Convert build scripts to ESM (#38984)

8 files changed, 53 insertions, 43 deletions

diff --git a/build/banner.js b/build/banner.mjs
index a022f1c48..3fea93c8f 100644
--- a/build/banner.js
+++ b/build/banner.mjs
@@ -1,6 +1,11 @@
-'use strict'
+import fs from 'node:fs/promises'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
-const pkg = require('../package.json')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+
+const pkgJson = path.join(__dirname, '../package.json')
+const pkg = JSON.parse(await fs.readFile(pkgJson, 'utf8'))
 
 const year = new Date().getFullYear()
 
@@ -12,4 +17,4 @@ function getBanner(pluginFilename) {
   */`
 }
 
-module.exports = getBanner
+export default getBanner
diff --git a/build/build-plugins.js b/build/build-plugins.mjs
index b2833a3fb..77e63070c 100644
--- a/build/build-plugins.js
+++ b/build/build-plugins.mjs
@@ -6,13 +6,15 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
-'use strict'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { babel } from '@rollup/plugin-babel'
+import globby from 'globby'
+import { rollup } from 'rollup'
+import banner from './banner.mjs'
 
-const path = require('node:path')
-const rollup = require('rollup')
-const globby = require('globby')
-const { babel } = require('@rollup/plugin-babel')
-const banner = require('./banner.js')
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 const sourcePath = path.resolve(__dirname, '../js/src/').replace(/\\/g, '/')
 const jsFiles = globby.sync(`${sourcePath}/**/*.js`)
@@ -37,7 +39,7 @@ for (const file of jsFiles) {
 const build = async plugin => {
   const globals = {}
 
-  const bundle = await rollup.rollup({
+  const bundle = await rollup({
     input: plugin.src,
     plugins: [
       babel({
diff --git a/build/change-version.js b/build/change-version.mjs
index 9685df589..2a16f2f21 100644
--- a/build/change-version.js
+++ b/build/change-version.mjs
@@ -6,11 +6,12 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
-'use strict'
+import fs from 'node:fs/promises'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import globby from 'globby'
 
-const fs = require('node:fs').promises
-const path = require('node:path')
-const globby = require('globby')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 const VERBOSE = process.argv.includes('--verbose')
 const DRY_RUN = process.argv.includes('--dry') || process.argv.includes('--dry-run')
diff --git a/build/generate-sri.js b/build/generate-sri.mjs
index 2e2292475..e2b1554f1 100644
--- a/build/generate-sri.js
+++ b/build/generate-sri.mjs
@@ -9,12 +9,13 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
-'use strict'
+import crypto from 'node:crypto'
+import fs from 'node:fs'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import sh from 'shelljs'
 
-const crypto = require('node:crypto')
-const fs = require('node:fs')
-const path = require('node:path')
-const sh = require('shelljs')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 sh.config.fatal = true
 
@@ -52,9 +53,9 @@ for (const { file, configPropertyName } of files) {
       throw error
     }
 
-    const algo = 'sha384'
-    const hash = crypto.createHash(algo).update(data, 'utf8').digest('base64')
-    const integrity = `${algo}-${hash}`
+    const algorithm = 'sha384'
+    const hash = crypto.createHash(algorithm).update(data, 'utf8').digest('base64')
+    const integrity = `${algorithm}-${hash}`
 
     console.log(`${configPropertyName}: ${integrity}`)
 
diff --git a/build/postcss.config.js b/build/postcss.config.mjs
index 7f8186d10..7717cfc3f 100644
--- a/build/postcss.config.js
+++ b/build/postcss.config.mjs
@@ -1,12 +1,10 @@
-'use strict'
-
 const mapConfig = {
   inline: false,
   annotation: true,
   sourcesContent: true
 }
 
-module.exports = context => {
+export default context => {
   return {
     map: context.file.dirname.includes('examples') ? false : mapConfig,
     plugins: {
diff --git a/build/rollup.config.js b/build/rollup.config.mjs
index f01918ebf..dd6c7d13e 100644
--- a/build/rollup.config.js
+++ b/build/rollup.config.mjs
@@ -1,15 +1,17 @@
-'use strict'
+import path from 'node:path'
+import process from 'node:process'
+import { fileURLToPath } from 'node:url'
+import { babel } from '@rollup/plugin-babel'
+import { nodeResolve } from '@rollup/plugin-node-resolve'
+import replace from '@rollup/plugin-replace'
+import banner from './banner.mjs'
 
-const path = require('node:path')
-const { babel } = require('@rollup/plugin-babel')
-const { nodeResolve } = require('@rollup/plugin-node-resolve')
-const replace = require('@rollup/plugin-replace')
-const banner = require('./banner.js')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 const BUNDLE = process.env.BUNDLE === 'true'
 const ESM = process.env.ESM === 'true'
 
-let fileDestination = `bootstrap${ESM ? '.esm' : ''}`
+let destinationFile = `bootstrap${ESM ? '.esm' : ''}`
 const external = ['@popperjs/core']
 const plugins = [
   babel({
@@ -24,7 +26,7 @@ const globals = {
 }
 
 if (BUNDLE) {
-  fileDestination += '.bundle'
+  destinationFile += '.bundle'
   // Remove last entry in external array to bundle Popper
   external.pop()
   delete globals['@popperjs/core']
@@ -41,7 +43,7 @@ const rollupConfig = {
   input: path.resolve(__dirname, `../js/index.${ESM ? 'esm' : 'umd'}.js`),
   output: {
     banner: banner(),
-    file: path.resolve(__dirname, `../dist/js/${fileDestination}.js`),
+    file: path.resolve(__dirname, `../dist/js/${destinationFile}.js`),
     format: ESM ? 'esm' : 'umd',
     globals,
     generatedCode: 'es2015'
@@ -54,4 +56,4 @@ if (!ESM) {
   rollupConfig.output.name = 'bootstrap'
 }
 
-module.exports = rollupConfig
+export default rollupConfig
diff --git a/build/vnu-jar.js b/build/vnu-jar.mjs
index 22956cb7e..b66356032 100644
--- a/build/vnu-jar.js
+++ b/build/vnu-jar.mjs
@@ -6,10 +6,8 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
-'use strict'
-
-const { execFile, spawn } = require('node:child_process')
-const vnu = require('vnu-jar')
+import { execFile, spawn } from 'node:child_process'
+import vnu from 'vnu-jar'
 
 execFile('java', ['-version'], (error, stdout, stderr) => {
   if (error) {
diff --git a/build/zip-examples.js b/build/zip-examples.mjs
index 7378c33c1..6b44d45b1 100644
--- a/build/zip-examples.js
+++ b/build/zip-examples.mjs
@@ -7,12 +7,15 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
-'use strict'
+import fs from 'node:fs/promises'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import sh from 'shelljs'
 
-const path = require('node:path')
-const sh = require('shelljs')
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
-const pkg = require('../package.json')
+const pkgJson = path.join(__dirname, '../package.json')
+const pkg = JSON.parse(await fs.readFile(pkgJson, 'utf8'))
 
 const versionShort = pkg.config.version_short
 const distFolder = `bootstrap-${pkg.version}-examples`