A progress bar is a graphical representation of data used to visualize or show status of the data such as a download, file transfer, number of counts or installation. So, here we will create progress bar in React. The code below creates a circular progressbar in React.
class CircularProgressBar extends React.Component {
constructor(props) {
super(props);
this.state = {};
}
render() {
// Size of the enclosing square
const sqSize = this.props.sqSize;
// SVG centers the stroke width on the radius, subtract out so circle fits in square
const radius = (this.props.sqSize - this.props.strokeWidth) / 2;
// Enclose cicle in a circumscribing square
const viewBox = `0 0 ${sqSize} ${sqSize}`;
// Arc length at 100% coverage is the circle circumference
const dashArray = radius * Math.PI * 2;
// Scale 100% coverage overlay with the actual percent
const dashOffset = dashArray - dashArray * this.props.percentage / 100;
return (
<svg
width={this.props.sqSize}
height={this.props.sqSize}
viewBox={viewBox}>
<circle
className="circle-background"
cx={this.props.sqSize / 2}
cy={this.props.sqSize / 2}
r={radius}
strokeWidth={`${this.props.strokeWidth}px`} />
<circle
className="circle-progress"
cx={this.props.sqSize / 2}
cy={this.props.sqSize / 2}
r={radius}
strokeWidth={`${this.props.strokeWidth}px`}
// Start progress marker at 12 O'Clock
transform={`rotate(-90 ${this.props.sqSize / 2} ${this.props.sqSize / 2})`}
style= />
<text
className="circle-text"
x="50%"
y="50%"
dy=".3em"
textAnchor="middle">
{`${this.props.percentage}%`}
</text>
</svg>
);
}
}
CircularProgressBar.defaultProps = {
sqSize: 200,
percentage: 75,
strokeWidth: 10
};
Now, we have <CircularProgressBar /> progressbar component in react which we can use in our functional or class components. For example here we are using in our App Component.
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
percentage: 50
};
this.handleChangeEvent = this.handleChangeEvent.bind(this);
}
handleChangeEvent(event) {
this.setState({
percentage: event.target.value
});
}
render() {
return (
<div>
<CircularProgressBar
strokeWidth="10"
sqSize="200"
percentage={this.state.percentage}/>
<div>
<input
id="progressInput"
type="range"
min="0"
max="100"
step="1"
value={this.state.percentage}
onChange={this.handleChangeEvent}/>
</div>
</div>
);
}
}
#progressInput {
margin: 20px auto;
width: 30%;
}
.circle-background,
.circle-progress {
fill: none;
}
.circle-background {
stroke: #ddd;
}
.circle-progress {
stroke: red;
stroke-linecap: round;
stroke-linejoin: round;
}
.circle-text {
font-size: 3em;
font-weight: bold;
fill: red;
}
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