React App：如何更新聊天应用中分享URL时显示的消息

Hey there! Let's walk through where you can adjust that URL preview message in your chat app. The location depends on whether the text is hardcoded in your components, injected via environment variables, or tied to your Webpack configuration:

1. Check Your Chat Component Code (Most Likely Spot) #

The message "website created using react app" is probably hardcoded in the component that handles URL previews or message rendering.

• Look for components related to chat messages (e.g., UrlPreview.js, MessageBubble.js, or a similar file in your src/components folder).
• Search the file for the exact string "website created using react app" — once you find it, replace it with your desired text.

2. Check Environment Variables #

If your app uses environment variables to inject this message:

• Open the .env file in your project root directory (create it if it doesn't exist).
• Look for a variable like REACT_APP_URL_PREVIEW_MESSAGE or something similar that holds the string. Update its value to your preferred message.
• Remember: Environment variables in Create React App-based projects need to start with REACT_APP_ to be accessible in your code.

3. Adjust Webpack Configuration (If Needed) #

If the message is being injected via Webpack's DefinePlugin (common in custom setups):

• If you haven't ejected your Create React App setup, you'll need to use a tool like craco to override the default Webpack config without ejecting.
• If you have ejected or are using a custom Webpack config (look for webpack.config.js in your project root or config folder), find the DefinePlugin section. You'll likely see a line like:

  'process.env.REACT_APP_URL_PREVIEW_MESSAGE': JSON.stringify('website created using react app')
  

  Update the string inside JSON.stringify() to your new message.
• Note: Avoid directly modifying files in node_modules/react-scripts (the default CRA config) since those changes will be overwritten when you update dependencies.

4. Third-Party Chat Library Configuration #

If you're using a pre-built chat library (like React Chat Engine, ChatKit, etc.) for your chat functionality:

• Check the library's built-in props or customization options for URL previews. You'll probably need to pass a custom render function or template prop to the library's message component to replace the default text.

内容的提问来源于stack exchange，提问作者Logan McNulty