eslint flat-config support

[nikolaiessel]

I`m already using the new eslint flat-config fomat.

It seems this is actually not supported by fast-serve?

OoB I get the same error as in #126.
If I add the following to the transformConfig:

	initialWebpackConfig.plugins.forEach(plugin =>
	{
		if (plugin.constructor.name === "ESLintWebpackPlugin")
		{
			plugin.options.configType = "flat";
			plugin.options.eslintPath = "eslint/use-at-your-own-risk";
		}
	});

I get still an error: ERROR in ESLint is not a constructor

It seems included Eslint/Plugin versions are to old to support this config-type?

[s-KaiNet]

It seems included Eslint/Plugin versions are to old to support this config-type?

Yes, and the short answer is that we have to wait SPFx 1.19 release to use flat configs with fast-serve.

Currently, I cannot do anything with that, because flat-configs were introduced in eslint-webpack-plugin@4.1.0, but 4.1.0 supports webpack 5 only, while the latest released SPFx 1.18 is based on webpack 4.

In SPFx 1.19 beta webpack 5 was introduced and I already added support for 4.1.0 eslint plugin in next fast-serve beta.