I'm trying to make an SVG circular progress bar change color according to progress/percentage from a linear gradient using CSS and JavaScript (react too).
So far, every solution I find has hard coded color codes or using jQuery which I cannot use. My code and CSS is following.
<svg viewBox="0 0 36 36" className="circular-chart">
<path className="svg-back"
fill='none'
stroke={props.theme.colors.Neutral.Gray1}
strokeWidth={3}
d="M18 2.0845
a 15.9155 15.9155 0 0 1 0 31.831
a 15.9155 15.9155 0 0 1 0 -31.831"
/>
<path className="circle"
stroke-dasharray={`${props.percentage} 100`}
d="M18 2.0845
a 15.9155 15.9155 0 0 1 0 31.831
a 15.9155 15.9155 0 0 1 0 -31.831"
/>
<text
x={18}
y={21}
className="svg-circle-text">
{props.percentage}%
</text>
</svg>
CSS:
.svg-circle-text {
font-size: 0.5rem;
text-anchor: middle;
fill: ${theme.colors.Primary.Black}
font-weight: bold;
}
.circular-chart {
display: block;
margin: 10px auto;
max-width: 80%;
max-height: 250px;
}
.circle {
stroke: #99DA98;
fill: none;
stroke-width: 3;
stroke-linecap: round;
animation: progress 1s ease-out forwards;
}
@keyframes progress {
0% {
stroke-dasharray: 0 100;
}
}
In another component, I have the following background which serves as kind of a key to this circular progress bar:
background: linear-gradient(
90deg,
#99da98 0%,
#f8b66a 51.56%,
#cf6767 100%
);
So if the percentage is, say, 60%, it should show the value of the gradient at 60%. A little help would be appreciated. Thanks.
CodePudding user response:
So with the help of a comment left by A Haworth, I searched for rgb arithmetic solutions and found almost exactly what I required in this answer. hsl was also an option but rgb sounded simple enough. with some changes in the following code (from the other question) i was able to achieve what I wanted.
function getGreenToRed(percent){
r = percent<50 ? 255 : Math.floor(255-(percent*2-100)*255/100);
g = percent>50 ? 255 : Math.floor((percent*2)*255/100);
return 'rgb(' r ',' g ',0)';
}