performance - Efficient way of using window.resize (or other method) to fire jquery functions, and making gridster.js repsonsive -


i have been tinkering thoughts on round-about way of making gridster.js responsive. found code snippit in github issues in gridster , realized if ran under window sizing , destroyed , re-ran gridster can effect of gridster responding responsivley. let me show mean - 

$(window).resize(function(){             var width = $(window).width();             var columns = "";              if(modernizr.mq('screen , (max-width:640px)')){                 columns = 1;                 gridster.destroy();                 var toofar = $('.gridster .gs-w').filter(function () {                   return $(this).data('col') > columns;                 });                 $(toofar).each(function () {                   $(this).attr('data-col', '1');                     });                  var toobig = $('.gridster li').filter(function () {                   return $(this).data('sizex') > columns;                 });                 $(toobig).each(function () {                   $(this).attr('data-sizex', columns);                  });                 $(".gridster ul").gridster({                     widget_base_dimensions: [300, 300],                     widget_margins: [5, 5],                       max_cols: 1,                       resize: {                           enabled: true                         },                         draggable: {                           handle: '.dragdiv'                         },                     serialize_params: function ($w, wgd) {                                       return {                             /* add element id data*/                             id: $w.attr('id'),                             /* defaults */                             col: wgd.col,                             row: wgd.row,                             size_x: wgd.size_x,                             size_y: wgd.size_y,                            /* htmlcontent: $($w).html() */                         }                     }         }).data('gridster');             }          });

so when gridster should break 1 column (it has base of 4), destroys , re runs 1 column. works surprisingly well, issue not pretty way of achieving this. not showing break points ( breaks into, 3 -2 -1 columns based on window size). runs poorly because firing on every window resize, , i'm wondering if there cleaner way functions fire once when hit window size.

also - size gridster down, if size out not expand, have not tried building functions yet.

any pointers or suggestions in using maybe isn't listening every single instance of window re-size super helpful.

thanks!!

i gather question gridster being re-run continuously user resizes window; is, if resize window dragging window slowly, pixel pixel, there gridster re-run every pixel change.

try throttling resize event settimeout. when resize fires, set timer re-run of gridster -- timer duration 200ms. if within 200ms, resize fires, reset timer. approach, re-run occurs when user done resizing (at least moment). can tweak timer duration better experience.

try:

var resizetimeout; $(window).resize(function(){   if(!!resizetimeout){ cleartimeout(resizetimeout); }   resizetimeout = settimeout(function(){     //do gridster re-run here   },200); });

example fiddle (look @ console resize window)

edit: interested in pattern, i've extracted throttling logic above code , put jquery plugin:

(function($){     $.fn.ondelayed = function(eventname,delayinms,callback){         var _timeout;         this.on(eventname,function(e){           if(!!_timeout){                cleartimeout(_timeout);                console.log('timer being re-set: ' + eventname);           } else {               console.log('timer being set first time: ' + eventname);           }           _timeout = settimeout(function(){               callback(e);           },delayinms);         });     }; })(jquery);

which used like

$(function(){     $(document).ondelayed('click',500,function(){         alert('clicking done');     });     $(window).ondelayed('resize',1000,function(){         alert('resize finished');     }); });

fiddle 2 example uses of ondelayed


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