Question

如何让这个Jquery闪烁的背景在几秒后停止？我正在尝试将背景和文本设置为闪烁，然后在3秒后停止。感谢您的帮助！

$(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>

Answer 1

使用SetInterval代替SetTimeout，保留变量。并保留一个计数器，一旦达到所需的重复次数，停止间隔，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)

Answer 2

虽然我可以想到一些更优雅的方法来实现这一点，但不会更改太多的当前结构，您可以将超时存储在变量中，然后使用clearInterval，这会停止一个计时器，在三秒钟后停止复发：

<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>

Answer 3

这fiddle对你满意吗？

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";

}

Answer 4

您必须使用SetTimeout()，SetInterval()和clearInterval()，如下所示。

<强> Click Here to see working Demo

<强> HTML

<div id="blink"><span>Demo</span>
</div>

<强> 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
    });

<强> Here is Working JsFiddle - Click Here

如何使这个Jquery闪烁的背景在几秒后停止？

4 个答案: