CODEWITHSUNDEEP
javascriptjquery
AllforAurora
AllforAurora

Reputation: 27

How to make this Jquery-blinking background stop after a few seconds?

How to make this Jquery-blinking background stop after a few seconds? I'm trying to set the background and text to blink and then stop after 3 seconds. Thanks for your help in advance!

$(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>

Upvotes: 1

Views: 2227

Answers (4)

prog1011
prog1011

Reputation: 3495

You have to use SetTimeout() , SetInterval() and clearInterval() as below code.

Click Here to see working Demo

HTML

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

Jquery

    $(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
    });

Here is Working JsFiddle - Click Here

Upvotes: 1

huan feng
huan feng

Reputation: 8623

Is this fiddle satisfied you?

code :

$(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";

}

Upvotes: 0

maiko
maiko

Reputation: 405

While I could think of a few more elegant ways to do this, without changing your current structure too much, you could store the Timeouts in variables and then use clearInterval , which stops a timer, to stop the recurrences after three seconds:

<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>

Upvotes: 1

PM.
PM.

Reputation: 1721

Instead of SetTimeout use SetInterval, keep the variable with you. And keep a counter, which will be incremented after every execution, once you reach the desired number of repetition, stopinterval. Something like this:

 myVar=setInterval("javascript function", milliseconds);

//check your counter value.
 window.clearInterval(myVar)

Upvotes: 0

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