babel-plugin-lazy-require
Transform global require statements that run on module load to lazily evaluated statements that get evaluted when first accessed later on in the file.
This is particularly useful when you have modules that are only needed under certain conditions and when startup time and/or memory footprint are important.
Usage
To install:
npm install --save-dev babel-cli@6 babel-plugin-lazy-require
To run:
babel <your-code> --plugins babel-plugin-lazy-require
Example
Input
// Module is imported hereconst someModule = ; { // Module is only actually used here someModule;}
Output
const _someModule = initialized: false; const _imports = { if !_someModuleinitialized _someModulevalue = ; _someModuleinitialized = true; return _someModulevalue; } { // Module is imported and used here _importssomeModule;}