CSS Selector not exists - css

http://comtest.pointstarter.info/ is the site. In the top bar, The div named header-social is applying the css rule #wrapper .header-social * and shows that its coming from the site URL instead of any Css files attached. I want to remove the Important from this rule. Any one have idea?

The CSS rule comes from an code block in the head section of the page. Starting from the end of the block is the second tag that you see.
Because it has an important word in the rule, yo change it you should use javascript to change the change the rule from javascript code.
If you can add JS, tell me and I will show you the piece of code.
[UPDATED]
Hey!
You have to add this piece of code to your CSS:
#myHeader .header-social {
background-color: #FF0000 !important;
height: 50px
}
and this piece of code to your JS file
var elements = document.getElementsByClassName('header-v2');
for(var i = 0, length = elements.length; i < length; i++) {
elements[i].id = 'myHeader';
}
The trick is that we have added a more restrictive/specific rule than the other one, so although there is an "important" word, our rule wins. To create a more specific rule we have had to add a new #id via JS.
I have tested and it works. Hope it helps you!
Rafa

Related

CSS hierarchy to allow a class to trigger styles to all siblings without that class

First - sorry for the title - if you have a better suggestion as to what it should be named then please let me know.
I'm not sure if this is possible in the CSS hierarchy.
I have multiple elements and each one can have a .show class added to it, to show the the content.
I'd like to set a rule, so if the .show class has been added - any of the same element without (.show) it are then hidden.
My current not working attempt is to use:
.team_item {
display: grid;
&.show {
&:not(.show){
display: none;
}
}
So the logic would be:
element - should be visible
element + show class - element & inner content visible
element + show class - all elements without the show class should be hidden (display: none).
But I think I am trying to go back up the hierarchy in the CSS (scss).
Any help would be great.
Note: I'm fully aware that I can write JS to tackle this issue but was looking for a css (scss) solution.
I believe it needs to be along those lines:
$team-item-display:'block';
.wrapper {
#function hideElement() {
$team-item-display:'none';
#return 0;
}
&.show{
hideElement()
}
&:not(.show){
display:$team-item-display;
}
}
The direction of the solution is in calling a function that will set a different value of a variable that elements with no .show class use.
I havent tested the code. Hopefully it works.

Reading class names in a stylesheet

I have an HTML document that uses multiple style tags. One of those styles has the following content
<style id='pstyle'>
.p0010, .p0016, .p0022, .p0028, .p0032,
.p0034, .p0038, .p0042, .p0044, .p0046,
.p0048, .p0050, .p0052, .p0054, .p0056,
{
max-width:100%;
background-size:100%;
background-image: url('sprites.png');
}
</style>
document.styleSheets allows me to access the full set of stylesheets used by the document. From there - once I have grabbed the right stylesheet - I can use the cssRules array attribute to access the selectorText attribute of each contained style. However, I have been unable to figure out how to find the "right" style sheet. Whilst I can give the stylesheet an id this does not turn up as an attribute of the document.styleSheets[n] object.
I do a great deal of DOM manipulation but it is mostly with the visual elements in the document. I'd be much obliged to anyone who can tell me how I go about identifying the "right" stylesheet
A plain English version of the task
a. Find the style element - bearing in mind that there will be others - with the id pstyle
b. Read the class names defined therein and do whatever
I'm not sure to understand if you want to get the stylesheet associated with the <style> element, or if you want to retrieve the element from the stylesheet.
So here you'll get both :
// from the element
console.log(pstyle.sheet === document.styleSheets[2]);
// from the stylesheet
console.log(document.styleSheets[2].ownerNode === pstyle);
<style id='pstyle'>
</style>
note that in the snippet it's [2] because stacksnippet does inject stylesheets
And now to get the cssRules and selectorText, you just have to read it from the selected styleSheet:
var pstyle = document.getElementById('pstyle');
// from the element
console.log(pstyle.sheet.cssRules[0].selectorText);
// from the stylesheets
for(var sheet of document.styleSheets){
if(sheet.ownerNode === pstyle){
console.log(sheet.cssRules[0].selectorText);
}
}
<style id='pstyle'>
.p0010, .p0016, .p0022, .p0028, .p0032,
.p0034, .p0038, .p0042, .p0044, .p0046,
.p0048, .p0050, .p0052, .p0054, .p0056
{
max-width:100%;
background-size:100%;
background-image: url('sprites.png');
}
</style>

Change color for any element on page

How do I achieve something like this:
*:hover{
background-color:lightblue;
}
I am trying to change background color of any element on the page when hovering on the element. Not sure why it doesnt work.
It works fine http://jsfiddle.net/mendesjuan/9pta8vbz/
The problem is that it's highlighting the entire body since the mouse is over the body, so you don't see highlighting on children any differently.
The following example should clarify it http://jsfiddle.net/mendesjuan/9pta8vbz/1/ It will highlight items inside the body
CSS
body *:hover{
background-color:lightblue;
}
HTML
<p>1 <span>inside</span></p><p>2</p><p>3</p>
It will highlight the paragraphs, but the span will behave the same way since the paragraph will also be highlighted
What you are doing cannot be done with CSS alone, you can use JS to add a CSS class to the element that the mouse is over http://jsfiddle.net/mendesjuan/9pta8vbz/2/
CSS
.highlight {
background-color:lightblue;
}
JavaScript
// This is a simplified version that doesn't take care of edge cases
// known bugs: should use addEventListener, should not wipe out existing `className`,
// e.target is not 100% cross browser, but those are other topics
document.onmouseover = function(e) {
e.target.className = 'highlight';
}
document.onmouseout = function(e) {
e.target.className = '';
}

How can I prevent CSS from affecting certain element?

I am writing a GreaseMonkey script that sometimes creates a modal dialog – something like
<div id="dialog">
Foo
</div>
. But what can I do if the site has something like
#dialog {
display: none !important;
}
? Or maybe the owner of some site is paranoid and has something like
div {
display: none !important;
}
div.trusted {
display: block !important;
}
because he doesn't want people like me adding untrusted content to his page. How can I prevent those styles from hiding my dialog?
My script runs on all pages, so I can't adapt my code to each case.
Is there a way to sandbox my dialog?
Actually a very interessting problem, here is another approach:
adding an iframe and modifying it creates a seperate css space for you (your sandbox)
look at this jsfiddle example: http://jsfiddle.net/ZpC3R/2/
var ele = document.createElement("iframe");
ele.id = "dialog";
ele.src = 'javascript:false;';
ele.style.height = "100px";
ele.style.width = "300px";
ele.style.setProperty("display", "block", "important");
document.getElementById("dialog").onload = function() {
var d = document.getElementById("dialog").contentWindow.document;
// ... do your stuff within the iframe
};
this seems to work without problem in firefox.
now you only have to make sure that the iframe is untouched, you can do this they way i described in my 1. answer
just create the div like this:
var ele = document.createElement("div");
ele.style.setProperty("display", "block", "important");
that should overwrite all other styles afaik.
look here, it seems to work: http://jsfiddle.net/ZpC3R/

CSS if/else statement for counting list items

I need an if/else statement for my CSS which can count list items. Would this be possible?
Basically I want to say, if there are less than 10 list items, the UL container should be 200px wide, and it there are more than 10 list items, it should be 400px wide. Something like that.
Can it be done?
I would appreciate a working demo on jsFiddle, both so I can see working code, and for anyone who looks here in the future so they can see a working example and how to do it :)
CSS only does styles, but not dynamically (unless with assistance of JS). you can use the following JS snippet for the task. just to make sure, load this at the very last, just before the </body>
<script type="text/javascript">
(function resize() {
//get all lists with selected name
var lists = document.getElementsByClassName('myList');
//loop through all gathered lists
for (i = 0; i < lists.length; i++) {
//shorthand elements for easy use
var list = lists[i];
var items = list.getElementsByTagName('li');
//append class names
list.className = (items.length < 10) ? 'myList less' : 'myList more';
}
}())​
</script>
.less{
width:200px;
}
.more{
width:400px;
}​
CSS has no if else statements. You can do this easily with jQuery. Another option would be to use LESS or SCSS.
Short answer: no. CSS offers no conditional support.
Long answer: you need to use javascript or a server side language to either add a class when there are more than 10 items (or elements) in the list, or in the case of javascript, directly manipulate the style after it's loaded.
That doesn't sound possible for CSS. There are no logical if/else statements in the CSS spec. Your next best bet would probably be javascript. You could achieve this with jQuery with the following code:
if($('ul#target-list li').length < 10) {
$('ul#target-list').css('width', 200);
}
else {
$('ul#target-list').css('width', 400);
}
Pure CSS3 Solution
If you only want to support CSS3, then this does what you need:
li {
width: 200px;
}
li:nth-last-child(n+11),
li:nth-last-child(n+11) ~ li {
width: 400px;
}
But you will need to make the ul either display: inline-block or float it so that the width is controlled by the li elements themselves. This may require you to wrap the ul (display: inline-block) in a div so that it still is a block element in the flow of the page if you need it so.

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