@wordpress/compose/build-module/hooks/use-focus-outside/index.js

WordPress higher-order components (HOCs).

// packages/compose/src/hooks/use-focus-outside/index.ts
import { useCallback, useEffect, useRef } from "@wordpress/element";
var INPUT_BUTTON_TYPES = ["button", "submit"];
function isFocusNormalizedButton(eventTarget) {
  if (!(eventTarget instanceof window.HTMLElement)) {
    return false;
  }
  switch (eventTarget.nodeName) {
    case "A":
    case "BUTTON":
      return true;
    case "INPUT":
      return INPUT_BUTTON_TYPES.includes(
        eventTarget.type
      );
  }
  return false;
}
function useFocusOutside(onFocusOutside) {
  const currentOnFocusOutsideRef = useRef(onFocusOutside);
  useEffect(() => {
    currentOnFocusOutsideRef.current = onFocusOutside;
  }, [onFocusOutside]);
  const preventBlurCheckRef = useRef(false);
  const blurCheckTimeoutIdRef = useRef();
  const cancelBlurCheck = useCallback(() => {
    clearTimeout(blurCheckTimeoutIdRef.current);
  }, []);
  useEffect(() => {
    if (!onFocusOutside) {
      cancelBlurCheck();
    }
  }, [onFocusOutside, cancelBlurCheck]);
  const normalizeButtonFocus = useCallback((event) => {
    const { type, target } = event;
    const isInteractionEnd = ["mouseup", "touchend"].includes(type);
    if (isInteractionEnd) {
      preventBlurCheckRef.current = false;
    } else if (isFocusNormalizedButton(target)) {
      preventBlurCheckRef.current = true;
    }
  }, []);
  const queueBlurCheck = useCallback((event) => {
    event.persist();
    if (preventBlurCheckRef.current) {
      return;
    }
    const ignoreForRelatedTarget = event.target.getAttribute(
      "data-unstable-ignore-focus-outside-for-relatedtarget"
    );
    if (ignoreForRelatedTarget && event.relatedTarget?.closest(ignoreForRelatedTarget)) {
      return;
    }
    blurCheckTimeoutIdRef.current = setTimeout(() => {
      if (!document.hasFocus()) {
        event.preventDefault();
        return;
      }
      if ("function" === typeof currentOnFocusOutsideRef.current) {
        currentOnFocusOutsideRef.current(event);
      }
    }, 0);
  }, []);
  return {
    onFocus: cancelBlurCheck,
    onMouseDown: normalizeButtonFocus,
    onMouseUp: normalizeButtonFocus,
    onTouchStart: normalizeButtonFocus,
    onTouchEnd: normalizeButtonFocus,
    onBlur: queueBlurCheck
  };
}
export {
  useFocusOutside as default
};
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