Aug 27

JavaScript Cookie Utility

javascript cookie utility functions

Today once again, I had to write some JavaScript to fix some backend bugs... I love how some backend devs feel everything can and should be fixed in JavaScript :-/

Basically, I had to create, read and update cookies based on the products the user is browsing. So I created this little utility to do the job:

var CookieUtil = {
  createCookie:function(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=/";
  },
  readCookie:function(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;
  },
  eraseCookie:function(name) {
    CookieUtil.createCookie(name,"",-1);
  }
};

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