2 seconds
当用户按下div时,我想执行一些功能。
可能吗 ?
这是我检测对 div 的点击的代码
$('div').mousedown(function() {
});
添加一个限制,只允许在鼠标按下 2 秒后发生点击。
var timer;
$('div').on("mousedown",function(){
timer = setTimeout(function(){
alert("WORKY");
},2*1000);
}).on("mouseup mouseleave",function(){
clearTimeout(timer);
});
编辑:我也添加了 mouseleave,因为如果鼠标离开元素然后触发 mouseup,它不会停止计时器。
只需观察两者mousedown
并mouseup
计算差异。这是一个例子。
(function() {
// how many milliseconds is a long press?
var longpress = 3000;
// holds the start time
var start;
jQuery( "#pressme" ).on( 'mousedown', function( e ) {
start = new Date().getTime();
} );
jQuery( "#pressme" ).on( 'mouseleave', function( e ) {
start = 0;
} );
jQuery( "#pressme" ).on( 'mouseup', function( e ) {
if ( new Date().getTime() >= ( start + longpress ) ) {
alert('long press!');
} else {
alert('short press!');
}
} );
}());
在被问到这个问题后的两年里,发明了一个名为 jQuery Finger 的很棒的插件:
http://ngryman.sh/jquery.finger/
$('div').on('press', function(e) {
console.log(this, e);
});
短按和长按事件 - 长按防止短按
//from e-OS menu script
var longpress = 800;
var start;
var timer;
//short press - show e-OS system menu
//long press - show e-OS settings
$( "#e-OS-menu" ).on( 'mousedown', function( e ) {
start = new Date().getTime();
timer = setTimeout(function(){ console.log('long press!'); }, longpress)
}).on( 'mouseleave', function( e ) {
start = 0;
clearTimeout(timer);
}).on( 'mouseup', function( e ) {
if ( new Date().getTime() < ( start + longpress ) ) {
clearTimeout(timer);
console.log('short press!');
}
});
我知道这个问题现在已经很老了,但我一直在寻找类似的东西,发现 Buley 的答案接近我所需要的。我想我会发布我用它做的事情,让它在没有鼠标的情况下运行,有点像 Android longtouch。
// Set the duration of the long press and declare a couple variables
var longpress = 1000;
var start;
var divMouseDown;
// Check for mousedown on the element of choice
$("#element").on('mousedown', function(e){
// Get the time it was clicked
start = new Date().getTime();
// See if mouse is still being held down after the longpress duration
divMouseDown = setTimeout(function(){
// What we want to happen when mouse is clicked and held for 1 second
}, longpress);
// If the mouse leaves the element or is released before the long touch event,
// reset variables and stop the function from triggering
$("#element").on('mouseup mouseleave', function(){
if (divMouseDown) {
clearTimeout(divMouseDown);
}
start = 0;
e.stopPropagation();
} );
} );
升级和合并Editor和Kevin B的回复,您可以拥有一个功能齐全的、多 div、hold-catcher:
// Global delta msec timeout
var delta = 1500;
$("#foo").on('mousedown', function(event) {
var thisElement = $(event.currentTarget);
var deltaTimer = setTimeout(function(){
console.log('long press!');
thisElement.removeData('startTimestamp');
}, delta);
thisElement.data('startTimestamp', new Date().getTime());
thisElement.data('timer', deltaTimer);
}).on('mouseleave', function(event) {
var thisElement = $(event.currentTarget);
clearTimeout(thisElement.data('timer'));
thisElement.removeData('startTimestamp');
thisElement.removeData('timer');
}).on('mouseup', function(event) {
var thisElement = $(event.currentTarget);
var startTimestamp = thisElement.data('startTimestamp');
clearTimeout(thisElement.data('timer'));
if (startTimestamp !== undefined && !isNaN(parseInt(startTimestamp))) {
if (new Date().getTime() >= (startTimestamp + delta))
console.log('long press!');
else
console.log('short press!');
}
thisElement.removeData('startTimestamp');
thisElement.removeData('timer');
});
您可以使用以下代码(在JSFiddle中测试):
$('#foo').mousedown(function(){
$(this).data('lastPressed', new Date().getTime());
}).mouseup(function(){
var lastPressed = $(this).data('lastPressed');
if (lastPressed){
var duration = new Date().getTime() - lastPressed;
$(this).data('lastPressed', false);
if (duration > 2000) {
alert('Your click lasted more than 2 seconds.');
} else {
alert('Your click lasted less than 2 seconds.');
}
}
}).mouseout(function(){
$(this).data('lastPressed', false);
});
所以这显然在未来还有很长的路要走,但是对于仍然想要这样做的人来说,一个超级简单且非常优雅的方法是将 clearTimeout 函数与 mouseup / mouseout 事件结合起来:
$('#button').mousedown(function(){
var timer = setTimeout(
() => {alert('long press occurred');}, 600
);
}).mouseup(function(){
clearTimeout(timer);
}).mouseout(function(){
clearTimeout(timer);
});
#button {
width: 50px;
height: 50px;
background-color: blue;
color: white;
display: flex;
flex-direction: column;
text-align: center;
justify-content: center;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="button">press here</div>
当您检测到对 div 的点击时,您可以获得时间戳,这要归功于mousedown
. 同样,您可以在检测到点击释放时获取时间戳,这要归功于mouseup
.
然后您需要比较这两个时间戳,如果它们大于 2 秒(或 2000 毫秒),则执行您的函数。
此解决方案在您设置的时间后执行操作。如果您用鼠标离开按下的元素,它也会取消操作。
var longpress={
pressed:false,
longpressed:false,
presstime:1000
};
$('#element').on( 'mousedown' , function( event ) {
longpress.longpressed=false;
longpress.pressed=true;
longpress.timeout=setTimeout(function() {
longpress.longpressed=true;
//Long press action here!
},longpress.presstime);
}).on( 'mouseup' , function( event ) {
clearTimeout(longpress.timeout);
if (!longpress.longpressed && longpress.pressed) {
longpress.pressed=false;
//Short press action here!
}
}).on('mouseleave', function( event ) {
clearTimeout(longpress.timeout);
longpress.pressed=false;
});
简单的。无需冗长的不必要的编码。
(function(){
// how many milliseconds is a long press?
var offset = 500;
$(".button").on('mousedown', function(e){
// holds the start time
$(this).data('start',new Date().getTime());
$(this).addClass("selected");
}).on('mouseup', function(e){
if (new Date().getTime() >= ($(this).data('start') + offset)){
//alert('ur click lasted for over 2 secs');
$(this).addClass("selected");
}else{
$(this).removeClass("selected");
}
}).on('mouseleave', function(e){
start = 0;
//you can add destroy lingering functions on mouse leave
});
}());
我们可以计算鼠标点击离开时的时间差。timestamp
当您单击并释放 abutton
或div
使用mousedown
and时,我们可以得到mouseup
这是一个检测简单点击和2 seconds
长按的示例。在这里,我已经完成了button
新闻。同样,您可以使用div
$(document).ready(function () {
var pressTime; // store the press time
$("#pressHere").on('mouseup', function () {
var holdTime = 2000; //2 milliseconds for long press
if (new Date().getTime() >= (pressTime + holdTime))
$("#status").text("It's a Long Press...");
else
$("#status").text("It's a Short Press...");
}).on('mousedown', function () { // When Button Release
pressTime = new Date().getTime();
}).on('mouseleave', function () { // When Button Leave
pressTime = 0;
});
});
.input-bar-item {
display: table-cell;
}
.button-item {
margin: 20px;
width: 30%;
}
.width100 {
width: 60%;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="input-bar-item button-item">
<button class="btn btn-info" id="pressHere">Press Me</button>
</div>
<div class="input-bar-item width100" id="status"></div>