CSS newbie here wondering if this is possible. If I have something like the code below, is it possible to override just the section that has the class itemtile AND data-id of ABC123? My goal is to hide that entire section from being displayed. I've reviewed some past comments about specifity but when it comes to wanting both values to exist I get a bit lost. I'm mucking with trying to override code for a site that is not mine using a personal plugin.
<div id="itemgrid" class="section">
<div class="itemtile" data-id="ABC123">
<div class="itemcontent"></div>
</div>
<div class="itemtile" data-id="DEF123">
<div class="itemcontent"></div>
</div>
</div>
I did some code examination in the debugger and can make the page do what I want by removing the div element for the data-id's I want to hide just not sure how to do it in CSS. I'm not asking for help on creating the plugin just if and how I can address an element that specifically.
You can accomplish this with JavaScript
let class = document.getElementsByClassName("itemtile");
for(let i = 0; i < class.length; i++){
if(class[i].dataset.id == 'ABC123'){
class[i].style.display = "none";
break;
}
}
Alternatively, if you want to do this using CSS, you can do it like so:
.itemtile[data-id='ABC123'] {
display: none;
}
That should do it!
You can override easily by adding style="" after your div
for example
<div style="" id="itemgrid" class="section">
In other words, I need to generate css classes and inject them somehow into the page.
I need to modify the classes at runtime in C#.
Why?
Let's say my razor component renders thousands of elements and I need to change width of all those elements.
Rather than modifying style attribute on many elements I would like to just modify single css rule.
JS interop is acceptable.
First, avoid placing style tags inside components. Each time the component is rendered, so is the style tag. In addition, it makes it difficult for other developers to find your CSS if it is scattered all over the app in components.
I don't normally suggest using inline styles, but CSS variables have really changed my outlook on this. CSS property variables allow you to dynamically pass values to your CSS at runtime using the style attribute.
#* This belongs in app.css *#
<style>
:root {
--my-width: 100px;
}
.example {
background-color: #ccc;
width: var(--my-width);
}
</style>
#* ^ This belongs in app.css *#
<h1>Hello, Blazor REPL!</h1>
<label>Width</label>
<input #bind-value="#width" />
<p class="example" style="--my-width: #width">My Width is #width</p>
#code {
string width = "100px" ;
}
You can see an example of this running in the browser here. https://blazorrepl.com/repl/cFOdkmPA10gU73Hl18
I had a similar thing I needed to edit in Blazor. Long story short is MatBlazor Tabs adds a style="pointer-events: auto;" that I needed to disable when loading data.
https://www.matblazor.com/Tab
I solved it like this:
index.html:
window.ChangeMatBlazorTabPointerEvents = (loadData) => {
var allTabs = document.querySelectorAll('.mdc-tab__content');
allTabs.forEach((tab) => {
if (loadData) {
tab.style.pointerEvents = 'none';
}
else {
tab.style.pointerEvents = 'auto';
}
});
}
Blazor (razor) file::
#inject IJSRuntime JSRuntime
await JSRuntime.InvokeVoidAsync("ChangeMatBlazorTabPointerEvents", loadData);
Example why I had to do it:
<MatTab Label="Threats and Countermeasures" Style="pointer-events: inherit;">
Renders this:
<div class="matBlazor_theme_12345678-1234-1234-1234-123456789012 mat-tab-label mdc-tab" style="pointer-events: inherit;" role="tab" tabindex="0" id="matBlazor_id_82bcf7fc-5f04-48a0-aff0-d24dcc0b0ac3" _bl_92=""><!--!-->
<span class="mdc-tab__content" style="pointer-events: auto;"><!--!-->
<span class="mdc-tab__text-label">Threats and Countermeasures</span><!--!-->
</span><!--!-->
<span class="mdc-tab-indicator "><!--!-->
<span class="mdc-tab-indicator__content mdc-tab-indicator__content--underline"></span>
</span><!--!-->
<span class="mdc-tab__ripple"></span>
</div>
Does not currently work due to <span class="mdc-tab__content" style="pointer-events: auto;">
The following code does not work either since the tab will still have style="pointer-events: auto;"
<MatTab>
<LabelContent>
<span style="#((loadData ? "pointer-events: none;" : ""))"> Threats and Countermeasures </span>
</LabelContent>
<ChildContent>
Content
</ChildContent>
</MatTab>
With the use of namespace, i'm trying to make a div-element in Javascript where if you hover over the div it'll change color and change back when not hovering over it. Please help!
Is this what you need? There is many ways to do it, I used plain js. The css you put whetever you want.
I don't understand what the namespace means in your situation.
Following are the respective javascript, css and html. But things like this you can google and find the parts that you need.
function changeColors(){
if(document.getElementById("myElement").classList.contains('class1')){
document.getElementById("myElement").classList.remove('class1');
document.getElementById("myElement").classList.add('class2');
}else{
document.getElementById("myElement").classList.remove('class2');
document.getElementById("myElement").classList.add('class1');
}
}
.class1{
color:red;
}
.class2{
color:blue;
}
<div>
<h3 id="myElement" class="class1" onmouseover="changeColors()"
onmouseout="changeColors()">
Hello
</h3>
</div>
I have some colors that when clicked I want to change the value of some css.
I want to change the color css value of this css :
article .teleprompter p
{
padding-bottom: 15px;
margin-bottom: 15px;
color:white;
}
The html:
<div class="swatch concrete" onClick="javascript:changeBTC('#95a5a6')"></div>
This is the java script I use for a similar function . This one changes the background color:
<script>
function changeBGC(color)
{
document.getElementById("teleprompter").style.backgroundColor = color;
}
</script>
Would it make a difference in JavaScript code if the css was in a separate style sheet?
don't add javascript: in onclick code - the borwser already knows it is javascript! You only need to add javascript: to an <a href> to tell the browser it is script rather than a URL:
So you just need this:
<div class="swatch concrete" onClick="changeBTC('#95a5a6')"></div>
or you could do this if you wanted to use a link:
<a class="swatch concrete" href="javascript:changeBTC('#95a5a6')"></a>
Your function is changeBGC, but you're executing changeBTC. Replace changeBTC('#95a5a6') with changeBGC('#95a5a6')
It will not make a difference if the css was in a seperate file as long as you are refering the css file in your html page.
Moreover in css you are refering the object as class in css (.teleprompter) and in javascript you are refering the object with id (getElementById). So either use id in both the places or class in both the places
Is it possible to wrap an <a> tag around <div>s like so:
<a href=etc etc>
<div class="layout">
<div class="title">
Video Type
<div class="description">Video description</div>
</div>
</div>
</a>
Eclipse is telling me the div's are in the wrong place?
If this is not allowed. How can I make the entire 'layout' class become a link?
That structure would be valid in HTML5 since in HTML5 anchors can wrap almost any element except for other anchors and form controls. Most browsers nowadays have support for this and will parse the code in the question as valid HTML. The answer below was written in 2011, and may be useful if you're supporting legacy browsers (*cough* Internet Explorer *cough*).
Older browsers without HTML5 parsers (like, say, Firefox 3.6) will still get confused over that, and possibly mess up the DOM structure.
Three options for HTML4 - use all inline elements:
<a href=etc etc>
<span class="layout">
<span class="title">
Video Type
<span class="description">Video description</span>
</span>
</span>
</a>
Then style with display: block
Use JavaScript and :hover:
<div class="layout">
<div class="title">
Video Type
<div class="description">Video description</div>
</div>
</div>
And (assuming jQuery)
$('.layout').click(function(){
// Do something
}):
And
.layout:hover {
// Hover effect
}
Or lastly use absolute positioning to place an a anchor with CSS to cover the whole of .layout
<div class="layout">
<div class="title">
Video Type
<div class="description">Video description</div>
</div>
<a class="more_link" href="somewhere">More information</a>
</div>
And CSS:
.layout {
position: relative;
}
.layout .more_link {
position: absolute;
display: block;
top: 0;
bottom: 0;
left: 0;
right: 0;
text-indent: -9999px;
z-index: 1000;
}
This won't work with older versions of IE, of course.
While the <a> tag is not allowed to contain <div> element, it is allowed to contain other inline elements such as <span>.
When I encountered the problem i swapped the div tag with a <span>. Since the span tag is an inline element, you need to apply a display:block to the css of your <span> element, in order to make it behave like the <div> block element.
This should be valid xhtml and does not require any javascript.
Here's an example:
<a href="#">
<span style="display:block">
Some content. Maybe some other span elements, or images.
</span>
</a>
Another simple solution - just add an onclick event handler to the div thusly:
<div class="layout" onclick="location.href='somewhere'">
<div class="title">
Video Type
<div class="description">Video description</div>
</div>
</div>
This works great for me but there is one small gotcha. I'm not sure how search engine friendly this is. I fear that google's web crawlers might not find this link so I also tend to include a traditional A HREF link somewhere in the block like this:
<div class="layout" onclick="location.href='destination_url'">
<div class="title">
Video Type
<div class="description">Video description</div>
</div>
This is a link
</div>
Timothy's solution is correct ... instead of wrapping an anchor around a div ... you simply give layout to the anchor element with display:block and add the size and width of the anchor ...
.div_class { width: 100px; height: 100px; }
.div_class a { width: 100px; height: 100px; display: block; }
<div class='div_class'></div>
HTML provides two general elements, where div is a natural block element, and span is a natural inline element. All other elements are similarly assigned to be a natural block or inline.
Now, while both can be made by css display to be any of inline, inline-block or block, they are still treated for enclosure purposes as their natural selves, hence the warning messages. Leopards and spots sort of thing.
However, css is only meant to be for making what an element looks like (presentation), but not actually be like (functionality), so it doesn't change an element's basic nature, though that gets very fuzzy in practice. A span made block becomes a bully that kicks everything else off the line, which is very un-inline sort of behaviour.
So, to mitigate against possible conflicts between their natural and css-induced behaviours, it is better to allow:
div or any natural block tag to only ever be block or inline-block.
span or any natural inline tag to only ever be inline or inline-block.
This will also mitigate against tending to build page structures that will likely end up churning out error and warning messages.
Basically, NEVER embed a natural block tag inside a natural inline tag, at any depth.
Why there is a really a distinction is perhaps due to a simplistic idea of what HTML was going to be used for when it was first dreamed up.
Certainly, framework makers got around a lot of these what-to-embed-where problems by just using myriads of divs everywhere, and 'divitis' was born, and still alive and well in every framework. Just have to press F12 in a browser on almost any commercial web page and drill down through a dozen divs. This very page has 15 unbroken levels of divs.
It is not hard to see why just settling on divs made sense. For example, a p tag may have a bunch of links to various sites, and that is ok because inline links are allowed in a block p. However, if not wanting to have query variables visible in those urls, then buttons are required. If only one, then the p can be put inside a form, as a p cannot contain a form.
The formaction attribute on a button can be used to target a url other than the form default, but it still does not allow independent forms, each with their own set of hidden inputs. A button can use the form attribute to use it with a form that isn't an ancestor, but it can get messy to keep track of.
For multiple links to different sites to appear as part of one paragraph though, the only way is to use a div instead of the p and then wrap each button in its own form set to inline. Most frameworks have to cope with so much more complex scenarios that nested divs are the only way to go.
It meant that they really only had to manage one tag per purpose and manage it as if it was an isolated environment. So what was meant to be an occasionally-used functional grouping tag became the web's Lego block. And none of them are going to risk breaking their frameworks by converting to HTML5 semantic tags in a hurry. In the end, semantic tags only really work for fairly static content rather than rich interactive sites.
I had tried to create custom solution using jQuery, which would imitate same behavior as a tag does, for parent DIV.
DEMO:
https://jsfiddle.net/kutec/m9vxhcke/
As per W3C standard, you cannot do this:
<div class="boxes">
<a href="http://link1.com" target="_blank">
<div class="box">
<h3>Link with _blank attr</h3>
</div>
</a>
</div>
You must follow this:
<div class="boxes">
<div class="box">
<h3>
Link with _blank attr
</h3>
</div>
</div>
But by following above code, you wouldn't get the whole DIV clickable :).
Correct structure should be something like this, which also allows you to click over the DIV to redirect on the given href value:
<div class="boxes" data-href="http://link1.com" data-target="_blank">
<div class="box">
<h3>
Link with _blank attr
</h3>
</div>
</div>
Simple Solution:
$(function() {
$('.boxes a').each(function(){
var aTag = $(this).attr('href');
$(this).parent().attr('data-href',aTag);
$("[data-href]").click(function() {
window.location.href = $(this).attr("data-href");
return false;
});
})
}(jQuery));
Dynamic Solution:
(function ( $ ) {
$.fn.dataURL = function() {
// variables
var el = $(this);
var aTag = el.find('a');
var aHref;
var aTarget;
// get & set attributes
aTag.each(function() {
var aHref = $(this).attr('href');
$(this).parent().attr('data-href',this);
aTarget = $(this).attr('target');
$(this).parent().attr('data-target',aTarget);
});
// imitation - default attributes' behavior on "data-" attributes
$(el).delegate('[data-href]','click', function() {
var loc = window.location.href;
loc = $(this).attr("data-href");
aTarget = $(this).attr('data-target');
if(aTarget == "_blank"){
window.open(loc);
} else {
window.location = loc;
}
return false;
});
//removing attributes from selector itself
el.removeAttr('data-href');
el.removeAttr('data-target');
// css
$('[data-href]').css('cursor','pointer');
};
}( jQuery ));
Final call:
<script>
$('.boxes').dataURL();
</script>
Hope this would be helpful :)
You would just want to style the "a" tag as display: block;
Eclipse is appropriately telling you that your HTML is not to spec (as a div tag is not allowed in an anchor tag).
But, since you seem to want to be visually making the anchor look like a big-ol-box, then simply style it as such :)
One easy way to make the div a link/clickable is by using html javascript onclick attribute:
<div class="clickable-div" onclick="location.href='#';"><div> ... </div></div>