Make the HMR WebSocket URL follow the page URL - #1218
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Thanks for looking into this and submitting a PR! This works for me locally.
One clarification: this setting controls the WebSocket URL used by the browser's HMR client; it does not bind the Vue dev server to 0.0.0.0. The server's bind address is controlled by --host / devServer.host, and remains set by --host ui in docker-compose.yml.
I've added a comment to the devServer.client.webSocketURL setting and updated the PR title and description to reflect this.
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Configure
devServer.client.webSocketURLas the specialauto://0.0.0.0:0/wsURL to make the HMR client derive the protocol, hostname, and port from the page loaded by the browser.This makes host-browser development connect to
ws://localhost:8081/ws, while containerized browser tests (e.g. Selenium) continue to reachhttp://ui:8081.Similar to #1207, this fixes the local HMR issue, but without causing CI to fail.
Validated locally:
ws://localhost:8081/ws.http://ui:8081.