Can I Modify CSS Class Rules Dynamically with jQuery?

How to Change CSS Class Rules Dynamically with jQuery

Question:

• How can I modify specific CSS rules for a class using jQuery, without adding inline styles?
• Is it possible to save these changes persists in a file?

Answer:

While jQuery doesn't directly provide a method to modify CSS rules, there are two approaches to accomplish your tasks:

a. Modifying CSS Rules on the Fly:

• Using JavaScript's document.styleSheets property, you can access the stylesheet rules.
• Iterate through the rules and locate the rule associated with your target class.
• Use the rules[j].style property to change the desired CSS property, such as "font-size".
• Example:

<code class="javascript">var ss = document.styleSheets;

for (var i = 0; i <p><strong>b. Saving Style Changes to a File:</strong></p>
<ul>
<li>This process requires server-side implementation.</li>
<li>Read the modified CSS declarations using the document.styleSheets property as explained above.</li>
<li>Use JavaScript to build a string containing the updated CSS.</li>
<li>Send an Ajax POST request to the server with the CSS string as payload.</li>
<li>On the server-side, save the modified CSS to a file for permanent storage.</li>
</ul>
<p><strong>References:</strong></p>
<ul>
<li>[document.styleSheets (Mozilla)](https://developer.mozilla.org/en-US/docs/Web/API/Document/styleSheets)</li>
<li>[CssRule object (Mozilla)](https://developer.mozilla.org/en-US/docs/Web/API/CSSRule)</li>
<li>[document.styleSheets (MSDN)](https://docs.microsoft.com/en-us/previous-versions/ie8/cc330629(v=vs.85))</li>
<li>[CssRule object (MSDN)](https://docs.microsoft.com/en-us/previous-versions/ie8/cc330627(v=vs.85))</li>
</ul></code>

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