jQuery - how to wait for the 'end' of '

Question

So I currently use something like:

$(window).resize(function(){resizedw();});

But this gets called many times while resizing process goes on. Is it possible to catch an event when it ends?

Answer 1

There is an elegant solution using the Underscore.js So, if you are using it in your project you can do the following -

$( window ).resize( _.debounce( resizedw, 500 ) );

---

This should be enough :) But, If you are interested to read more on that, you can check my blog post - http://rifatnabi.com/post/detect-end-of-jquery-resize-event-using-underscore-debounce(deadlink)

Answer 2

i wrote a litte wrapper function on my own...

onResize  =   function(fn) {
    if(!fn || typeof fn != 'function')
        return 0;

    var args    = Array.prototype.slice.call(arguments, 1);

    onResize.fnArr    = onResize.fnArr || [];
    onResize.fnArr.push([fn, args]);

    onResize.loop   = function() {
        $.each(onResize.fnArr, function(index, fnWithArgs) {
            fnWithArgs[0].apply(undefined, fnWithArgs[1]);
        });
    };

    $(window).on('resize', function(e) {
        window.clearTimeout(onResize.timeout);
        onResize.timeout    = window.setTimeout("onResize.loop();", 300);
    });
};

Here is the usage:

var testFn  = function(arg1, arg2) {
    console.log('[testFn] arg1: '+arg1);
    console.log('[testFn] arg2: '+arg2);
};

// document ready
$(function() {
    onResize(testFn, 'argument1', 'argument2');
});

Answer 3

Here is VERY simple script to trigger both a 'resizestart' and 'resizeend' event on the window object.

There is no need to muck around with dates and times.

The d variable represents the number of milliseconds between resize events before triggering the resize end event, you can play with this to change how sensitive the end event is.

To listen to these events all you need to do is:

resizestart: $(window).on('resizestart', function(event){console.log('Resize Start!');});

resizeend: $(window).on('resizeend', function(event){console.log('Resize End!');});

(function ($) {
    var d = 250, t = null, e = null, h, r = false;

    h = function () {
        r = false;
        $(window).trigger('resizeend', e);
    };

    $(window).on('resize', function (event) {
        e = event || e;
        clearTimeout(t);

        if (!r) {
            $(window).trigger('resizestart', e);
            r = true;
        }

        t = setTimeout(h, d);
    });
}(jQuery));

Answer 4

var flag=true;
var timeloop;

$(window).resize(function(){
    rtime=new Date();
    if(flag){
        flag=false;
        timeloop=setInterval(function(){
            if(new Date()-rtime>100)
                myAction();
        },100);
    }
})
function myAction(){
    clearInterval(timeloop);
    flag=true;
    //any other code...
}

Answer 5

I wrote a function that passes a function when wrapped in any resize event. It uses an interval so that the resize even isn't constantly creating timeout events. This allows it to perform independently of the resize event other than a log entry that should be removed in production.

https://github.com/UniWrighte/resizeOnEnd/blob/master/resizeOnEnd.js

        $(window).resize(function(){
            //call to resizeEnd function to execute function on resize end.
    //can be passed as function name or anonymous function
            resizeEnd(function(){



    });

        });

        //global variables for reference outside of interval
        var interval = null;
        var width = $(window).width();
    var numi = 0; //can be removed in production
        function resizeEnd(functionCall){
            //check for null interval
            if(!interval){
                //set to new interval
                interval = setInterval(function(){
        //get width to compare
                    width2 = $(window).width();
        //if stored width equals new width
                    if(width === width2){
                        //clear interval, set to null, and call passed function
                        clearInterval(interval);
                        interval = null; //precaution
                        functionCall();

                    }
        //set width to compare on next interval after half a second
                    width = $(window).width();
                }, 500);

            }else{
                //logging that should be removed in production
                console.log("function call " + numi++ + " and inteval set skipped");

            }

}

Answer 6

You can store a reference id to any setInterval or setTimeout. Like this:

var loop = setInterval(func, 30);

// some time later clear the interval
clearInterval(loop);

To do this without a "global" variable you can add a local variable to the function itself. Ex:

$(window).resize(function() {
    clearTimeout(this.id);
    this.id = setTimeout(doneResizing, 500);
});

function doneResizing(){
  $("body").append("<br/>done!");   
}