react-preloader-icon
Version:
SVG loading icons component for React.
47 lines (46 loc) • 2.12 kB
JavaScript
import React, { useEffect, useRef } from 'react';
import loop from '../utils/loop';
var delayRates = [0, 0.3, 0.8, 0.1, 0.6, 0.4, 0.7, 0.5, 0.2];
function useBlinking(duration) {
var ref = useRef();
useEffect(function () {
var elements = ref.current.querySelectorAll('circle');
var cancels = [];
var _loop_1 = function (i, v) {
cancels[i] = loop({
duration: duration,
delay: duration * delayRates[i],
update: function (n) {
var progress = Math.abs(1 - n * 2);
elements[i].setAttribute('fill-opacity', String(0.2 + 0.8 * progress));
},
});
};
for (var i = 0, v = elements.length; i < v; i = i + 1) {
_loop_1(i, v);
}
return function () {
for (var i = 0, n = cancels.length; i < n; i = i + 1) {
cancels[i]();
}
};
}, [duration]);
return ref;
}
var Grid = function (_a) {
var strokeColor = _a.strokeColor, duration = _a.duration;
var ref = useBlinking(duration);
return (React.createElement("div", { className: "preloader-icon__grid" },
React.createElement("svg", { xmlns: "http://www.w3.org/2000/svg", viewBox: "0 0 100 100" },
React.createElement("g", { ref: ref, fill: strokeColor },
React.createElement("circle", { cx: "12", cy: "12", r: "12" }),
React.createElement("circle", { cx: "50", cy: "12", r: "12" }),
React.createElement("circle", { cx: "88", cy: "12", r: "12" }),
React.createElement("circle", { cx: "12", cy: "50", r: "12" }),
React.createElement("circle", { cx: "50", cy: "50", r: "12" }),
React.createElement("circle", { cx: "88", cy: "50", r: "12" }),
React.createElement("circle", { cx: "12", cy: "88", r: "12" }),
React.createElement("circle", { cx: "50", cy: "88", r: "12" }),
React.createElement("circle", { cx: "88", cy: "88", r: "12" })))));
};
export default Grid;