This time I will show you how to use JS to implement a dynamic progress bar, and what are the precautions for using JS to implement a dynamic progress bar. The following is a practical case, let's take a look.
1. Effect
<html>
<head>
<script type="text/javascript">
window.onload = function () {
var myProgress = document.getElementById("myProgress");
var mySpan = document.getElementById("mySpan");
var value = myProgress.value;
mySpan.innerText = value + "%";
var ID = setInterval(function () {
value = myProgress.value;
if (value < 100) {
value += 10;
myProgress.value = value;
mySpan.innerText = value + "%";
}
if (value == 100) {
clearInterval(ID);
}
}, 500);
}
</script>
</head>
<body>
<label for="myProgress">进度条</label>
<progress id="myProgress" value="0" max="100"></progress>
<span id="mySpan"></span>
</body>
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