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CSS - Wikipedia
Find centralized, trusted content thesis custom stylesheet collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. The idea is that I have a variable that I replace when the site is run to generate the right style-sheet. Not in the traditional sense, but you can use classes for this, if you have access to the HTML. Consider this:.
Then there are CSS preprocessors like Sass. You can use conditionals there, which'd look like this:. Disadvantages are, that you're bound to pre-process your stylesheets, and thesis custom stylesheet the condition is evaluated at compile time, not run time.
A newer feature of CSS proper are custom properties a. CSS variables. They thesis custom stylesheet evaluated at run time in browsers supporting them. Finally, you can preprocess your stylesheet with your favourite server-side language. If you're using PHP, serve a style. php file, that looks something like this:. In this case, you will however have a performance impact, since caching such thesis custom stylesheet stylesheet will be difficult.
I am surprised that nobody has mentioned CSS thesis custom stylesheet, which are also a sort-of conditionals in CSS, thesis custom stylesheet. You can do some pretty advanced things with this, without a single line of JavaScript. You can use calc in combination with var to sort of mimic conditionals:, thesis custom stylesheet. One of the reasons why CSS sucks so much is exactly that it doesn't have conditional syntax.
CSS is per se completely unusable in the modern web stack. Use SASS for just a little while and you'll know why I say that. SASS has conditional syntax and a LOT of other advantages over primitive CSS too. But nobody keeps you from using Javascript to alter the DOM or assigning classes dynamically or even concatenating styles in your respective programming language. I've written a article regarding the below unique method in CSS-Tricks which goes into futher detail.
Any property which is numerical in its essence is easy target for this method, but properties with text values are. All 3 are governed by two Boolean variables bool and its opposite notBool. setProperty '--width', thesis custom stylesheet, Math. round Math. This method is so cool because it is so easy to implement and also to understand. it is based on animation step function. Since bool can be easily calculated as either 0 or 1this value can be used in the step!
I've found a Chrome bug which I have reported that can affect this method in some situations where specific type of calculations is necessary, but there's a way around it, thesis custom stylesheet. If by a condition and variable you mean a mechanism to distribute a change of some value to the whole document, thesis custom stylesheet, or under a scope of some element, then this is how to do it:. menuItem { background-position : px 8px; background-color: black; } body.
This way, you distribute the impact of the variable throughout the CSS thesis custom stylesheet. This is similar to what amichai and SeReGa propose, but more versatile. Another such trick is to distribute the ID of some active item throughout the document, e. again when highlighting a menu: Freemarker syntax used. Sure,this is only practical with a limited set of items, like categories or states, and not unlimited sets like e-shop goods, otherwise the generated CSS would be too big.
But it is especially convenient when generating static offline documents. Set the server up to parse css files as PHP and then define the variable variable with a simple PHP statement. Alternatively, you can use javascript function to alter the background-position property of an thesis custom stylesheet. Yet another option based on whether you want that if statement to be dynamically evaluated or not is to use the C preprocessor, as described here.
getElementById "MyElement". active{ background-position : px 8px; background-color: black; }. Add the condition value as a class to the container div. Now you can use the container class as a global variable for all elements in the div using a nested selector, without adding the class to each element.
CSS has a feature: Conditional Rules. This feature of CSS is applied based on a specific condition. Conditional Rules are:. Yes, old thread. But it turned up on top of a Google-search so others might be interested as well.
I haven't tested this across browsers etc, thesis custom stylesheet. but it should work. This will get you started:.
If you're open to using jquery, you can set conditional statements using javascript within the html:. This will change the text color of, thesis custom stylesheet.
class to green if the value of Variable is greater than 0. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 12 years, 2 months ago. Active 5 months ago. Viewed k times. I would like to use conditions in my CSS. I want it so that according to this variable the style-sheet changes! It looks like: [if {var} eq 2 ] background-position : px 8px; [else] background-position : 4px 8px; Can this be done?
How do you do this? css stylesheet conditional-statements. edited Sep 19 '16 at Matthew Strawbridge asked Thesis custom stylesheet 15 '09 at Haim Evgi Haim Evgi k 43 43 gold badges silver badges bronze badges. What the heck are thesis custom stylesheet trying to do that would require CSS conditionals? Add a comment.
Active Oldest Votes. normal { background-position : px 8px; } p. active { background-position : 4px 8px; } That's the CSS way to do it. With them you could do something along the line: :root { --main-bg-color: brown; }. one { background-color: var --main-bg-color ; }, thesis custom stylesheet. two { background-color: black; } Finally, you can preprocess your stylesheet with your favourite server-side language. edited Mar 29 '17 at Chris Stillwell 9, 9 9 gold badges 67 67 silver badges 68 68 bronze badges.
answered Jul 15 '09 at Boldewyn Boldewyn It's not the way it's supposed to work. In regards to what deceze said, that doesn't mean you can't have a dynamically thesis custom stylesheet website. The styles sheets can remain the static, and you can change element classes using javascript with or without jquery or PHP that way the elements styling can change. and, what about if you want to stylize scrollbars? you can't find webkit-scrollbar-button in html — Jerry. Um, yes? What about it?
Sass, thesis custom stylesheet, CSS variables, and serverside processing do not depend on the HTML. Or am I missing something here? Some pseudo-classes: :active - Is the element being clicked? This allows for conditional styling through the use of a checkbox!
Improve your CSS by taking HSL and Custom Props to the next level
, time: 8:08stylesheet - Can you use if/else conditions in CSS? - Stack Overflow
Sep 15, · The ATC's mission is to further Bentley’s leadership in and strategic focus on the integration of business and technology. We enrich scholarly initiatives and student learning by empowering faculty with state-of-the-art academic, information, and communication resources We would like to show you a description here but the site won’t allow blogger.com more Syntax. CSS has a simple syntax and uses a number of English keywords to specify the names of various style properties.. A style sheet consists of a list of blogger.com rule or rule-set consists of one or more selectors, and a declaration block.. Selector. In CSS, selectors declare which part of the markup a style applies to by matching tags and attributes in the markup itself
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