[英]How to make this Jquery-blinking background stop after a few seconds?
几秒钟后如何使此Jquery闪烁后台停止? 我试图将背景和文字设置为闪烁,然后在3秒后停止。 谢谢您的帮助!
$(document).ready(function() { blinkFont(); }); function blinkFont() { document.getElementById("blink").style.color = "red" document.getElementById("blink").style.background = "black" setTimeout("setblinkFont()", 500) } function setblinkFont() { document.getElementById("blink").style.color = "black" document.getElementById("blink").style.background = "red" setTimeout("blinkFont()", 500) }
#blink { text-align: center; background: #000000; color: #F00; margin: 0; padding: 20px; } #blink span { font-size: 2em; font-weight: bold; display: block; }
<div id="blink"><span>This is blinking text and background</span> </div>
虽然我可以想到一些更优雅的方法来完成此操作,而无需过多更改当前结构,但是可以将Timeouts存储在变量中,然后使用clearInterval ,它会停止计时器,并在三秒钟后停止重复发生:
<script>
var intervalA;
var intervalB;
$(document).ready(function() {
blinkFont();
setTimeout(function() {
clearInterval(intervalA); clearInterval(intervalB);},3000);
});
function blinkFont() {
document.getElementById("blink").style.color = "red"
document.getElementById("blink").style.background = "black"
intervalA = setTimeout("setblinkFont()", 500);
}
function setblinkFont() {
document.getElementById("blink").style.color = "black"
document.getElementById("blink").style.background = "red"
intervalB = setTimeout("blinkFont()", 500);
}
</script>
</head>
<body>
<div id="blink"><span>This is blinking text and background</span>
</div>
</body>
您必须使用SetTimeout() , SetInterval()和clearInterval()如下代码。
HTML
<div id="blink"><span>Demo</span>
</div>
jQuery的
$(document).ready(function(){
var myVar;
myVar = setInterval(blinkFont, 500);
function blinkFont() {
var curColor = document.getElementById("blink").style.color;
var curBgC = document.getElementById("blink").style.background;
document.getElementById("blink").style.color = curColor === "red" ? "blue" : "red";
document.getElementById("blink").style.background = curBgC === "black" ? "yellow" : "black";
}
setTimeout(function () {
$("#blink").css('visibility', 'visible');
clearInterval(myVar);
}, 3000); // after 3 seconds it'll stop blinking
});
不用SetTimeout而是使用SetInterval,将变量随身携带。 并保持一个计数器,一旦达到所需的重复次数stopinterval,该计数器将在每次执行后递增。 像这样:
myVar=setInterval("javascript function", milliseconds);
//check your counter value.
window.clearInterval(myVar)
这个小提琴让您满意吗?
代码:
$(document).ready(function() {
var intval;
intval = setInterval(function(){
blinkFont();
},500);
setTimeout(function() {
alert('clear');
clearInterval(intval);
}, 3000);
});
function blinkFont() {
var curColor = document.getElementById("blink").style.color;
var curBgC = document.getElementById("blink").style.background;
document.getElementById("blink").style.color = curColor === "red" ? "blue" : "red";
document.getElementById("blink").style.background = curBgC === "black" ? "yellow" : "black";
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.