窗口的ResizeStart和ResizeEnd事件

http://jsfiddle.net/04fLy8t4/

我实现了一个函数，它在用户DOM元素上触发两个事件:

调整大小开始 调整大小结束

代码:

var resizeEventsTrigger = (function () {
    function triggerResizeStart($el) {
        $el.trigger('resizestart');
        isStart = !isStart;
    }

    function triggerResizeEnd($el) {
        clearTimeout(timeoutId);
        timeoutId = setTimeout(function () {
            $el.trigger('resizeend');
            isStart = !isStart;
        }, delay);
    }

    var isStart = true;
    var delay = 200;
    var timeoutId;

    return function ($el) {
        isStart ? triggerResizeStart($el) : triggerResizeEnd($el);
    };

})();

$("#my").on('resizestart', function () {
    console.log('resize start');
});
$("#my").on('resizeend', function () {
    console.log('resize end');
});

window.onresize = function () {
    resizeEventsTrigger( $("#my") );
};

(function(){
    var special = jQuery.event.special,
        uid1 = 'D' + (+new Date()),
        uid2 = 'D' + (+new Date() + 1);

    special.resizestart = {
        setup: function() {
            var timer,
                handler =  function(evt) {
                    var _self = this,
                        _args = arguments;
                    if (timer) {
                        clearTimeout(timer);
                    } else {
                        evt.type = 'resizestart';
                        jQuery.event.handle.apply(_self, _args);
                    }

                    timer = setTimeout( function(){
                        timer = null;
                    }, special.resizestop.latency);
                };
            jQuery(this).bind('resize', handler).data(uid1, handler);
        },
        teardown: function(){
            jQuery(this).unbind( 'resize', jQuery(this).data(uid1) );
        }
    };

    special.resizestop = {
        latency: 200,
        setup: function() {
            var timer,
                handler = function(evt) {
                    var _self = this,
                        _args = arguments;
                    if (timer) {
                        clearTimeout(timer);
                    }
                    timer = setTimeout( function(){
                        timer = null;
                        evt.type = 'resizestop';
                        jQuery.event.handle.apply(_self, _args);
                    }, special.resizestop.latency);
                };

            jQuery(this).bind('resize', handler).data(uid2, handler);
        },
        teardown: function() {
            jQuery(this).unbind( 'resize', jQuery(this).data(uid2) );
        }
    };
})();

$(window).bind('resizestop',function(){
    //...
});

我自己写了一个小包装函数…

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);
    });
};

用法如下:

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

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

因为选择的答案实际上没有工作。如果你没有使用jquery，这里有一个简单的节流函数的例子，如何使用它来调整窗口大小

    function throttle(end,delta) {

    var base = this;

    base.wait = false;
    base.delta = 200;
    base.end = end;

    base.trigger = function(context) {

        //only allow if we aren't waiting for another event
        if ( !base.wait ) {

            //signal we already have a resize event
            base.wait = true;

            //if we are trying to resize and we 
            setTimeout(function() {

                //call the end function
                if(base.end) base.end.call(context);

                //reset the resize trigger
                base.wait = false;
            }, base.delta);
        }
    }
};

var windowResize = new throttle(function() {console.log('throttle resize');},200);

window.onresize = function(event) {
    windowResize.trigger();
}

Mark Coleman的答案当然比所选的答案要好得多，但如果你想避免超时ID的全局变量(Mark回答中的doit变量)，你可以做以下其中之一:

(1)使用立即调用的函数表达式(IIFE)来创建闭包。

$(window).resize((function() { // This function is immediately invoked
                               // and returns the closure function.
    var timeoutId;
    return function() {
        clearTimeout(timeoutId);
        timeoutId = setTimeout(function() {
            timeoutId = null; // You could leave this line out.
            // Code to execute on resize goes here.
        }, 100);
    };
})());

(2)使用事件处理函数的属性。

$(window).resize(function() {
    var thisFunction = arguments.callee;
    clearTimeout(thisFunction.timeoutId);
    thisFunction.timeoutId = setTimeout(function() {
        thisFunction.timeoutId = null; // You could leave this line out.
        // Code to execute on resize goes here.
    }, 100);
});

您可以将引用id存储到任何setInterval或setTimeout。是这样的:

var loop = setInterval(func, 30);

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

要在不使用“全局”变量的情况下做到这一点，可以向函数本身添加一个局部变量。例:

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

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