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Bootstrap/build/rollup.config.js

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'use strict'
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const path = require('path')
const { babel } = require('@rollup/plugin-babel')
const { nodeResolve } = require('@rollup/plugin-node-resolve')
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const banner = require('./banner.js')
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const BUNDLE = process.env.BUNDLE === 'true'
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const ESM = process.env.ESM === 'true'
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let fileDest = `bootstrap${ESM ? '.esm' : ''}`
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const external = ['popper.js']
const plugins = [
babel({
// Only transpile our source code
exclude: 'node_modules/**',
// Include the helpers in the bundle, at most one copy of each
babelHelpers: 'bundled'
})
]
const globals = {
'popper.js': 'Popper'
}
if (BUNDLE) {
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fileDest += '.bundle'
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// Remove last entry in external array to bundle Popper
external.pop()
delete globals['popper.js']
plugins.push(nodeResolve())
}
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const rollupConfig = {
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input: path.resolve(__dirname, `../js/index.${ESM ? 'esm' : 'umd'}.js`),
output: {
banner,
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file: path.resolve(__dirname, `../dist/js/${fileDest}.js`),
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format: ESM ? 'esm' : 'umd',
globals
},
external,
plugins
}
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if (!ESM) {
rollupConfig.output.name = 'bootstrap'
}
module.exports = rollupConfig