Example of using css3 to create a ring progress bar
This article shares an example of using css3 to create a ring progress bar
Recently, a PC-side project has to create a page like this. Everything else is very simple. The key is the percentage ring effect. My initial plan was to use canvas to implement it directly, because it is very simple to implement a circle on canvas.
The code for the canvas implementation of the circle is posted below. If you need it, you can try it, because today I mainly talk about the CSS3 method, and I won’t explain more about the canvas
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<canvas id="canvas" width="200" height="200"></canvas>
<script>
var canvas = document.getElementById('canvas');
var process = 0;
var context = canvas.getContext('2d');
// 画外圆
context.beginPath();
context.arc(100, 100, 80, 0, Math.PI*2);
context.closePath();
context.fillStyle = '#666';
context.fill();
drawCricle(context, process);
function drawCricle(ctx, percent){
// 进度环
ctx.beginPath();
ctx.moveTo(100, 100);
ctx.arc(100, 100, 80, Math.PI * 1.5, Math.PI * (1.5 + 2 * percent / 100 ));
ctx.closePath();
ctx.fillStyle = 'red';
ctx.fill();
// 内圆
ctx.beginPath();
ctx.arc(100, 100, 75, 0, Math.PI * 2);
ctx.closePath();
ctx.fillStyle = 'white';
ctx.fill();
// 填充文字
ctx.font= "bold 30px microsoft yahei";
ctx.fillStyle = "black";
ctx.textAlign = "center";
ctx.textBaseline = 'middle';
ctx.moveTo(100, 100);
ctx.fillText(process + '%', 100, 100);
}
</script>
</body>
</html>The reason why I didn’t use canvas to implement it was because the product told me that there would be a lot of tasks in the future. I asked if there would be more than 99 tasks? He said it was possible, and you could set the upper limit at 999.
If 999 canvas rings are used to render. . . Hundreds of them are enough, so I have no choice but to use css3, at least it will be much faster. But it seems that there is no way to directly draw a progress ring in CSS.
I will post the complete code later, but here is the general structure.
To achieve the style of progress bar using css, the only way we can think of seems to be to use circles of different sizes to overlap. If you want the loading effect of the animation constantly rotating, that would be too much. If it were simple, I would be very happy, but it's a pity. .
First we need to create a background circle, like this
Then we need to create an inner circle to mask
It looks a bit like it, then our next focus is how to make it change with the percentage such as dynamic display. js is necessary, let me talk about the style first
Next step we need to create two semicircles, like this
css to achieve semicircle There are many methods, you can use Baidu by yourself. I use clip:rect(); this method to cut into a semicircle. After doing this, we only need to use js to control the rotation angle of the left and right semicircles rotate(). .
Remember to unify the colors of the left and right semicircles at the end, I will post it below Source code, you can introduce a jq and use it directly
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.circle {
width: 200px;
height: 200px;
position: relative;
border-radius: 50%;
background: red;
}
.clip_left,.clip_right{
width:200px;
height:200px;
position: absolute;
top: 0px;left: 0px;
}
.circle_left, .circle_right{
width:200px;
height:200px;
position: absolute;
border-radius: 50%;
top: 0px;left: 0px;
background: green;
}
/*出于展示用的改变背景色*/
/*.circle_left{
background: green;
}
.circle_right{
background: lightblue;
}*/
.circle_right,.clip_right {
clip:rect(0,auto,auto,100px);
}
.circle_left , .clip_left{
clip:rect(0,100px,auto,0);
}
/*
*当top和left取值为auto时，相当于0
*当bottom和right取值为auto时，相当于100%
*/
.mask {
width: 150px;
height: 150px;
border-radius: 50%;
left: 25px;
top: 25px;
background: #FFF;
position: absolute;
text-align: center;
line-height: 150px;
font-size: 16px;
}
</style>
</head>
<body>
<!--背景圆-->
<p class="circle">
<!--左半边圆-->
<p class="circle_left">
<p class="clip_left">
</p>
</p>
<!--右半边圆-->
<p class="circle_right">
<p class="clip_right"></p>
</p>
<p class="mask">
<span>10</span>%
</p>
</p>
<script src="../jquery-2.2.3.min.js"></script>
<script>
$(function(){
if( $('.mask span').text() <= 50 ){
$('.circle_right').css('transform','rotate('+($('.mask span').text()*3.6)+'deg)');
}else{
$('.circle_right').css({
'transform':'rotate(0deg)',
"background":"red"
});
$('.circle_left').css('transform','rotate('+(($('.mask span').text()-50)*3.6)+'deg)');
}
})
</script>
</body>
</html>The above is the detailed content of Example of using css3 to create a ring progress bar. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1658
14
1415
52
1309
25
1257
29
1231
24
Google Fonts Variable Fonts
Apr 09, 2025 am 10:42 AM
I see Google Fonts rolled out a new design (Tweet). Compared to the last big redesign, this feels much more iterative. I can barely tell the difference
How to Create an Animated Countdown Timer With HTML, CSS and JavaScript
Apr 11, 2025 am 11:29 AM
Have you ever needed a countdown timer on a project? For something like that, it might be natural to reach for a plugin, but it’s actually a lot more
HTML Data Attributes Guide
Apr 11, 2025 am 11:50 AM
Everything you ever wanted to know about data attributes in HTML, CSS, and JavaScript.
A Proof of Concept for Making Sass Faster
Apr 16, 2025 am 10:38 AM
At the start of a new project, Sass compilation happens in the blink of an eye. This feels great, especially when it’s paired with Browsersync, which reloads
How We Created a Static Site That Generates Tartan Patterns in SVG
Apr 09, 2025 am 11:29 AM
Tartan is a patterned cloth that’s typically associated with Scotland, particularly their fashionable kilts. On tartanify.com, we gathered over 5,000 tartan
How to Build Vue Components in a WordPress Theme
Apr 11, 2025 am 11:03 AM
The inline-template directive allows us to build rich Vue components as a progressive enhancement over existing WordPress markup.
PHP is A-OK for Templating
Apr 11, 2025 am 11:04 AM
PHP templating often gets a bad rap for facilitating subpar code — but that doesn't have to be the case. Let’s look at how PHP projects can enforce a basic
Programming Sass to Create Accessible Color Combinations
Apr 09, 2025 am 11:30 AM
We are always looking to make the web more accessible. Color contrast is just math, so Sass can help cover edge cases that designers might have missed.
