one/dist/esm/views/LoadProgressBar.mjs

One is a React framework for web, iOS, and Android apps.

import * as React from "react";
import { router } from "../router/imperative-api.mjs";
import { jsx } from "react/jsx-runtime";

const LoadProgressBar = ({ startDelay = 500, finishDelay = 50, initialPercent = 20, updateInterval = 300, sporadicness = 3, style, onLayout, ...props }) => {
	const [loaded, setLoaded] = React.useState(0);
	const [width, setWidth] = React.useState(0);
	const elementRef = React.useRef(null);
	React.useEffect(() => {
		let loadInterval;
		const dispose = router.onLoadState((state) => {
			clearTimeout(loadInterval);
			switch (state) {
				case "loading": {
					loadInterval = setTimeout(() => {
						setLoaded(initialPercent);
						let intervalCount = 0;
						loadInterval = setInterval(() => {
							intervalCount++;
							if (intervalCount % sporadicness === 0) {
								return;
							}
							setLoaded((previous) => {
								const increment = (100 - previous) * (previous > 80 ? .05 : .1) * Math.random();
								return Math.min(previous + increment, 100);
							});
						}, updateInterval);
					}, startDelay);
					break;
				}
				case "loaded": {
					setLoaded(100);
					clearInterval(loadInterval);
					setTimeout(() => {
						setLoaded(0);
					}, finishDelay);
					break;
				}
			}
		});
		return () => {
			dispose();
			clearInterval(loadInterval);
		};
	}, [
		finishDelay,
		initialPercent,
		sporadicness,
		startDelay,
		updateInterval
	]);
	React.useEffect(() => {
		const element = elementRef.current;
		if (!element) return;
		const updateLayout = () => {
			const rect = element.getBoundingClientRect();
			setWidth(rect.width);
			onLayout?.({ nativeEvent: { layout: {
				x: rect.x,
				y: rect.y,
				width: rect.width,
				height: rect.height
			} } });
		};
		updateLayout();
		const observer = new ResizeObserver(updateLayout);
		observer.observe(element);
		return () => observer.disconnect();
	}, [onLayout]);
	const flattenedStyle = React.useMemo(() => {
		const styleValue = style;
		const styleValues = Array.isArray(styleValue) ? styleValue.flat(Number.POSITIVE_INFINITY) : [styleValue];
		return styleValues.reduce((result, value) => value && typeof value === "object" ? Object.assign(result, value) : result, {});
	}, [style]);
	return /* @__PURE__ */ jsx("div", {
		...props,
		ref: elementRef,
		style: {
			display: loaded === 0 ? "none" : "flex",
			height: 1,
			position: "fixed",
			top: 0,
			left: 0,
			right: 0,
			backgroundColor: "rgba(60, 100, 200, 0.65)",
			width: "100%",
			transform: `translateX(${-(1 - loaded * .01) * width}px)`,
			zIndex: Number.MAX_SAFE_INTEGER,
			...flattenedStyle
		}
	});
};

export { LoadProgressBar };
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