I am working with multiple divs that have a specific CSS class applied to them.
My goal is to manually increase the pixel value in the top property:
.class { top: 100px; }
div class="class" style="top:+=50px"
Is it possible to achieve this functionality?
It's not possible to achieve this with pure CSS. Utilizing a preprocessor such as LESS or SASS on the server-side is one way to go about it.
The same result can be achieved using jQuery/JavaScript.
var element = $('.element');
var topPosition = element.css('top').substr(0, element.css('top').length - 2);
topPosition += //your value here
element.css('top', topPosition + 'px');
Unfortunately, the method mentioned may not be reliable for all browsers.
Although there is a CSS3 property called calc() that has the potential to achieve this result, it may only work on the latest browsers and support could be inconsistent.
You can find more information about it here:
If you have specific reasons for wanting to accomplish this task, you might consider exploring alternatives like using a CSS Pre-Processor such as LESS or SASS.
What is motivating your desire to do this? There may be a solution that isn't immediately apparent based on the question presented.
To achieve the desired effect, consider using CSS3 transforms. For example:
.element { top: 100px; }
<div class="element" style="transform:translate(0,50px)"
Remember to include all necessary vendor prefixes for cross-browser compatibility:
style="transform:translate(0,50px);-webkit-transform:translate(0,50px);-o-transform:translate(0,50px);-ms-transform:translate(0,50px);-moz-transform:translate(0,50px)"
Unfortunately, achieving this solely with CSS is not possible.
An alternative would be to incorporate server-side code or utilize JavaScript within the browser.
Another option is to explore tools like LESS or SASS, which offer support for variables and basic calculations.
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