Webpack 5: devtool ValidationError, invalid configuration object

Question

While migrating from Webpack 4 to Webpack 5 I got an error when using devtool with empty value (only in production mode).

module.exports = {
             


        

Answer 1

Answer to own question! Spoiler: false.

module.exports = {
    devtool: isProd ? false : 'source-map',
}

In Webpack 4 it was possible to value this with an empty string. webpack 5 is more strict. Webpacks devtool configuration.