javascript - function triggers on window width but will not turn off if bigger than set width -

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here have work if window width under 1024 still trigger though set trigger if on 1024

$(function () {      $('#hamburger').click(function () {         $('div.burger_nav').slidetoggle();     });      $(window).resize(function () {         if ($(window).width() < 1024) {             $('.nav_shown').hide();             $('div.footerdiv_2').hide();             $('div.hidden_nav').hide();             $('div.burger_btn').show();             $('#ft').removeclass('footerdiv_3').addclass('footer_img_clear');         } //end of if          else {             $(".nav_shown").show();             $('.footerdiv_2').show();             $('div.burger_btn').hide();             $('#ft').removeclass('footer_img_clear').addclass('footerdiv_3');              $(document).scroll(function () {                 var headershow = $(this).scrolltop();                 if (headershow > 200) {                     $('div.hidden_nav').fadein();                     $(".nav_shown").hide();                 } else {                     $('div.hidden_nav').fadeout();                     $(".nav_shown").show();                 }             });         } //end of else     }); });

it looks want modify document when window reaches breakpoint, in case 1024 pixels. known responsive web design.

instead of updating screen every time on resize, it's useful set flag triggering breakpoint.

$(function() {      $('#hamburger').click(function(){         $('div.burger_nav').slidetoggle();     });      var currentlysmall = false;     function update() {         if ($(window).width() < 1024 && !currentlysmall) {             currentlysmall = true;             console.log('less 1024');              $('.nav_shown').hide();             $('div.footerdiv_2').hide();             $('div.hidden_nav').hide();             $('div.burger_btn').show();             $('#ft').removeclass('footerdiv_3').addclass('footer_img_clear');         }         else if ($(window).width() >= 1024 && currentlysmall) {             currentlysmall = false;             console.log('more 1024');              $(".nav_shown").show();             $('.footerdiv_2').show();             $('div.burger_btn').hide();             $('#ft').removeclass('footer_img_clear').addclass('footerdiv_3');         }     }      //calling in else part above bind new scroll event each time     //instead, if should happen when screen large, use      //flag created     $(document).scroll(function () {         if (!currentlysmall) {             var headershow = $(this).scrolltop();             if (headershow > 200) {                 $('div.hidden_nav').fadein();                 $(".nav_shown").hide();             } else {                 $('div.hidden_nav').fadeout();                 $(".nav_shown").show();             }         }     });      $(window).resize(update);     update(); //force initial calculation since resize won't called when page loads });

now changes make in above update() function occur when screen sizes changes past 1024 breakpoint instead of every time screen resized.

fiddle: http://jsfiddle.net/25nfqxzk/1/

edit expanding off blgt's comment, don't believe need bind scroll event in if-else. can assigned outside , use same trigger flags.


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