Replace rollup-plugin-dts with @rollup/plugin-typescript

[JayaKrishnaNamburu]

Currently, i see the types are being rolled up using rollup-plugin-dts

tailwind-merge/scripts/rollup.config.mjs

Lines 74 to 89 in 206330e

	{
	input: 'dist/index.d.ts',
	output: {
	file: pkg.exports['.'].types,
	format: 'esm',
	},
	plugins: [
	dts(),
	del({
	targets: ['dist/lib', 'dist/index.d.ts'],
	hook: 'buildEnd',
	runOnce: true,
	}),
	],
	},
	])

The issue i am currently facing is, the package merges all the types exports into a single file. As you can see in dist/types.d.ts file

export { type ClassNameValue, type ClassValidator, type Config, type DefaultClassGroupIds, type DefaultThemeGroupIds, type ExperimentalParseClassNameParam, type ExperimentalParsedClassName, createTailwindMerge, extendTailwindMerge, fromTheme, getDefaultConfig, mergeConfigs, twJoin, twMerge, validators_d as validators };

The thing is the syntax of type ClassNameValue and type ClassValidator works only in typescript versions higher than 4.3.0. So, when using in an older projects. The typescript compiler is breaking because typescript versions lower than 4.3 eg: 4.2.4 seems to bundle the types inside node_modules too and it's breaking.

[dcastil]

Hey @JayaKrishnaNamburu! 👋

I started using rollup-plugin-dts because there were people having issues with imports across .d.ts files (ESM / CJS differences), so I need to keep bundling the types into a single file.

I checked if there is an easy way to prevent the inline type keywords in the final bundle but that doesn't seem to be the case unfortunately. In case you'll find a way to bundle them differently so that it works in TypeScript <4.3, feel free to submit a PR. Otherwise you could also use patch-package in your repo to fix it, but then you'll need to keep the patch up to date with changing tailwind-merge versions.

[JayaKrishnaNamburu]

No problem, i can understand. It's too much to support all the possible use-cases lately with esm and cjs. I ended up upgrading the typescript. So, please free to close the discussion.