@renderlesskit/react/dist/esm/disclosure/helpers.js

Collection of headless components/hooks that are accessible, composable, customizable from low level to build your own UI & Design System powered by Reakit

import * as React from "react";
import { isSelfTarget } from "reakit-utils";
import { useSafeLayoutEffect } from "@chakra-ui/hooks";

function useLastValue(value) {
  var lastValue = React.useRef(null);
  useSafeLayoutEffect(() => {
    lastValue.current = value;
  }, [value]);
  return lastValue;
}

export var useAnimation = props => {
  var {
    visible
  } = props;
  var [animating, setAnimating] = React.useState(false);
  var lastVisible = useLastValue(visible);
  var visibleHasChanged = lastVisible.current != null && lastVisible.current !== visible;
  var [state, setState] = React.useState(null);
  var raf = React.useRef(0);

  if (!animating && visibleHasChanged) {
    // Sets animating to true when when visible is updated
    setAnimating(true);
  }

  React.useEffect(() => {
    // Double RAF is needed so the browser has enough time to paint the
    // default styles before processing the `data-enter` attribute. Otherwise
    // it wouldn't be considered a transition.
    // See https://github.com/reakit/reakit/issues/643
    raf.current = window.requestAnimationFrame(() => {
      raf.current = window.requestAnimationFrame(() => {
        if (visible) {
          setState("enter");
        } else if (animating) {
          setState("leave");
        } else {
          setState(null);
        }
      });
    });
    return () => window.cancelAnimationFrame(raf.current);
  }, [visible, animating]);
  var stopAnimation = React.useCallback(() => setAnimating(false), []);
  var onEnd = React.useCallback(event => {
    if (!isSelfTarget(event)) return;
    if (!animating) return; // Ignores number animated

    stopAnimation();
  }, [animating, stopAnimation]);
  return {
    state,
    animating,
    onEnd
  };
};
export function getElementHeight(el) {
  if (!(el !== null && el !== void 0 && el.current)) {
    return "auto";
  }

  return el.current.scrollHeight;
}
export function getElementWidth(el) {
  if (!(el !== null && el !== void 0 && el.current)) {
    return "auto";
  }

  return el.current.scrollWidth;
} // https://github.com/mui-org/material-ui/blob/da362266f7c137bf671d7e8c44c84ad5cfc0e9e2/packages/material-ui/src/styles/transitions.js#L89-L98

export function getAutoSizeDuration(size) {
  if (!size || typeof size === "string") {
    return 0;
  }

  var constant = size / 36; // https://www.wolframalpha.com/input/?i=(4+%2B+15+*+(x+%2F+36+)+**+0.25+%2B+(x+%2F+36)+%2F+5)+*+10

  return Math.round((4 + 15 * constant ** 0.25 + constant / 5) * 10);
}
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