There is not direct option like in main.config.js
but it’s really easy to disable.
Simply open /scripts/webpack-serve.js
and comment lines 151 to 153:
// custom event for change in the www/content folder
bs.watch(path.join(user.paths.www, 'content', '**/*')).on('change', (file) => {
instance.io.sockets.emit('kirby:contentupdate', { file: file })
})
becomes
// custom event for change in the www/content folder
// bs.watch(path.join(user.paths.www, 'content', '**/*')).on('change', (file) => {
// instance.io.sockets.emit('kirby:contentupdate', { file: file })
// })