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babel.config.js
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babel.config.js
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const path = require('path');
const errorCodesPath = path.resolve(__dirname, './docs/public/static/error-codes.json');
const missingError = process.env.MUI_EXTRACT_ERROR_CODES === 'true' ? 'write' : 'annotate';
const defaultAlias = {
'@svelte-mui/core': './packages/material-ui/src/js'
};
const productionPlugins = [
];
module.exports = function getBabelConfig(api) {
const useESModules = api.env(['legacy', 'modern', 'stable']);
const presets = [
[
'@babel/preset-env',
{
bugfixes: true,
browserslistEnv: process.env.BABEL_ENV || process.env.NODE_ENV,
debug: process.env.MUI_BUILD_VERBOSE === 'true',
modules: useESModules ? false : 'commonjs',
shippedProposals: api.env('modern'),
},
],
];
const plugins = [
[
'babel-plugin-macros',
{
muiError: {
errorCodesPath,
missingError,
},
},
],
'babel-plugin-optimize-clsx',
// Need the following 3 proposals for all targets in .browserslistrc.
// With our usage the transpiled loose mode is equivalent to spec mode.
['@babel/plugin-proposal-class-properties', { loose: true }],
['@babel/plugin-proposal-private-methods', { loose: true }],
['@babel/plugin-proposal-object-rest-spread', { loose: true }],
[
'@babel/plugin-transform-runtime',
{
useESModules,
// any package needs to declare 7.4.4 as a runtime dependency. default is ^7.0.0
version: '^7.4.4',
},
],
];
if (process.env.NODE_ENV === 'production') {
plugins.push(...productionPlugins);
}
return {
presets,
plugins,
ignore: [/@babel[\\|/]runtime/], // Fix a Windows issue.
env: {
coverage: {
plugins: [
'babel-plugin-istanbul',
[
'babel-plugin-module-resolver',
{
root: ['./'],
alias: defaultAlias,
},
],
],
},
development: {
plugins: [
[
'babel-plugin-module-resolver',
{
alias: {
modules: './modules',
},
},
],
],
},
legacy: {
plugins: [
// IE11 support
'@babel/plugin-transform-object-assign',
],
},
test: {
sourceMaps: 'both',
plugins: [
[
'babel-plugin-module-resolver',
{
root: ['./'],
alias: defaultAlias,
},
],
],
},
benchmark: {
plugins: [
...productionPlugins,
[
'babel-plugin-module-resolver',
{
alias: defaultAlias,
},
],
],
},
},
};
};