所以我目前使用的是:
$(window).resize(function(){resizedw();});
但是在调整大小过程中,这个函数会被调用很多次。是否有可能在事件结束时捕获事件?
所以我目前使用的是:
$(window).resize(function(){resizedw();});
但是在调整大小过程中,这个函数会被调用很多次。是否有可能在事件结束时捕获事件?
当前回答
这是我根据@Mark Coleman的答案写的代码:
$(window).resize(function() {
clearTimeout(window.resizedFinished);
window.resizedFinished = setTimeout(function(){
console.log('Resized finished.');
}, 250);
});
谢谢马克!
其他回答
Internet Explorer提供一个resizeEnd事件。其他浏览器会在您调整大小时多次触发调整大小事件。
这里还有其他很好的答案,展示了如何使用setTimeout和lodash和下划线中的.throttle, .debounce方法,所以我将提到Ben Alman的throttle-debounce jQuery插件,它实现了你想要的东西。
假设你有这样一个函数,你想在调整大小后触发:
function onResize() {
console.log("Resize just happened!");
};
节流阀的例子 在下面的例子中,onResize()在调整窗口大小的过程中只会每250毫秒调用一次。
$(window).resize( $.throttle( 250, onResize) );
防反跳的例子 在下面的例子中,onResize()只会在窗口调整动作结束时被调用一次。这与@Mark在他的回答中呈现的结果相同。
$(window).resize( $.debounce( 250, onResize) );
(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) );
}
};
})();
$(window).bind('resizestop',function(){
//...
});
窗口的ResizeStart和ResizeEnd事件
http://jsfiddle.net/04fLy8t4/
我实现了一个函数,它在用户DOM元素上触发两个事件:
调整大小开始 调整大小结束
代码:
var resizeEventsTrigger = (function () {
function triggerResizeStart($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") );
};
这适用于我,因为我不想使用任何插件。
$(window).resize(function() {
var originalWindowSize = 0;
var currentWidth = 0;
var setFn = function () {
originalWindowSize = $(window).width();
};
var checkFn = function () {
setTimeout(function () {
currentWidth = $(window).width();
if (currentWidth === originalWindowSize) {
console.info("same? = yes")
// execute code
} else {
console.info("same? = no");
// do nothing
}
}, 500)
};
setFn();
checkFn();
});
在窗口重新大小调用“setFn”获得窗口的宽度,并保存为“originalWindowSize”。然后调用“checkFn”,在500ms(或您的首选项)后获得当前窗口大小,并将原始窗口与当前窗口进行比较,如果它们不相同,则窗口仍在重新调整大小。不要忘记在生产环境中删除控制台消息,并且(可选)可以使“setFn”自动执行。
更新!
我还创造了一个更好的选择: https://stackoverflow.com/a/23692008/2829600 (支持“删除功能”)
原来的帖子:
我写了这个简单的函数来处理执行中的延迟,在jQuery .scroll()和.resize()中很有用,所以callback_f只会对特定的id字符串运行一次。
function delay_exec( id, wait_time, callback_f ){
// IF WAIT TIME IS NOT ENTERED IN FUNCTION CALL,
// SET IT TO DEFAULT VALUE: 0.5 SECOND
if( typeof wait_time === "undefined" )
wait_time = 500;
// CREATE GLOBAL ARRAY(IF ITS NOT ALREADY CREATED)
// WHERE WE STORE CURRENTLY RUNNING setTimeout() FUNCTION FOR THIS ID
if( typeof window['delay_exec'] === "undefined" )
window['delay_exec'] = [];
// RESET CURRENTLY RUNNING setTimeout() FUNCTION FOR THIS ID,
// SO IN THAT WAY WE ARE SURE THAT callback_f WILL RUN ONLY ONE TIME
// ( ON LATEST CALL ON delay_exec FUNCTION WITH SAME ID )
if( typeof window['delay_exec'][id] !== "undefined" )
clearTimeout( window['delay_exec'][id] );
// SET NEW TIMEOUT AND EXECUTE callback_f WHEN wait_time EXPIRES,
// BUT ONLY IF THERE ISNT ANY MORE FUTURE CALLS ( IN wait_time PERIOD )
// TO delay_exec FUNCTION WITH SAME ID AS CURRENT ONE
window['delay_exec'][id] = setTimeout( callback_f , wait_time );
}
// USAGE
jQuery(window).resize(function() {
delay_exec('test1', 1000, function(){
console.log('1st call to delay "test1" successfully executed!');
});
delay_exec('test1', 1000, function(){
console.log('2nd call to delay "test1" successfully executed!');
});
delay_exec('test1', 1000, function(){
console.log('3rd call to delay "test1" successfully executed!');
});
delay_exec('test2', 1000, function(){
console.log('1st call to delay "test2" successfully executed!');
});
delay_exec('test3', 1000, function(){
console.log('1st call to delay "test3" successfully executed!');
});
});
/* RESULT
3rd call to delay "test1" successfully executed!
1st call to delay "test2" successfully executed!
1st call to delay "test3" successfully executed!
*/