gem-hunter
Language: JavaScript
A rollup plugin that injects code in the entry file. Can be used for legacy builds where you might want to add polyfills to the bundle.
🍣 A Rollup plugin which injects code into the entry modules at build time. Useful for adding polyfills to a legacy bundle, adding an environment configuration, etc.
This plugin requires an LTS Node version (v8.0.0+) and Rollup v1.20.0+.
Using npm:
npm install rollup-plugin-entry-code-injector --save-devCreate a rollup.config.js configuration file and import the plugin:
import { entryCodeInjector } from 'rollup-plugin-entry-code-injector'; export default { input: 'src/index.js', output: { dir: 'output', format: 'cjs' }, plugins: [entryCodeInjector()] };
Then call rollup either via the CLI or the API.
Type: String
Default: null
Code to be injected at the beginning of the entry module. It will be transformed by the rest of plugins provided in the rollup configurations as well.
// rollup.config.js
import { entryCodeInjector } from 'rollup-plugin-entry-code-injector';
export default {
input: 'main.js',
output: {
file: 'legacy.bundle.js',
format: 'cjs'
},
plugins: [
entryCodeInjector({
prepend: `
import 'regenerator-runtime/runtime';
`
})
]
}
Type: String
Default: null
Code to be injected at the end of the entry module. It will be transformed by the rest of plugins provided in the rollup configurations as well.
// rollup.config.js
import { entryCodeInjector } from 'rollup-plugin-entry-code-injector';
export default {
input: 'main.js',
output: {
file: 'bundle.js',
format: 'cjs'
},
plugins: [
entryCodeInjector({
append: `
/**
* Write some amazing things to be appended here...
*/
`
})
]
}
Type: Function
Default: null
Method to be used to transform the entry module code. This method will receive all the entry code as the first argument and should return a string to be written to the entry module file.
The generated code will be transformed by the rest of plugins provided in the rollup configurations as well.
// rollup.config.js
import { entryCodeInjector } from 'rollup-plugin-entry-code-injector';
export default {
input: 'main.js',
output: {
file: 'bundle.js',
format: 'cjs'
},
plugins: [
entryCodeInjector({
transformer: function(code) {
/**
* Do some code processing here...
*/
return code;
}
})
]
}