[Frontend/Encore] WebpackDevServer 4.0.0-rc.0 renamed the "firewall" option into "allowedHosts"

[emmanuelballery]

When installing @symfony/webpack-encore you'll get a front requirement for webpack-dev-server@^4.0.0-beta.0. The new 4.0.0-rc.0 release renamed the firewall option into allowedHosts (and changed the way it's configured)

See WebpackDevServer Changelog.

This documentation is not valid as of webpack-dev-server@^4.0.0-beta.0.

Encore
    .configureDevServerOptions(options => {
        options.allowedHosts = 'all';
    });

[javiereguiluz]

Emmanuel, thanks for reporting this error!

In #15544 we're trying to fix this, but instead of options.allowedHosts = 'all', we're using options.disableHostCheck = true. Does that look correct to you? Thanks!

[emmanuelballery]

I'm no expert in Webpack but it seems that disableHostCheck and allowedHosts were removed in 4.0.0-beta.0 in favor of firewall then firewall was renamed back to allowedHosts in 4.0.0-rc.0 ;

All in ^4 version ... a bit of a nightmare.

[emmanuelballery]

Also if you take a look at the PR regarding this change, they seem to move to the options.allowedHosts = 'all'; setting ;

[javiereguiluz]

Thanks for checking. This is truly confusing 😓