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How do I refresh a DIV content every 30 seconds?

Time：04-26

I am trying to refresh a certain div to refresh every 30 seconds. There are others div's on my HTML page, but they do not need to refresh.

The idea is to reload/refresh the div itself.

I have tried this script, but can not get it to work. Here is my HTML and Javascript code The path in my html file is

<link rel="stylesheet" href="./difcol.css" type="text/css" media="screen">
Here are my css file for refresh.

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
  $(document).ready(function() {
    setInterval(function() {
      $("refresh").load(window.location.href   " refresh");
    }, 30000);
  });
</script>

<div id="refresh" >
  <div >
    <div ></div>
    <h2 >1</h2>
    <h2 >2</h2>
    <h2 >3</h2>
    <h2 >4</h2>
    <h2 >5</h2>
    <h2 >6</h2>
    <h2 >
      <span>a,</span>
      <span>b,</span>
      <span>c</span>
    </h2>
  </div>
</div>

@import url('https://fonts.googleapis.com/css?family=Barlow');

body {
  background: #310404 url(https://i.ytimg.com/vi/wOvQAhzWCrM/maxresdefault.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  font-family: 'Barlow', sans-serif;
}
.container {
  width: 100%;
  position: relative;
  overflow: hidden;
}
a {
  text-decoration: none;
}
h1.main, p.demos {
  -webkit-animation-delay: 18s;
  -moz-animation-delay: 18s;
  -ms-animation-delay: 18s;
  animation-delay: 18s;
}
.sp-container {
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  z-index: 0;
  background: -webkit-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
  background: -moz-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
  background: -ms-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
  background: radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
}
.sp-content {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0px;
  top: 0px;
  z-index: 1000;
}
.sp-container h2 {
  position: absolute;
  top: 50%;
  line-height: 100px;
  height: 90px;
  margin-top: -50px;
  font-size: 90px;
  width: 100%;
  text-align: center;
  color: transparent;
  -webkit-animation: blurFadeInOut 3s ease-in backwards;
  -moz-animation: blurFadeInOut 3s ease-in backwards;
  -ms-animation: blurFadeInOut 3s ease-in backwards;
  animation: blurFadeInOut 3s ease-in backwards;
}
.sp-container h2.frame-1 {
    font-size: 200px;
  -webkit-animation-delay: 0s;
  -moz-animation-delay: 0s;
  -ms-animation-delay: 0s;
  animation-delay: 0s;
}
.sp-container h2.frame-2 {
    font-size: 200px;
  -webkit-animation-delay: 3s;
  -moz-animation-delay: 3s;
  -ms-animation-delay: 3s;
  animation-delay: 3s;
}
.sp-container h2.frame-3 {
    font-size: 200px;
  -webkit-animation-delay: 6s;
  -moz-animation-delay: 6s;
  -ms-animation-delay: 6s;
  animation-delay: 6s;
}
.sp-container h2.frame-4 {
  font-size: 200px;
  -webkit-animation-delay: 9s;
  -moz-animation-delay: 9s;
  -ms-animation-delay: 9s;
  animation-delay: 9s;
}
.sp-container h2.frame-5 {
  font-size: 200px;
  -webkit-animation-delay: 12s;
  -moz-animation-delay:12s;
  -ms-animation-delay: 12s;
  animation-delay: 12s;
}
.sp-container h2.frame-6 {
  font-size: 200px;
  -webkit-animation-delay: 15s;
  -moz-animation-delay: 15s;
  -ms-animation-delay: 15s;
  animation-delay: 15s;
}

.sp-container h2.frame-7 {
  -webkit-animation: none;
  -moz-animation: none;
  -ms-animation: none;
  animation: none;
  color: transparent;
  text-shadow: 0px 0px 1px #fff;
}
.sp-container h2.frame-7 span {
  -webkit-animation: blurFadeIn 3s ease-in 18s backwards;
  -moz-animation: blurFadeIn 1s ease-in 18s backwards;
  -ms-animation: blurFadeIn 3s ease-in 18s backwards;
  animation: blurFadeIn 3s ease-in 18s backwards;
  color: transparent;
  text-shadow: 0px 0px 1px #fff;
}
.sp-container h2.frame-7 span:nth-child(2) {
  -webkit-animation-delay: 21s;
  -moz-animation-delay: 21s;
  -ms-animation-delay: 21s;
  animation-delay: 21s;
}
.sp-container h2.frame-7 span:nth-child(3) {
  -webkit-animation-delay: 24s;
  -moz-animation-delay: 24s;
  -ms-animation-delay: 24s;
  animation-delay: 24s;
}
.sp-globe {
  position: absolute;
  width: 282px;
  height: 273px;
  left: 50%;
  top: 50%;
  margin: -137px 0 0 -141px;
 /* background: transparent url(http://web-sonick.zz.mu/images/sl/globe.png) no-repeat top left;*/
  -webkit-animation: fadeInBack 3.6s linear 14s backwards;
  -moz-animation: fadeInBack 3.6s linear 14s backwards;
  -ms-animation: fadeInBack 3.6s linear 14s backwards;
  animation: fadeInBack 3.6s linear 14s backwards;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=30)";
  filter: alpha(opacity=30);
  opacity: 0.3;
  -webkit-transform: scale(5);
  -moz-transform: scale(5);
  -o-transform: scale(5);
  -ms-transform: scale(5);
  transform: scale(5);
}
.sp-circle-link {
  position: absolute;
  left: 50%;
  bottom: 100px;
  margin-left: -50px;
  text-align: center;
  line-height: 100px;
  width: 100px;
  height: 100px;
  background: #fff;
  color: #3f1616;
  font-size: 25px;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  -webkit-animation: fadeInRotate 1s linear 16s backwards;
  -moz-animation: fadeInRotate 1s linear 16s backwards;
  -ms-animation: fadeInRotate 1s linear 16s backwards;
  animation: fadeInRotate 1s linear 16s backwards;
  -webkit-transform: scale(1) rotate(0deg);
  -moz-transform: scale(1) rotate(0deg);
  -o-transform: scale(1) rotate(0deg);
  -ms-transform: scale(1) rotate(0deg);
  transform: scale(1) rotate(0deg);
}
.sp-circle-link:hover {
  background: #85373b;
  color: #fff;
}
/**/

@-webkit-keyframes blurFadeInOut {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    -webkit-transform: scale(1.3);
  }
  20%, 75% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    -webkit-transform: scale(1);
  }
  100% {
    opacity: 0;
    text-shadow: 0px 0px 50px #fff;
    -webkit-transform: scale(0);
  }
}
@-webkit-keyframes blurFadeIn {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    -webkit-transform: scale(1.3);
  }
  50% {
    opacity: 0.5;
    text-shadow: 0px 0px 10px #fff;
    -webkit-transform: scale(1.1);
  }
  100% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    -webkit-transform: scale(1);
  }
}
@-webkit-keyframes fadeInBack {
  0% {
    opacity: 0;
    -webkit-transform: scale(0);
  }
  50% {
    opacity: 0.4;
    -webkit-transform: scale(2);
  }
  100% {
    opacity: 0.2;
    -webkit-transform: scale(5);
  }
}
@-webkit-keyframes fadeInRotate {
  0% {
    opacity: 0;
    -webkit-transform: scale(0) rotate(360deg);
  }
  100% {
    opacity: 1;
    -webkit-transform: scale(1) rotate(0deg);
  }
}
/**/

@-moz-keyframes blurFadeInOut {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    -moz-transform: scale(1.3);
  }
  20%, 75% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    -moz-transform: scale(1);
  }
  100% {
    opacity: 0;
    text-shadow: 0px 0px 50px #fff;
    -moz-transform: scale(0);
  }
}
@-moz-keyframes blurFadeIn {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    -moz-transform: scale(1.3);
  }
  100% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    -moz-transform: scale(1);
  }
}
@-moz-keyframes fadeInBack {
  0% {
    opacity: 0;
    -moz-transform: scale(0);
  }
  50% {
    opacity: 0.4;
    -moz-transform: scale(2);
  }
  100% {
    opacity: 0.2;
    -moz-transform: scale(5);
  }
}
@-moz-keyframes fadeInRotate {
  0% {
    opacity: 0;
    -moz-transform: scale(0) rotate(360deg);
  }
  100% {
    opacity: 1;
    -moz-transform: scale(1) rotate(0deg);
  }
}
/**/

@keyframes blurFadeInOut {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    transform: scale(1.3);
  }
  20%, 75% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    text-shadow: 0px 0px 50px #fff;
    transform: scale(0);
  }
}
@keyframes blurFadeIn {
  0% {
    opacity: 0;
    text-shadow: 0px 0px 40px #fff;
    transform: scale(1.3);
  }
  50% {
    opacity: 0.5;
    text-shadow: 0px 0px 10px #fff;
    transform: scale(1.1);
  }
  100% {
    opacity: 1;
    text-shadow: 0px 0px 1px #fff;
    transform: scale(1);
  }
}
@keyframes fadeInBack {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  50% {
    opacity: 0.4;
    transform: scale(2);
  }
  100% {
    opacity: 0.2;
    transform: scale(5);
  }
}
@keyframes fadeInRotate {
  0% {
    opacity: 0;
    transform: scale(0) rotate(360deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

CodePudding user response：

You're lacking # in $("refresh") for referring to refresh id. The change should be

$("#refresh").load(window.location.href   " refresh");

Note that I reduced the interval time to 1 second and put a log to show differences

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
  $(document).ready(function() {
    setInterval(function() {
      $("#refresh").load(window.location.href   " refresh", function() { console.log("loaded") });
    }, 1000);
  });
</script>

<div id="refresh" >
  <div >
    <div ></div>
    <h2 >1</h2>
    <h2 >2</h2>
    <h2 >3</h2>
    <h2 >4</h2>
    <h2 >5</h2>
    <h2 >6</h2>
    <h2 >
      <span>a,</span>
      <span>b,</span>
      <span>c</span>
    </h2>
  </div>
</div>

CodePudding user response：

You can put the contents of the div in a javascript variable once the page loads then in your set interval function: document.getElementById('refresh').innerHTML = x; :

<head>
<script>
var x = document.getElementById('refresh').innerHTML;

setInterval(function() {
     document.getElementById('refresh').innerHTML = x;
    }, 30000);
</script>
</head>

Page link：https//www.codepudding.com/Softwareengineering/385162.html

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