beautiful-react-hooks/useOnlineState.js

A collection of beautiful (and hopefully useful) React hooks to speed-up your components and hooks development

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var react_1 = require("react");
var useGlobalEvent_1 = __importDefault(require("./useGlobalEvent"));
var warnOnce_1 = __importDefault(require("./shared/warnOnce"));
/**
 * Uses the [Navigator online API](https://developer.mozilla.org/en-US/docs/Web/API/NavigatorOnLine/onLine) to define
 * whether the browser is connected or not.
 */
var useOnlineState = function () {
    /**
     * If the browser doesn't support the `navigator.onLine` state, the hook will always return true
     * assuming the app is already online.
     */
    var isSupported = typeof window !== 'undefined' && 'ononline' in window;
    var _a = (0, react_1.useState)(isSupported ? navigator.onLine : true), isOnline = _a[0], setIsOnline = _a[1];
    var whenOnline = (0, useGlobalEvent_1.default)('online', { capture: true });
    var whenOffline = (0, useGlobalEvent_1.default)('offline', { capture: true });
    if (!isSupported) {
        (0, warnOnce_1.default)('The current device does not support the \'online/offline\' events, you should avoid using useOnlineState');
        return isOnline;
    }
    whenOnline(function () {
        setIsOnline(true);
    });
    whenOffline(function () {
        setIsOnline(false);
    });
    return isOnline;
};
exports.default = useOnlineState;