This plugin transforms ES2015 modules to SystemJS. 

This plugin transforms ES2015 modules to SystemJS

hzoo

nicolo-ribaudo

jlhwung

existentialism

@babel/plugin-transform-modules-systemjs

Object.defineProperty(exports, "__esModule", {

exports.getExportSpecifierName = getExportSpecifierName;

var _helperPluginUtils = require("@babel/helper-plugin-utils");

var _helperHoistVariables = require("@babel/helper-hoist-variables");

var _helperModuleTransforms = require("@babel/helper-module-transforms");

var _helperValidatorIdentifier = require("@babel/helper-validator-identifier");

const buildTemplate = _core.template.statement(`

  SYSTEM_REGISTER(MODULE_NAME, SOURCES, function (EXPORT_IDENTIFIER, CONTEXT_IDENTIFIER) {

const buildExportAll = _core.template.statement(`

    if (KEY !== "default" && KEY !== "__esModule") EXPORT_OBJ[KEY] = TARGET[KEY];

WARNING: Dynamic import() transformation must be enabled using the

         @babel/plugin-transform-dynamic-import plugin. Babel 8 will

         no longer transform import() without using that plugin.

ERROR: Dynamic import() transformation must be enabled using the

       @babel/plugin-transform-dynamic-import plugin. Babel 8

       no longer transforms import() without using that plugin.

function getExportSpecifierName(node, stringSpecifiers) {

  } else if (node.type === "StringLiteral") {

    if (!(0, _helperValidatorIdentifier.isIdentifierName)(stringValue)) {

    throw new Error(`Expected export specifier to be either Identifier or StringLiteral, got ${node.type}`);

function constructExportCall(path, exportIdent, exportNames, exportValues, exportStarTarget, stringSpecifiers) {

      statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.stringLiteral(exportNames[0]), exportValues[0]])));

      for (let i = 0; i < exportNames.length; i++) {

        const exportName = exportNames[i];

        const exportValue = exportValues[i];

        objectProperties.push(_core.types.objectProperty(stringSpecifiers.has(exportName) ? _core.types.stringLiteral(exportName) : _core.types.identifier(exportName), exportValue));

      statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.objectExpression(objectProperties)])));

    const exportObj = path.scope.generateUid("exportObj");

    statements.push(_core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.identifier(exportObj), _core.types.objectExpression([]))]));

      KEY: path.scope.generateUidIdentifier("key"),

      EXPORT_OBJ: _core.types.identifier(exportObj),

    for (let i = 0; i < exportNames.length; i++) {

      const exportValue = exportValues[i];

      statements.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.memberExpression(_core.types.identifier(exportObj), _core.types.identifier(exportName)), exportValue)));

    statements.push(_core.types.expressionStatement(_core.types.callExpression(exportIdent, [_core.types.identifier(exportObj)])));

var _default = (0, _helperPluginUtils.declare)((api, options) => {

var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {

  const reassignmentVisited = new WeakSet();

    "AssignmentExpression|UpdateExpression"(path) {

      if (reassignmentVisited.has(path.node)) return;

      reassignmentVisited.add(path.node);

      const arg = path.isAssignmentExpression() ? path.get("left") : path.get("argument");

      if (arg.isObjectPattern() || arg.isArrayPattern()) {

        for (const name of Object.keys(arg.getBindingIdentifiers())) {

          if (this.scope.getBinding(name) !== path.scope.getBinding(name)) {

          const exportedNames = this.exports[name];

          for (const exportedName of exportedNames) {

            exprs.push(this.buildCall(exportedName, _core.types.identifier(name)).expression);

        path.replaceWith(_core.types.sequenceExpression(exprs));

      if (this.scope.getBinding(name) !== path.scope.getBinding(name)) return;

      const exportedNames = this.exports[name];

      const isPostUpdateExpression = _core.types.isUpdateExpression(node, {

        node = _core.types.binaryExpression(node.operator[0], _core.types.unaryExpression("+", _core.types.cloneNode(node.argument)), _core.types.numericLiteral(1));

      for (const exportedName of exportedNames) {

        node = this.buildCall(exportedName, node).expression;

        node = _core.types.sequenceExpression([node, path.node]);

      this.file.set("@babel/plugin-transform-modules-*", "systemjs");

      ["CallExpression" + (api.types.importExpression ? "|ImportExpression" : "")](path, state) {

        if (path.isCallExpression() && !_core.types.isImport(path.node.callee)) return;

          if (!this.file.has("@babel/plugin-proposal-dynamic-import")) {

              console.warn(MISSING_PLUGIN_WARNING);

            throw new Error(MISSING_PLUGIN_ERROR);

        path.replaceWith((0, _helperModuleTransforms.buildDynamicImport)(path.node, false, true, specifier => _core.types.callExpression(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("import")), [specifier])));

        if (path.node.meta.name === "import" && path.node.property.name === "meta") {

          path.replaceWith(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("meta")));

      ReferencedIdentifier(path, state) {

        if (path.node.name === "__moduleName" && !path.scope.hasBinding("__moduleName")) {

          path.replaceWith(_core.types.memberExpression(_core.types.identifier(state.contextIdent), _core.types.identifier("id")));

          state.contextIdent = path.scope.generateUid("context");

          state.stringSpecifiers = new Set();

            (0, _helperModuleTransforms.rewriteThis)(path);

          const exportIdent = scope.generateUid("export");

          const exportMap = Object.create(null);

          function addExportName(key, val) {

  "name": "@babel/plugin-transform-modules-systemjs",

  "description": "This plugin transforms ES2015 modules to SystemJS",

    "url": "https://github.com/babel/babel.git",

    "directory": "packages/babel-plugin-transform-modules-systemjs"

    "@babel/helper-hoist-variables": "^7.22.5",

    "@babel/helper-module-transforms": "^7.23.0",

    "@babel/helper-module-transforms": "^7.23.3",

    "@babel/helper-plugin-utils": "^7.22.5",

    "@babel/helper-validator-identifier": "^7.22.20"

    "@babel/helper-plugin-test-runner": "^7.22.5"

  "homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-modules-systemjs",

  "author": "The Babel Team (https://babel.dev/team)",

		@@ -82,3 +82,3 @@ "use strict";
		}
		var _default = (0, _helperPluginUtils.declare)((api, options) => {
		var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
		api.assertVersion(7);
		@@ -402,4 +402,3 @@ const {
		});
		exports.default = _default;

		//# sourceMappingURL=index.js.map

		{
		"name": "@babel/plugin-transform-modules-systemjs",
		"version": "7.23.0",
		"version": "7.23.3",
		"description": "This plugin transforms ES2015 modules to SystemJS",
		@@ -17,3 +17,3 @@ "repository": {
		"@babel/helper-hoist-variables": "^7.22.5",
		"@babel/helper-module-transforms": "^7.23.0",
		"@babel/helper-module-transforms": "^7.23.3",
		"@babel/helper-plugin-utils": "^7.22.5",
		@@ -29,3 +29,3 @@ "@babel/helper-validator-identifier": "^7.22.20"
		"devDependencies": {
		"@babel/core": "^7.23.0",
		"@babel/core": "^7.23.3",
		"@babel/helper-plugin-test-runner": "^7.22.5"
		@@ -32,0 +32,0 @@ },

Improved metrics

Worsened metrics

Dependency changes