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Facebook Login in React Native 0.82+ — A Complete Guide for iOS & Android

Last updated: February 2026
React Native: 0.82.x (New Architecture)
Library: react-native-fbsdk-next v13.x
Facebook SDK: iOS 18.x / Android 18.x

This guide walks you through integrating Facebook Login into a modern React Native app using react-native-fbsdk-next. It covers everything from Facebook Developer Console setup to production-ready TypeScript code.

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import { useEffect, useState } from "react";

interface NetworkInformation extends EventTarget {
  downlink?: number;
  effectiveType?: "slow-2g" | "2g" | "3g" | "4g";
  rtt?: number;
  saveData?: boolean;
  onchange?: EventListener;
}

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import { useEffect, useState } from "react";

type UseTextSelectionReturn = {
  text: string;
  rects: DOMRect[];
  ranges: Range[];
  selection: Selection | null;
};

const getRangesFromSelection = (selection: Selection): Range[] => {

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<textarea name="" id="mentionInput" cols="60" rows="2"></textarea>
    <div id="mention-list">

    </div>