Esbuild Dynamic Import

Features

-Transforms dynamic imports that contain a template string variable into static imports to be processed by esbuild

-Rewrites dynamic imports of js files that contain a template string variable to use absolute path instead

Install

npm i @rtvision/esbuild-dynamic-import

I know this was working using the version 0.13.14 of esbuild. It may work for earlier versions depending on when the plugin system was implemented

Example Usage

import DynamicImport from '@rtvision/esbuild-dynamic-import';
DynamicImport({ transformExtensions: ['.vue'], changeRelativeToAbsolute: true, filter: /src\/.*\.js$/ }),

Parameters

transformExtensions

Transforms all dynamic imports that contain a template varable and the imported file extension is included in transformExtensions. I.E. import(``../../${file}.vue``) All imports found will be turned into static imports of every possible valid import it could be. It then uses the static imports instead of node dynamically importing the file at runtime

My use case for this was I wanted esbuild to process the possible imports that are .vue (SFC vue) files so they can be processed by the EsbuildVue plugin and made into valid javascript that nodejs can run.

changeRelativeToAbsolute

If there exists a dynamic import like import(``../../${file}.js``) then that in theory could be resolved at runtime just fine by nodejs. The main issue is that the relative file path is now different due to the bundled file produced by esbuild being in a likely different file location. changeRelativeToAbsolute will fix this issue by changing all relative dynamic imports that contain a template literal variable to absolute ones.

For my use case dynamic imports while using vite are needed to be relative for production builds especially since Rollup is currently used and Rollup requires all dynamic imports to be relative.

Filter

The Filter parameter is used to reduce the scope of the file search.

I set it to just search our local source directory, but by default it will search through every js file that is not marked as external

Loader

Need to specify if you need one of esbuild's internal loaders to transform the file after the dynamic imports are handled by this plugin. i.e. if your filter is /.jsx$/ then you need to specify jsx as your loader

License

MIT © RtVision