能否通过Graph API邀请好友参加活动？及外部窗口选未关联好友方案咨询

Great questions—let’s break these down clearly based on current Facebook Platform policies and tooling:

Short answer: No, not for inviting users who haven’t connected to your web app.

Facebook’s Graph API has tightened privacy restrictions over recent years. The user_friends permission (once used to access a user’s full friend list) now only returns friends who have already authorized your app. Additionally, there’s no Graph API endpoint that lets you directly send event invites to non-connected users—this is intentional to prevent spam and protect user privacy.

The only exception is niche use cases like game app invites (via the apprequests endpoint), but even that is limited to game-specific scenarios and doesn’t apply to general event invites.

Yes, this is absolutely possible and the recommended approach! Instead of trying to handle invites via the Graph API, you can use Facebook’s official Share Dialog or Send Dialog—these are pre-built modal windows hosted by Facebook that let users select any of their friends (including those who haven’t connected to your app) and send them an event link or invitation message.

The best part? You don’t need special permissions to use these dialogs, because all the friend selection happens within Facebook’s own interface (you never access the user’s friend list directly, which complies with privacy rules).

Here’s a quick example of how to implement the Send Dialog using the Facebook JavaScript SDK:

// Initialize the SDK first (make sure you've loaded it properly)
FB.ui({
  method: 'send',
  link: 'https://your-event-url.com',
  message: 'Hey, join me at this awesome event!'
}, function(response) {
  // Handle the response (e.g., check if the user sent the invite)
  if (response && !response.error_message) {
    console.log('Invite sent successfully!');
  }
});

When the user triggers this code, a Facebook modal will open where they can pick friends, add a custom message, and send the invite. The recipient will get a notification or message with your event link—no need for them to have your app installed or authorized.

内容的提问来源于stack exchange，提问作者Sewer