435bf65784
Warn users and revert their `devtool` when they manually change the `devtool` in development mode. For this addition, I check to ensure the `devtool` is custom (i.e. different than what is set by Next) and has a value (`false` is fine as a custom `devtool`!). As described in [this issue (13963)](https://github.com/vercel/next.js/issues/13963), changing the `devtool` in development mode can cause issues with performance. Fixes #13963
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588 B
Improper webpack devtool used in development mode
Why This Error Occurred
Next.js chooses the most optimal devtool for use with webpack. Changing the devtool in development mode will cause severe performance regressions with your application.
Possible Ways to Fix It
Please remove the custom devtool override or only apply it to production builds in your next.config.js.
module.exports = {
webpack: (config, options) => {
if (!options.dev) {
config.devtool = options.isServer ? false : 'your-custom-devtool'
}
return config
},
}