@ant-design/x-markdown/es/XMarkdown/AnimationText.js

placeholder for @ant-design/x-markdown

import React, { useEffect, useMemo, useRef, useState } from 'react';
const AnimationText = /*#__PURE__*/React.memo(props => {
  const {
    text,
    animationConfig
  } = props;
  const {
    fadeDuration = 200,
    easing = 'ease-in-out'
  } = animationConfig || {};
  const [chunks, setChunks] = useState([]);
  const prevTextRef = useRef('');
  useEffect(() => {
    if (text === prevTextRef.current) return;
    if (!(prevTextRef.current && text.indexOf(prevTextRef.current) === 0)) {
      setChunks([text]);
      prevTextRef.current = text;
      return;
    }
    const newText = text.slice(prevTextRef.current.length);
    if (!newText) return;
    setChunks(prev => [...prev, newText]);
    prevTextRef.current = text;
  }, [text]);
  const animationStyle = useMemo(() => ({
    animation: `x-markdown-fade-in ${fadeDuration}ms ${easing} forwards`
  }), [fadeDuration, easing]);
  return /*#__PURE__*/React.createElement(React.Fragment, null, chunks.map((text, index) => /*#__PURE__*/React.createElement("span", {
    style: animationStyle,
    key: `animation-text-${index}`
  }, text)));
});
export default AnimationText;