What is the `heartbeat_send` filter in WordPress and how does it enable real-time server communication?

WordPress Expert Medium

WordPress Expert — Medium

What is the `heartbeat_send` filter in WordPress and how does it enable real-time server communication?

Key points

  • `heartbeat_send` filter adds data to Heartbeat AJAX responses
  • Enables real-time server communication
  • Works in conjunction with other Heartbeat functions
  • Facilitates lightweight polling-based features

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