JS detect if mobile and set condition

Question

I have function which is determining width of my timeline. I want to set width for desktop and mobile devices separately. How can I write them that if desktop so use this code else if mobile, use another code?

If(mobile) { use js function for mobile } else { use js function for desktop }

Here is js fucntion for desktop

 function setTimelineWidth(timelineComponents, width) {
//Line 3 is set width 100%
   totalWidth = $(window).width((timelineComponents['timelineDates'].length * 100));
   //}
  timelineComponents['eventsWrapper'].css('width', totalWidth+'px');
  updateFilling(timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents['fillingLine'], totalWidth);
  updateTimelinePosition('next', timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents);
 
  return totalWidth;
 }

And here is js function for mobile width

 function setTimelineWidth(timelineComponents, width) {
  var timeSpan = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][timelineComponents['timelineDates'].length-1]),
   timeSpanNorm = timeSpan/timelineComponents['eventsMinLapse'],
   timeSpanNorm = Math.round(timeSpanNorm) + 4,
   totalWidth = timeSpanNorm*width;
  timelineComponents['eventsWrapper'].css('width', totalWidth+'px');
  updateFilling(timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents['fillingLine'], totalWidth);
  updateTimelinePosition('next', timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents);
 
  return totalWidth;
 }

Answer 1

  if(typeof window !== 'undefined'){
        var ua = 'navigator' in window && 'userAgent' in navigator &&
            navigator.userAgent.toLowerCase() || '';
    }     
   var judge = {
            isMobile: function () {
                        return !!ua.match(/(iPhone|iPod|android|ios|iPad|windows 
            phone|tablet)/i);
                    },
                    isPc: function () {
                        return !judge.isMobile();
                    }
        }           

        if(judge.isMobile()){
        //mobile
        }else(judge.isPc()){
        //pc
        }

plus,I also wrote an NPM packages for judging,https://github.com/hawx1993/judge

Answer 2

Change your code to this

        var setTimelineWidth;//this is going to be your function based on device
        function IsMobile() {
          var Uagent = navigator.userAgent||navigator.vendor||window.opera;
            return(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino|android|ipad|playbook|silk/i.test(Uagent)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(Uagent.substr(0,4))); 
        };
        if (IsMobile()) 
        {
          setTimelineWidth = function(timelineComponents, width) {
            //Line 3 is set width 100%
            totalWidth = $(window).width((timelineComponents['timelineDates'].length * 100));
            //}
            timelineComponents['eventsWrapper'].css('width', totalWidth + 'px');
            updateFilling(timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents['fillingLine'], totalWidth);
            updateTimelinePosition('next', timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents);

            return totalWidth;
          }
        } 
        else 
        {
          setTimelineWidth = function(timelineComponents, width) {
            var timeSpan = daydiff(timelineComponents['timelineDates'][0], timelineComponents['timelineDates'][timelineComponents['timelineDates'].length - 1]),
              timeSpanNorm = timeSpan / timelineComponents['eventsMinLapse'],
              timeSpanNorm = Math.round(timeSpanNorm) + 3,
              //totalWidth = (timelineComponents['timelineDates'].length * 100)
              totalWidth = $(window).width((timelineComponents['timelineDates'].length * 100));
            timelineComponents['eventsWrapper'].css('width', totalWidth + 'px');
            updateFilling(timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents['fillingLine'], totalWidth);
            updateTimelinePosition('next', timelineComponents['eventsWrapper'].find('a.selected'), timelineComponents);

            return totalWidth;
          }
        }