5px 0;
background-color:red;
text-align:center;
font-weight:bold;
font-size:11px;
color:white;
border-radius:3px;
z-index:100000000000000000;
}
.cancel:hover{
background:rgb(255,50,50);
}
</style>
</head>
<body>
<button onClick="openPopup();">click here</button>
<div id="test" class="popup">
This is a test message
<div class="cancel" onclick="closePopup();"></div>
</div>
</body>
</html>
and
function openPopup() {
document.getElementById('test').style.display = 'block';
}
function closePopup() {
document.getElementById('test').style.display = 'none';
}
(forked from javascript onclick create(element) div viz popup box)
Thanks!

Remove margin: 0 auto property. Because It is enforcing the element to be in center.
Working Fiddle

In your CSS popup make position: absolute; and remove top and left property
so your popup would become
.popup{
position:absolute;
margin:0px auto;
width:200px;
height:150px;
font-family:verdana;
font-size:13px;
padding:10px;
background-color:rgb(240,240,240);
border:2px solid grey;
z-index:100000000000000000;
display:none
}
Rest all is fine

How to replace a div container with javascript

I must have a little design in javascript.
I have a menu with 5 entrys and only 1 HTML-page.
So I will have a content-div and enabled and disabled different static content in it, each menu-entry is another content.
I tried with 5 divs and disable 4 of them and enable 1, but the element under each other means every div is like a - enabled or not, so the "content" is moving then.
Hope its understandable.
Here is the code so far:
<html><head><title>Des Einsame-Katerchen's kleine Homepage</title>
<style type="text/css">
a:link { font-weight:bold; color:blue; text-decoration:none; }
a:visited { font-weight:bold; color:blue; text-decoration:none; }
a:focus { font-weight:bold; color:blue; text-decoration:none; }
a:hover { font-weight:bold; color:blue; text-decoration:line-through; }
a:active { font-weight:bold; color:blue; text-decoration:none; }
h1:focus { background-color:red; }
h1:hover { background-color:silver; }
h1:active { background-color:green; }
</style>
<script>
function an(id)
{
document.getElementById('start').style.visibility = 'hidden';
document.getElementById('start').style.height = '0px';
document.getElementById('me').style.visibility = 'hidden';
document.getElementById('me').style.height = '0px';
document.getElementById('rpg').style.visibility = 'hidden';
document.getElementById('rpg').style.height = '0px';
document.getElementById('musik').style.visibility = 'hidden';
document.getElementById('musik').style.height = '0px';
document.getElementById('screens').style.visibility = 'hidden';
document.getElementById('screens').style.height = '0px';
document.getElementById(id).style.visibility = 'visible';
document.getElementById(id).style.height = '500px';
}
</script>
</head>
<body style=" " >
<div style="width=100%; text-align:center; border: 1px red solid; height:40px;">
<div style="float:left; width:100px;"><a href="#" OnClick="an('start')" >Startseite</a></div>
<div style="float:left; width:100px;"><a href="#" OnClick="an('me')" >Über mich</a></div>
<div style="float:left; width:100px;"><a href="#" OnClick="an('rpg')" >RPG-Chars</a></div>
<div style="float:left; width:100px;"><a href="#" OnClick="an('musik')" >Musik</a></div>
<div style="float:left; width:150px;"><a href="#" OnClick="an('screens')" >Knuddels-Screens</a></div>
</div>
<br>
<div id="start" style="border:1px red solid; width:500px; height:500px; overflow: visible; " >
a
</div>
<div id="me" style="border:1px red solid; width:500px; height:0px; overflow: visible; visibility: hidden; " >
b
</div>
<div id="rpg" style="border:1px red solid; width:500px; height:0px; overflow: visible; visibility: hidden; " >
c
</div>
<div id="musik" style="border:1px red solid; width:500px; height:0px; overflow: visible; visibility: hidden; " >
d
</div>
<div id="screens" style="border:1px red solid; width:500px; height:0px; overflow: visible; visibility: hidden; " >
e
</div>
</body>

Try
style.display = 'none';
It will stop affecting other elements place and layouting.

If you haven't already, I would recommend checking out jQuery for DOM manipulation: http://jquery.com/. In your case, the html() method, http://api.jquery.com/html/, or the hide() method, http://api.jquery.com/hide/.
Good luck!

Take a look at Tabtastic for a decent implementation of this.