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
我不知道我的代码是否适用于其他人,但它对我来说真的很好。我通过分析Dolan Antenucci的代码得到了这个想法,因为他的版本不适合我,我真的希望它能对别人有所帮助。
var tranStatus = false;
$(window).resizeend(200, function(){
$(".cat-name, .category").removeAttr("style");
//clearTimeout(homeResize);
$("*").one("webkitTransitionEnd otransitionend oTransitionEnd msTransitionEnd transitionend",function(event) {
tranStatus = true;
});
processResize();
});
function processResize(){
homeResize = setInterval(function(){
if(tranStatus===false){
console.log("not yet");
$("*").one("webkitTransitionEnd otransitionend oTransitionEnd msTransitionEnd transitionend",function(event) {
tranStatus = true;
});
}else{
text_height();
clearInterval(homeResize);
}
},200);
}
其他回答
这是我用来延迟重复操作的,它可以在你的代码中的多个地方调用:
function debounce(func, wait, immediate) {
var timeout;
return function() {
var context = this, args = arguments;
var later = function() {
timeout = null;
if (!immediate) func.apply(context, args);
};
var callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) func.apply(context, args);
};
};
用法:
$(window).resize(function () {
debounce(function() {
//...
}, 500);
});
有一个比计算两次调用之间的增量时间更简单的方法来在调整大小结束时执行函数,简单地像这样做:
var resizeId;
$(window).resize(function() {
clearTimeout(resizeId);
resizeId = setTimeout(resizedEnded, 500);
});
function resizedEnded(){
...
}
和Angular2的等价函数:
private resizeId;
@HostListener('window:resize', ['$event'])
onResized(event: Event) {
clearTimeout(this.resizeId);
this.resizeId = setTimeout(() => {
// Your callback method here.
}, 500);
}
对于angular方法,在setTimeout中使用()=>{}符号来保留作用域,否则你将无法进行任何函数调用或使用它。
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);
});
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) );
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!
*/