WEBVTT

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Why does a localhost preview not open for someone else?

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Localhost refers back to the device making the request.

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Know where the preview is running.
6 local-preview basics.

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Localhost means this device
A loopback address points the request back to the local computer.
Current device · Local request · Loopback address

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127.0.0.1 is a common example
It is an IPv4 loopback address used for local services.
IPv4 loopback · Local computer · Local service

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A local server must be running
The preview needs the development service to be available.
Running preview service · Local application · Working request

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The port selects the service
A number after the hostname can identify the local service port.
Local hostname · Port number · Correct service

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Another device has its own local
Its localhost refers to that device, not your computer.
Different device · Different local service · No shared address

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Use an appropriate shared preview
Ask for a hosted preview or another agreed review method.
Shared preview URL · Suitable access · Actual production status

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Your checklist
Localhost means this device · 127.0.0.1 is a common example · A local server must be running · The port selects the service · Another device has its own local · Use an appropriate shared preview

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Use the correct shared preview when someone else needs to review.
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