jQuery - 如何在鼠标悬停在某个元素上时继续动画? [英] jQuery - How can I continue an animation while the mouse hovers over an element?
问题描述
我需要一种方法来执行某种'whileonmouseover'功能,以便在鼠标悬停在某个元素上的情况下继续进行动画... 例如,给定这个函数:
$ $ $ $ $ $ $ $ $ $ $ $($)
{
alert(1);
}
$('#button')。hover(function()
{
doAlert );
});
});
当鼠标悬停在#button上时,警报将会启动一次。我需要一种方法来继续让这种警报火力,而鼠标仍然在#button ...
我尝试做某种函数递归来继续警报,直到
$(document).ready(function()
{
var doLoop = true;
函数doAlert()
{
if(!doLoop)return;
$ b $ alert(1);
doAlert();
}
$('#button')。hover(function()
{
doAlert();
} ,function()
{
doLoop = false;
});
});
但是失败了。似乎函数完全忽略了'悬停'中的'doLoop = false'赋值。
有什么办法可以达到这个目的?
类似于:
var hoverInterval;
函数doStuff(){
//将按钮的背景设置为随机颜色
$(#button).css(background,#+ Math。 floor(Math.random()* 16777215).toString(16));
$(函数(){
$(#button)。hover(
函数(){
//每次调用doStuff 100毫秒
hoverInterval = setInterval(doStuff,100);
},
function(){
//停止调用doStuff
clearInterval(hoverInterval);
}
);
});
I need a way to perform some kind of 'whileonmouseover' function to continue an animation while the mouse overs over an element...
For example, given this function:
$(document).ready(function()
{
function doAlert()
{
alert(1);
}
$('#button').hover(function()
{
doAlert();
});
});
The alert will fire once as the mouse hovers over #button. I need a way to continue having that alert fire while the mouse remains over #button...
I've tried doing some kind of function recursion to continue the alert until a trigger is set causing it to stop:
$(document).ready(function()
{
var doLoop = true;
function doAlert()
{
if (!doLoop) return;
alert(1);
doAlert();
}
$('#button').hover(function()
{
doAlert();
}, function()
{
doLoop = false;
});
});
But that failed. Seems the function completely ignores the 'doLoop = false' assignment in 'hover off'.
Any way to accomplish this?
I'd recommend setting an interval instead of recursing because, assuming the final solution isn't just alerting but is doing something non-blocking, recursing while hovering can quickly cause memory hogging and unresponsiveness.
Something like:
var hoverInterval;
function doStuff() {
// Set button's background to a random color
$("#button").css("background", "#" + Math.floor(Math.random() * 16777215).toString(16));
}
$(function() {
$("#button").hover(
function() {
// call doStuff every 100 milliseconds
hoverInterval = setInterval(doStuff, 100);
},
function() {
// stop calling doStuff
clearInterval(hoverInterval);
}
);
});
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