Next.js doesn't work properly in Safari

When I try to run my next app on Safari, I get this error in the console and it makes the app not function properly.

SyntaxError: Unexpected keyword 'const'. Const declarations are not supported in strict mode.

System information

• OS: macOS
• Browser: Safari Version 9.1.2 (11601.7.7)
• Version of Next.js: 6.1.0

Additional context

I’ve searched online and found the same issue with no solution, the only reasonable solution was to use babel.js - browser targets, however that breaks the app badly and it doesn’t even build.

[paschaldev]

Just leaving this here for anybody who stumbles upon this same issue. I added this to my next.config.js file and everything works fine on Safari, it no longer includes the const keyword.

webpack(config, options) {
	...
	config.module.rules.push(
		{
			test: /\.js$/,
			include: [
				/node_modules/
			],
			loader: 'babel-loader'
		}
	)
}

What this does is transpile every js file imported in our app with our babel configuration. Looks like a very lazy fix but solves the problem for me.

[timneutkens]

Or use next-cookies npmjs.com/next-cookies