expo-router/build/fork/useBackButton.native.js

Expo Router is a file-based router for React Native and web applications.

/**
 * This file is unchanged, except for removing eslint comments
 */ "use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
Object.defineProperty(exports, "useBackButton", {
    enumerable: true,
    get: function() {
        return useBackButton;
    }
});
function _react() {
    const data = /*#__PURE__*/ _interop_require_wildcard(require("react"));
    _react = function() {
        return data;
    };
    return data;
}
function _reactnative() {
    const data = require("react-native");
    _reactnative = function() {
        return data;
    };
    return data;
}
const _native = require("../react-navigation/native");
function _getRequireWildcardCache(nodeInterop) {
    if (typeof WeakMap !== "function") return null;
    var cacheBabelInterop = new WeakMap();
    var cacheNodeInterop = new WeakMap();
    return (_getRequireWildcardCache = function(nodeInterop) {
        return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
    })(nodeInterop);
}
function _interop_require_wildcard(obj, nodeInterop) {
    if (!nodeInterop && obj && obj.__esModule) {
        return obj;
    }
    if (obj === null || typeof obj !== "object" && typeof obj !== "function") {
        return {
            default: obj
        };
    }
    var cache = _getRequireWildcardCache(nodeInterop);
    if (cache && cache.has(obj)) {
        return cache.get(obj);
    }
    var newObj = {
        __proto__: null
    };
    var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor;
    for(var key in obj){
        if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) {
            var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null;
            if (desc && (desc.get || desc.set)) {
                Object.defineProperty(newObj, key, desc);
            } else {
                newObj[key] = obj[key];
            }
        }
    }
    newObj.default = obj;
    if (cache) {
        cache.set(obj, newObj);
    }
    return newObj;
}
function useBackButton(ref) {
    _react().useEffect(()=>{
        const subscription = _reactnative().BackHandler.addEventListener('hardwareBackPress', ()=>{
            const navigation = ref.current;
            if (navigation == null) {
                return false;
            }
            if (navigation.canGoBack()) {
                navigation.dispatchSync(_native.CommonActions.goBack());
                return true;
            }
            return false;
        });
        return ()=>subscription.remove();
    }, [
        ref
    ]);
}

//# sourceMappingURL=useBackButton.native.js.map