Edit fiddle - JSFiddle - Code Playground

HTML

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<html>
<head>
    <title>Style Changer</title>
    <link href="script.css" rel="stylesheet" />
    <link href="sansStyle.css" rel="stylesheet" title="default" />
    <link href="serifStyle.css" rel="alternate stylesheet" title="serif" />
    <script type="text/javascript" src="script.js">
    </script>
</head>
<body>
    <div class="navBar"><p>Change your font:</p>
        <form action="#">
            <input type="button" class="typeBtn" value="Sm Sans" id="default" />&nbsp;&nbsp;
            <input type="button" class="typeBtn2" value="Lg Serif" id="serif" />
        </form>
        <br clear="all" />
    </div>
    <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean lacus elit, volutpat vitae, egestas in, tristique ut, nibh. Donec congue lacinia magna. Duis tortor justo, dapibus vel, vulputate sed, mattis sit amet, leo. Cras purus quam, semper quis, dignissim id, hendrerit eget, ante. Nulla id lacus eget nulla bibendum venenatis. Duis faucibus adipiscing mauris. Integer augue. In vulputate purus eget enim. Nam odio eros, porta vitae, bibendum sit amet, iaculis nec, elit. Cras egestas scelerisque pede. Donec a tellus. Nullam consectetuer fringilla nunc.</p>
    
    <p>Nam varius metus congue ligula. In hac habitasse platea dictumst. In ut ipsum a pede rhoncus convallis. Sed at enim. Integer sed metus quis est egestas vestibulum. Quisque mattis tortor a lorem. Nam diam. Integer consequat lectus. Donec molestie elementum nisl. Donec ligula sapien, volutpat eget, dictum quis, mollis a, odio. Aliquam augue enim, gravida nec, tempor ac, interdum in, urna. Aliquam mauris. Duis massa urna, ultricies id, condimentum ac, gravida nec, dolor. Morbi et est quis enim gravida nonummy. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Mauris nisl quam, tincidunt ultrices, malesuada eget, posuere eu, lectus. Nulla a arcu. Sed consectetuer arcu et velit. Quisque dignissim risus vel elit.</p>
    
    <p>Nunc massa mauris, dictum id, suscipit non, accumsan et, lorem. Suspendisse non lorem quis dui rutrum vestibulum. Quisque mauris. Curabitur auctor nibh non enim. Praesent tempor aliquam ligula. Fusce eu purus. Vivamus ac enim eget urna pulvinar bibendum. Integer porttitor, augue et auctor volutpat, lectus dolor sagittis ipsum, sed posuere lacus pede eget wisi. Proin vel arcu ac velit porttitor pellentesque. Maecenas mattis velit scelerisque tellus. Cras eu tellus quis sapien malesuada porta. Nunc nulla. Nullam dapibus malesuada lorem. Duis eleifend rutrum tellus. In tempor tristique neque. Mauris rhoncus. Aliquam purus.</p> 
    
    <p>Morbi felis quam, placerat sed, gravida a, bibendum a, mauris. Aliquam porta diam. Nam consequat feugiat diam. Fusce luctus, felis ut gravida mattis, ante mi viverra sapien, a vestibulum tellus lectus ut massa. Duis placerat. Aliquam molestie tellus. Suspendisse potenti. Fusce aliquet tellus a lectus. Proin augue diam, sollicitudin eget, hendrerit non, semper at, arcu. Sed suscipit tincidunt nibh. Donec ullamcorper. Nullam faucibus euismod augue. Cras lacinia. Aenean scelerisque, lorem sed gravida varius, nunc tortor gravida odio, sed sollicitudin pede augue ut metus. Maecenas condimentum ipsum et enim. Sed nulla. Ut neque elit, varius a, blandit quis, facilisis sed, velit. Suspendisse aliquam odio sed nibh.</p>
</body>
</html>
​

JavaScript

Module

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window.onload = initStyle;
window.onunload = unloadStyle;
​
function initStyle() {
    var thisCookie = cookieVal("style");
    var title;
    
    if  (thisCookie) {
        title = thisCookie;
    }
    else {
        title = getPreferredStylesheet();
    }
    setActiveStylesheet(title);
    
    var allButtons = document.getElementsByTagName("input");
    for (var i=0; i<allButtons.length; i++) {
        if (allButtons[i].type == "button") {
            allButtons[i].onclick = setActiveStylesheet;
        }
    }
}
​
function unloadStyle() {
    var expireDate = new Date();
    expireDate.setYear(expireDate.getFullYear()+1);
    document.cookie = "style=" + getActiveStylesheet() + ";path=/;expires=" + expireDate.toGMTString();
}
​
function getPreferredStylesheet() {
    var thisLink, relAttribute;
    var linksFound = document.getElementsByTagName("link");
    
    for (var i=0; i<linksFound.length; i++) {
        thisLink = linksFound[i];
        relAttribute = thisLink.getAttribute("rel");
        if (relAttribute.indexOf("style") > -1 && relAttribute.indexOf("alt") == -1 && thisLink.getAttribute("title")) {
             return thisLink.getAttribute("title");
        }
    }
    return "";
}
​
function getActiveStylesheet() {
    var thisLink;
    var linksFound = document.getElementsByTagName("link");
    
    for (var i=0; i<linksFound.length; i++) {
        thisLink = linksFound[i];
        if (thisLink.getAttribute("rel").indexOf("style") > -1 && thisLink.getAttribute("title") && !thisLink.disabled) {
            return thisLink.getAttribute("title");
        }
    }
    return "";
}
​
function setActiveStylesheet(inVal) {
    var thisLink, title;
    var linksFound = document.getElementsByTagName("link");
​
    if (inVal) {
        if (typeof inVal == "string") {
            title = inVal;
        }
        else {
            title = inVal.target.id;
        }
    }
    else {
        title = window.event.srcElement.id;
    }
​
    for (var i=0; i<linksFound.length; i++) {
        thisLink = linksFound[i];
        if (thisLink.getAttribute("rel").indexOf("style") > -1 && thisLink.getAttribute("title")) {
            thisLink.disabled = true;
            if (thisLink.getAttribute("title") == title) {
                thisLink.disabled = false;
            }
        }
    }
}
​
function cookieVal(cookieName) {
    var thisCookie = document.cookie.split("; ");
    for (var i=0; i<thisCookie.length; i++) {
        if (cookieName == thisCookie[i].split("=")[0]) {
            return thisCookie[i].split("=")[1];
        }
    }
    return "";
}
​

CSS

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body {
    margin: 0 20px;
    padding: 0;
    background-color: white;
    color: black;
}
​
div.navBar {
    background-color: #CCC;
    width: 175px;
    position: relative;
    top: -1.0em;
    right: -20px;
    float: right;
    padding: 20px 0 0 20px;
    border-left: 2px groove #999;
    border-bottom: 2px groove #999;
}
​
.typeBtn {
    font: 9px/10px verdana, geneva, arial, helvetica, sans-serif;
}
​
.typeBtn2 {
    font: 14px/15px Times New Roman, Times, serif;
}
​

3035px

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Tailwind CSS

Added Tailwind CSS to the list of precompilers - even though it's really HTML, you can activate it from the dropdown in the CSS panel. Tailwind CSS would be best used with HTML Hot-reload enabled.
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JSFiddle 3.0
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There was an increadible amount of under-the-hood changes for the front-end, we've mostly moved away from pre-processors. The light/dark themes are using a modern light-dark() approach. The refactoring allows for more changes to be made in a spedier manner.
- In the new sidebar you can find our mini-apps (right now the Color Palette Generator)
- System theme follows your OS settings
- CSS Hot-reload - styles update immidietly as you type
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- Results panel color follows the selected theme
- Title and description are now a single field
- Public Profile page is completelty redesigned and can be easily used as your code showcase
- Groups are now Collections and we have big plans for them
- Collections are completely redesigned
- Users can now add groups straight from the editor
Import fiddles as modules

Import fiddle code into other fiddles with Modules and Imports.

JS Modules: import [name] from '@jsfiddle/[username]/[fiddle].js'

CSS Import: @import url('@jsfiddle/[username]/[fiddle].css')

See how this works in this fiddle.
Fiddle listing shows latest version

The fiddle listings (Public, Private, Titled, etc) will now display latest versions instead of the ones saved as Base versions - this was causing more confusion than good, so we decided to change this long-standing behavior.
Evaluate code into the console

Custom Console beta is getting more stable and feature-rich. Just added the ability to evaluate code in the console.

Console

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Use pre-released features

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Private collections and fiddles

Console

Console

Language

Doctype

Language

Extensions

script attribute

Language

Reset CSS

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Use pre-released features

Fiddle collections

Private collections and fiddles

Console

Tabs:

Visual:

Embed snippet Prefer iframe?:

Behavior

General

Console

New Automatically expiring fiddles

Ability to download a fiddle

Your recent fiddles when logged out

Tailwind CSS

Code linting and formatting

JSFiddle 3.0

Import fiddles as modules

Fiddle listing shows latest version

Evaluate code into the console

`script` attribute

Keep JSFiddle running.
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