@nutui/nutui-react/dist/esm/Progress.js

京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序

import { _ as __rest } from "./tslib.es6.js";
import React__default, { useState, useEffect, useRef } from "react";
import classNames from "classnames";
import { C as ComponentDefaults } from "./typings.js";
import { a as useRtl } from "./configprovider2.js";
const defaultProps = Object.assign(Object.assign({}, ComponentDefaults), { percent: 0, showText: false, animated: false, lazy: false, delay: 0 });
const Progress = (props) => {
  const rtl = useRtl();
  const _a = Object.assign(Object.assign({}, defaultProps), props), { className, style, percent, background, color, strokeWidth, showText, animated, children, lazy, delay } = _a, rest = __rest(_a, ["className", "style", "percent", "background", "color", "strokeWidth", "showText", "animated", "children", "lazy", "delay"]);
  const classPrefix = "nut-progress";
  const classesInner = classNames({
    [`${classPrefix}-inner`]: true,
    [`${classPrefix}-active`]: animated
  });
  const stylesOuter = {
    height: `${strokeWidth}px`,
    background
  };
  const [displayPercent, setDispalyPercent] = useState(0);
  const stylesInner = {
    width: `${displayPercent}%`,
    background: color
  };
  useEffect(() => {
    setDispalyPercent(percent);
  }, [percent]);
  const [intersecting, setIntersecting] = useState(false);
  const progressRef = useRef(null);
  const observer = useRef(null);
  const initObserver = () => {
    const options = {
      threshold: [0],
      rootMargin: "0px"
    };
    observer.current = new IntersectionObserver((entires, self) => {
      entires.forEach((item) => {
        setIntersecting(item.isIntersecting);
      });
    }, options);
    observer.current.observe(progressRef.current);
  };
  const resetObserver = () => {
    observer.current.disconnect && observer.current.disconnect();
  };
  useEffect(() => {
    if (lazy) {
      setTimeout(() => {
        if (intersecting) {
          setDispalyPercent(percent);
        } else {
          setDispalyPercent(0);
        }
      }, delay);
    }
  }, [intersecting]);
  useEffect(() => {
    lazy && initObserver();
    let timer = null;
    if (delay) {
      setDispalyPercent(0);
      timer = setTimeout(() => {
        setDispalyPercent(percent);
      }, delay);
    }
    return () => {
      lazy && resetObserver();
      timer && clearTimeout(timer);
    };
  }, []);
  return React__default.createElement(
    "div",
    Object.assign({ ref: progressRef, className: classNames(classPrefix, className), style }, rest),
    React__default.createElement(
      "div",
      { className: `${classPrefix}-outer`, style: stylesOuter },
      React__default.createElement("div", { className: classesInner, style: stylesInner }, showText && React__default.createElement("div", { className: `${classPrefix}-text`, style: rtl ? { right: `${displayPercent}%` } : { left: `${displayPercent}%` } }, children || React__default.createElement(
        "div",
        { className: `${classPrefix}-text-inner`, style: {
          background: color
        } },
        percent,
        "%"
      )))
    )
  );
};
Progress.displayName = "NutProgress";
export {
  Progress as default
};