mirror of https://github.com/zulip/zulip.git
42 lines
1.9 KiB
Markdown
42 lines
1.9 KiB
Markdown
# Verify that your message has been succesfully sent
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When you send a message in a chat tool, depending on where you are
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located in relation to the relevant server, it can take a few hundred
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milliseconds for your message to transmitted to the server, stored,
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and transmitted to active clients by the server. Like most other chat
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tools, Zulip optimizes the experience for the sender by "locally
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echoing" the message, i.e. displaying it in your Zulip feed
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immediately, even though your browser may only get confirmation that
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the message was received by the server a few hundred milliseconds
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later.
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In Zulip, locally echoed messages are displayed without a visible
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timestamp, so that (for debugging purposes) one can visually tell them
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apart from messages that have been confirmed by the server. Once the
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client is able to deliver the message to the server, and the server
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confirms receipt of the message, Zulip rerenders the message to
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display the timestamp. You can see this in action by using the
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following procedure:
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1. Disconnect your computer from the Internet.
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2. Send a message by following the instructions located
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[here](/help/send-a-stream-message) for public streams or
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[here](/help/send-a-private-message) for private messages.
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3. After you send your message, it will appear below all the previous
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messages, but with no timestamp. If the browser gets an error from
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the server or otherwise cannot confirm receipt, it will report an
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error in your browser window.
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4. Reconnect your computer to the Internet.
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5. A few seconds later, your message will be updated to contain the
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timestamp on the right side of the message body.
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Zulip is designed to store locally echoed message content in local
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storage and replay it when your browser reconnects to the Internet, to
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avoid issues where messages users thought they sent are lost.
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