one/dist/esm/useBlocker.mjs

One is a new React Framework that makes Vite serve both native and web.

import * as React from "react";
import { Platform } from "react-native-web";
let currentLocation = typeof window !== "undefined" ? window.location.pathname + window.location.search : "";
let isBlocking = false;
let isProceeding = false;
let pendingNavigation = null;
const blockerCallbacks = /* @__PURE__ */new Map();
let listenersSetup = false;
function setupListeners() {
  if (listenersSetup || typeof window === "undefined") return;
  listenersSetup = true;
  currentLocation = window.location.pathname + window.location.search;
  window.addEventListener("popstate", () => {
    if (isProceeding) return;
    const nextLocation = window.location.pathname + window.location.search;
    for (const [, callbacks] of blockerCallbacks) {
      if (callbacks.shouldBlock()) {
        isBlocking = true;
        pendingNavigation = {
          previousLocation: currentLocation,
          nextLocation,
          historyAction: "pop"
        };
        window.history.go(1);
        callbacks.onBlock(pendingNavigation);
        return;
      }
    }
    currentLocation = nextLocation;
  });
  const originalPushState = window.history.pushState.bind(window.history);
  const originalReplaceState = window.history.replaceState.bind(window.history);
  window.history.pushState = function (state, title, url) {
    if (isProceeding || !url) {
      return originalPushState(state, title, url);
    }
    const nextLocation = typeof url === "string" ? url : url.toString();
    for (const [, callbacks] of blockerCallbacks) {
      if (callbacks.shouldBlock()) {
        isBlocking = true;
        pendingNavigation = {
          previousLocation: currentLocation,
          nextLocation,
          historyAction: "push"
        };
        callbacks.onBlock(pendingNavigation);
        return;
      }
    }
    currentLocation = nextLocation;
    return originalPushState(state, title, url);
  };
  window.history.replaceState = function (state, title, url) {
    if (isProceeding || !url) {
      return originalReplaceState(state, title, url);
    }
    const nextLocation = typeof url === "string" ? url : url.toString();
    for (const [, callbacks] of blockerCallbacks) {
      if (callbacks.shouldBlock()) {
        isBlocking = true;
        pendingNavigation = {
          previousLocation: currentLocation,
          nextLocation,
          historyAction: "replace"
        };
        callbacks.onBlock(pendingNavigation);
        return;
      }
    }
    currentLocation = nextLocation;
    return originalReplaceState(state, title, url);
  };
  window.addEventListener("beforeunload", event => {
    for (const [, callbacks] of blockerCallbacks) {
      if (callbacks.shouldBlock()) {
        event.preventDefault();
        event.returnValue = "";
        return;
      }
    }
  });
}
function useBlocker(shouldBlock) {
  const [state, setState] = React.useState("unblocked");
  const [blockedLocation, setBlockedLocation] = React.useState(null);
  const idRef = React.useRef(null);
  const shouldBlockRef = React.useRef(shouldBlock);
  shouldBlockRef.current = shouldBlock;
  React.useEffect(() => {
    if (Platform.OS !== "web" || typeof window === "undefined") return;
    setupListeners();
    const id = Symbol("blocker");
    idRef.current = id;
    blockerCallbacks.set(id, {
      shouldBlock: () => {
        const block = shouldBlockRef.current;
        if (typeof block === "function") {
          return block({
            currentLocation,
            nextLocation: pendingNavigation?.nextLocation || "",
            historyAction: pendingNavigation?.historyAction || "push"
          });
        }
        return block;
      },
      onBlock: pending => {
        setBlockedLocation(pending.nextLocation);
        setState("blocked");
      },
      onProceed: () => {
        setState("proceeding");
      },
      onReset: () => {
        setState("unblocked");
        setBlockedLocation(null);
      }
    });
    return () => {
      blockerCallbacks.delete(id);
    };
  }, []);
  const reset = React.useCallback(() => {
    isBlocking = false;
    pendingNavigation = null;
    setBlockedLocation(null);
    setState("unblocked");
  }, []);
  const proceed = React.useCallback(() => {
    if (!pendingNavigation) return;
    setState("proceeding");
    isProceeding = true;
    const pending = pendingNavigation;
    pendingNavigation = null;
    isBlocking = false;
    requestAnimationFrame(() => {
      if (pending.historyAction === "pop") {
        window.history.back();
      } else if (pending.historyAction === "push") {
        window.history.pushState(null, "", pending.nextLocation);
      } else {
        window.history.replaceState(null, "", pending.nextLocation);
      }
      currentLocation = pending.nextLocation;
      requestAnimationFrame(() => {
        isProceeding = false;
        setBlockedLocation(null);
        setState("unblocked");
      });
    });
  }, []);
  if (state === "unblocked") {
    return {
      state: "unblocked"
    };
  }
  if (state === "proceeding") {
    return {
      state: "proceeding",
      location: blockedLocation
    };
  }
  return {
    state: "blocked",
    reset,
    proceed,
    location: blockedLocation
  };
}
function checkBlocker(nextLocation, historyAction = "push") {
  if (Platform.OS !== "web" || typeof window === "undefined") {
    return false;
  }
  if (isProceeding) {
    return false;
  }
  for (const [, callbacks] of blockerCallbacks) {
    if (callbacks.shouldBlock()) {
      isBlocking = true;
      pendingNavigation = {
        previousLocation: currentLocation,
        nextLocation,
        historyAction
      };
      callbacks.onBlock(pendingNavigation);
      return true;
    }
  }
  return false;
}
export { checkBlocker, useBlocker };
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