我有一个超时的HTML页面。我想在按下按钮(#pauseButton
)时冻结它们,然后在再次按下时恢复它们,最好还冻结所有BS4和jQuery动画。
<button id="pauseButton"></button>
<script>
$(document).ready(function(){
setTimeout(function() {
alert("This is an alert")
},10000);
$("#pauseButton").click(function(){
// Pause timeouts and page
});
});
</script>
编辑
我被告知可能存在重复的答案,因此我现在集中在暂停动画和其他页面元素上。
该答案显示了如何仅暂停超时。
答案 0 :(得分:2)
有很多方法可以解决此问题。正如{EmadZamout在评论中提到的那样,question中提到了其中的许多内容。
但是,如果您正在寻找一种简单的方法,也许是另一种解决方法。尝试这个。在这里,我正在使用requestAnimationFrame
解决问题
let ran = Date.now(); // contains the last updated time
let time = 0; // time in seconds
let paused = false; // store the state
const func = () => {
if (!paused && Date.now() - ran > 1000) {
time++;
ran = Date.now();
console.log('now')
}
if (time === 8)
return alert('This works!');
requestAnimationFrame(func);
}
func();
document.querySelector('button').addEventListener('click', () => paused = !paused);
<button>Change state</button>
要停止网站上的所有动画,您需要手动停止每个动画。
要停止jQuery动画,可以使用.stop()
帮助器。一个例子:
let paused = false; // state of the animation
let dir = 'down'; // to store the direction of animation so that the next time continues in the correct direction
let timeDown = 2000; // to animate properly after resuming
let timeUp = 2000; // to animate properly after resuming
// the initial calling of the animation
(function() {
slideDown();
})();
// function which resumes the animation
function animate() {
switch (dir) {
case 'up':
slideUp();
break;
case 'down':
slideDown();
break;
}
}
// a function to animate in the uppward direction
function slideUp() {
dir = 'up'; // setting direction to up
timeDown = 2000; // resetting the duration for slideDown function
$('div').stop().animate({
left: 0
}, {
duration: timeUp,
complete: slideDown, // calling slideDown function on complete
progress: function (animation, progress, ms) {
timeUp = ms; // changing the duration so that it looks smooth when the animation is resumed
}
}); // actual animation
}
// a function to animate in the downward direction
function slideDown() {
dir = 'down'; // setting direction to down
timeUp = 2000; // resetting the duration for slideDown function
$('div').stop().animate({
left: 200
}, {
duration: timeDown,
complete: slideUp, // calling slideUp function on complete
progress: function (animation, progress, ms) {
timeDown = ms; // changing the duration so that it looks smooth when the animation is resumed
}
}); // actual animation
}
// button click event listener
$('button').click(function() {
if (paused)
animate(); // to resume the animation
else
$('div').stop(); // to stop all the animations on the object
paused = !paused; // toggling state
});
div {
position: relative;
width: 100px;
height: 100px;
background: dodgerblue;
}
<button>Pause</button>
<div></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
对于自举,我认为您没有提到任何这种情况下需要暂停的自举动画,因为自举动画取决于用户的交互作用。如果要防止用户交互,可以在网站上放置一个“已暂停”的覆盖。或者,如果您不想这样做,可以使用CSS属性pointer-events: none
禁用所有指针事件。
现在,对于CSS动画,您可以将名为animation-play-state
的属性设置为paused
。
如果要在用户不在页面上时将动画的状态更改为暂停(据我对您的更新问题的理解),可以为此使用新的visibilityState
API。可见性发生变化时,会触发一个事件visibilitychange
。
document.addEventListener("visibilitychange", function() {
console.log( document.visibilityState );
document.querySelector('div').innerHTML = document.visibilityState;
});
<div>
Try opening a different tab or change the focus to another app
</div>