Question

I want to change the used CSS File (<link href="..." />) dynamically using only javascript and to save changes in cookies.

This is a jQuery version that does what I want (ref), but how can I do this in javascript?

if($.cookie("css")) {
    $("link").attr("href",$.cookie("css"));
}
$(document).ready(function() {
    $("#nav li a").click(function() {
        $("link").attr("href",$(this).attr('rel'));
        $.cookie("css",$(this).attr('rel'), {expires: 365, path: '/'});
        return false;
    });
});

Thank you in advance.

Answer 1

maybe this could help you..

(function() {
    var e = document.createElement('link'); 
    e.href = document.location.protocol + '//example.com/file.css';
    e.type = 'text/css';
    e.rel = 'stylesheet';
    e.media = 'screen';
    document.getElementsByTagName('head')[0].appendChild(e);      
}());

---

Edit, full JavaScript without jQuery

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}

document.addEventListener('DOMContentLoaded',function(){

    if(readCookie('css')){
        var e = document.getElementById('test-css'); // <link href="..." id="test-css"/>
        e.href = readCookie('css'); 
    }

    var element = document.getElementById('change-css'); // <a herf="#" id="change-css" rel="file.css">Click Here</a>
    element.addEventListener('click', function (event) { 
        var e = document.getElementById('test-css');
        e.href = this.rel;
        if(readCookie('css')){  
            eraseCookie('css');     
        }
        createCookie('css',this.rel,365); 
        event.preventDefault(); 
    }, false);
})