WebSockets·WebSockets essentials

Messages

Messages are text or binary frames.

Intermediate 10 min read Lesson 2 of 150 Challenge included
What you will be able to do
  • Check event.data.
  • Parse JSON defensively.
  • Validate on the server.

In plain English

Messages are text or binary frames.

  • Check event.data.
  • Parse JSON defensively.
  • Validate on the server.
messages.jsJavaScript
socket.addEventListener('message', (event) => {
  const data = JSON.parse(event.data)
  console.log(data.type)
})
Your turn

Explain it back

Easy

Answer from memory: What is event.data?

TEXT · starter
Your answer…
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Knowledge checkQuestion 1

What is event.data?

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