Typescript's tree-pruning strategy design for optimization

Question

Typescript's tree-pruning strategy design for optimization

I've been working on developing a library that enforces the use of specific strategies for each target. The current structure I have in place is as follows:

[Application] -> contains -> [player] -> contains -> [renderer]

In the current setup, Renderer is an interface that needs to be swapped out for different platforms:

Mobile -> uses MobileRenderer
Web -> uses WebRenderer

I have flexibility in choosing bundlers - currently utilizing Webpack for the app and Rollup for the lib - and here's what I've managed to achieve:

My library exports a Player interface and a createPlayer function which returns a PlayerInterface. On the application side, there's a Webpack alias set up to resolve the correct platform library based on the build input.

For example:

import { createPlayer } from "my-lib";

const player = createPlayer()

We then run the application build with

npm run build --platform=web

Webpack will then convert the my-lib import into my-lib/platforms/web, which includes the exported createPlayer function utilizing the right renderer.

My query is, how can we ensure, from the application's perspective, that we are importing the correct renderer per platform during build time while still enabling tree-shaking (and only including necessary sources)? Using the build system for this purpose seems somewhat convoluted, as it lacks transparency into the process.

Is there a more efficient approach to handle this?

Regards,

javascript typescript npm webpack

Answer 1

Answer №1

There are a few different paths you can take. I would advise against implementing a compile-time switch, as it may result in the need to distribute multiple versions of your library, which goes against common practices. However, if you absolutely must do this, consider utilizing webpack's ProvidePlugin or resolve.alias configuration options to dynamically link your code to the appropriate renderer during the build process.

Another approach could be to offer two entry points for your application and let the user select which one to use. This method is reminiscent of how react-dom handles browser rendering versus server rendering by providing options like react-dom and react-dom/server:

// index.js

export * from './shared';
export {default as renderer} from './renderers/web';

// mobile/index.js

export * from '../shared';
export {default as renderer} from '../renderers/mobile';

In this setup, users of your library can choose between

import {renderer, foo} from 'your-lib'

and

import {renderer, foo} from 'your-lib/mobile'

.

Both of these approaches involve decisions made at build time.

Although the second option typically requires explicitly specifying the version of the library in use, webpack's resolve.alias setting allows for redirects from imports of your-lib to your-lib/mobile.

Answer 2

There are a few different paths you can take. I would advise against implementing a compile-time switch, as it may result in the need to distribute multiple versions of your library, which goes against common practices. However, if you absolutely must do this, consider utilizing webpack's ProvidePlugin or resolve.alias configuration options to dynamically link your code to the appropriate renderer during the build process.

Another approach could be to offer two entry points for your application and let the user select which one to use. This method is reminiscent of how react-dom handles browser rendering versus server rendering by providing options like react-dom and react-dom/server:

// index.js

export * from './shared';
export {default as renderer} from './renderers/web';

// mobile/index.js

export * from '../shared';
export {default as renderer} from '../renderers/mobile';

In this setup, users of your library can choose between

import {renderer, foo} from 'your-lib'

and

import {renderer, foo} from 'your-lib/mobile'

.

Both of these approaches involve decisions made at build time.

Although the second option typically requires explicitly specifying the version of the library in use, webpack's resolve.alias setting allows for redirects from imports of your-lib to your-lib/mobile.

Typescript's tree-pruning strategy design for optimization

Answer №1

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