@nx/js
Version:
113 lines (112 loc) • 4.78 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const path_1 = require("path");
const semver_1 = require("semver");
const devkit_1 = require("@nx/devkit");
module.exports = function (api, options = {}) {
api.assertVersion(7);
const isModern = api.caller((caller) => caller?.isModern);
// use by @nx/cypress react component testing to prevent core js build issues
const isTest = api.caller((caller) => caller?.isTest);
// This is set by `@nx/rollup:rollup` executor
const isNxPackage = api.caller((caller) => caller?.isNxPackage);
const emitDecoratorMetadata = api.caller((caller) => caller?.emitDecoratorMetadata ?? true);
// Determine settings for `@babel//babel-plugin-transform-class-properties`,
// so that we can sync the `loose` option with `@babel/preset-env`.
// TODO(v21): Remove classProperties since it's no longer needed, now that the class props transform is in preset-env.
const loose = options.classProperties?.loose ?? options.loose ?? true;
if (options.classProperties) {
devkit_1.logger.warn(`Use =\`loose\` option instead of \`classProperties.loose\`. The \`classProperties\` option will be removed in Nx 20`);
}
const plugins = [
!isNxPackage
? [
require.resolve('@babel/plugin-transform-runtime'),
{
corejs: false,
helpers: true,
regenerator: true,
useESModules: isModern,
absoluteRuntime: (0, path_1.dirname)(require.resolve('@babel/runtime/package.json')),
},
]
: null,
require.resolve('babel-plugin-macros'),
emitDecoratorMetadata
? require.resolve('babel-plugin-transform-typescript-metadata')
: undefined,
// Must use legacy decorators to remain compatible with TypeScript.
[
require.resolve('@babel/plugin-proposal-decorators'),
options.decorators ?? { legacy: true },
],
[require.resolve('@babel/plugin-transform-class-properties'), { loose }],
].filter(Boolean);
return {
presets: [
// Support module/nomodule pattern.
[
require.resolve('@babel/preset-env'),
// For Jest tests, NODE_ENV is set as 'test' and we only want to set target as Node.
// All other options will fail in Jest since Node does not support some ES features
// such as import syntax.
isTest || process.env.NODE_ENV === 'test' || process.env.JEST_WORKER_ID
? { targets: { node: 'current' }, loose }
: createBabelPresetEnvOptions(options.useBuiltIns, isModern, loose),
],
[
require.resolve('@babel/preset-typescript'),
{
allowDeclareFields: true,
},
],
],
plugins,
overrides: [
// Convert `const enum` to `enum`. The former cannot be supported by babel
// but at least we can get it to not error out.
{
test: /\.tsx?$/,
plugins: [
[
require.resolve('babel-plugin-const-enum'),
{
transform: 'removeConst',
},
],
],
},
],
};
};
function createBabelPresetEnvOptions(useBuiltIns, isModern, loose) {
const presetOptions = {
// Do not transform modules to CJS
modules: false,
targets: isModern ? { esmodules: 'intersect' } : undefined,
bugfixes: true,
// Exclude transforms that make all code slower
exclude: ['transform-typeof-symbol'],
// This must match the setting for `@babel/plugin-proposal-class-properties`
loose,
};
// If core-js is installed then set corresponding options, otherwise don't use core-js.
// Previously, core-js was required for all projects, but it is not longer required when using only stable JS features that does not need to be transpiled.
const coreJsVersion = findCoreJsVersion();
if (coreJsVersion) {
presetOptions.useBuiltIns = useBuiltIns ?? 'entry';
presetOptions.corejs = useBuiltIns !== false ? coreJsVersion : null;
}
return presetOptions;
}
function findCoreJsVersion() {
try {
// nx-ignore-next-line
const v = require('core-js/package.json').version;
const { major, minor } = (0, semver_1.parse)(v);
return `${major}.${minor}`;
}
catch (e) {
return null;
}
}