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How to display completion progress of a task in HTML5?
To visually demonstrate the completion of task or goal, we use the <progress> element. The max and value attributes show the progress made towards task completion. The <progress> element offers a visual representation of the completion status of task. It's typically displayed as a progress bar, indicating how much of a particular task has been completed. Here is the syntax for the <progress> tag in HTML ?
<progress value="20" max="100"></progress>
The <progress> element has both opening and closing tags. It is a new semantic element in HTML5. This progress bar id also used to display the progress of file being uploaded.
The HTML <progress> tag supports the following attributes ?
|
Attribute |
Value |
Description |
|---|---|---|
|
max |
Max |
It should have a value greater than zero and be a valid floating-point number. |
|
value |
value |
Specifies the amount of task completion. It should be a floating-point number between 0 and the max value, or between 0 and 1 if max is excluded. |
It also supports the global and event attributes.
Example
The following example demonstrates how to display task completion progress in HTML. This code creates a progress bar labeled "file copying Progress" Showing 45% completion. The <progress> element uses value and max attributes to visually represent the progress.
<!DOCTYPE html> <html> <body> <h1>Progress element in HTML</h1> <label for="file">File Copying Progress:</label> <progress id="file" value="45" max="100"> 45% </progress> </body> </html>
Now, let us see how to style the progress bar in HTML ?
CSS Styling the Progress bar
This HTML code creates a progress bar labeled "File Downloading Progress" showing 35% completion. The CSS styles the progress bar, setting its width to 250px and height to 20px.
<!DOCTYPE html>
<html>
<head>
<style>
progress[value] {
-webkit-appearance: none;
appearance: none;
width: 250px;
height: 20px;
}
</style>
</head>
<body>
<h1>Progress element in HTML</h1>
<label for="file">File Downloading Progress:</label>
<progress id="file" value="35" max="100"> 35% </progress>
</body>
Example
The following example creates a progress bar with "Increase" and "Decrease" buttons using HTML and JavaScript. Clicking the buttons adjusts the progress bar's width by 5%. The CSS styles the progress bar, while the JavaScript functions manage the width adjustments.
<!DOCTYPE html>
<html>
<style>
#container {
width: 100%;
background-color: gray;
}
#bar {
width: 0%;
height: 40px;
background-color: red;
}
</style>
<body>
<h1>Progress Bar</h1>
<div id="container">
<div id="bar"></div>
</div>
<br>
<button onclick="Increase()">Increase</button>
<button onclick="Decrease()">Decrease</button>
<!-- dispaying message for user -->
<h2>Increase by 5%</h2>
<h2>Decrease by 5%</h2>
<script>
function Increase() {
var elem = document.getElementById("bar");
var width = elem.style.width;
width = width.replace(/%/g, '');
if (width == "") width = '5';
else width = parseInt(width) + 5;
if (width == 100) {
width = width.toString() + '%';
elem.style.width = width;
} else if (width < 100) {
width = width.toString() + '%';
elem.style.width = width;
}
}
function Decrease() {
var elem = document.getElementById("bar");
var width = elem.style.width;
width = width.replace(/%/g, '');
if (width == "") width = '0';
else width = parseInt(width) - 5;
if (width == 0) {
width = width.toString() + '%';
elem.style.width = width;
} else if (width > 0) {
width = width.toString() + '%';
elem.style.width = width;
}
}
</script>
</body>
</html>
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