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MIT License
Copyright (c) 2014-present Sebastian McKenzie and other contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# @babel/plugin-transform-classes
> Compile ES2015 classes to ES5
See our website [@babel/plugin-transform-classes](https://babeljs.io/docs/babel-plugin-transform-classes) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-transform-classes
```
or using yarn:
```sh
yarn add @babel/plugin-transform-classes --dev
```

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _helperCompilationTargets = require("@babel/helper-compilation-targets");
var _helperAnnotateAsPure = require("@babel/helper-annotate-as-pure");
var _core = require("@babel/core");
var _globals = require("globals");
var _transformClass = require("./transformClass.js");
const getBuiltinClasses = category => Object.keys(_globals[category]).filter(name => /^[A-Z]/.test(name));
const builtinClasses = new Set([...getBuiltinClasses("builtin"), ...getBuiltinClasses("browser")]);
var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
var _api$assumption, _api$assumption2, _api$assumption3, _api$assumption4;
api.assertVersion(7);
const {
loose = false
} = options;
const setClassMethods = (_api$assumption = api.assumption("setClassMethods")) != null ? _api$assumption : loose;
const constantSuper = (_api$assumption2 = api.assumption("constantSuper")) != null ? _api$assumption2 : loose;
const superIsCallableConstructor = (_api$assumption3 = api.assumption("superIsCallableConstructor")) != null ? _api$assumption3 : loose;
const noClassCalls = (_api$assumption4 = api.assumption("noClassCalls")) != null ? _api$assumption4 : loose;
const supportUnicodeId = !(0, _helperCompilationTargets.isRequired)("transform-unicode-escapes", api.targets());
const VISITED = new WeakSet();
return {
name: "transform-classes",
visitor: {
ExportDefaultDeclaration(path) {
if (!path.get("declaration").isClassDeclaration()) return;
{
var _path$splitExportDecl;
(_path$splitExportDecl = path.splitExportDeclaration) != null ? _path$splitExportDecl : path.splitExportDeclaration = require("@babel/traverse").NodePath.prototype.splitExportDeclaration;
}
path.splitExportDeclaration();
},
ClassDeclaration(path) {
const {
node
} = path;
const ref = node.id ? _core.types.cloneNode(node.id) : path.scope.generateUidIdentifier("class");
path.replaceWith(_core.types.variableDeclaration("let", [_core.types.variableDeclarator(ref, _core.types.toExpression(node))]));
},
ClassExpression(path, state) {
const {
node
} = path;
if (VISITED.has(node)) return;
{
var _path$ensureFunctionN;
(_path$ensureFunctionN = path.ensureFunctionName) != null ? _path$ensureFunctionN : path.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
}
const replacement = path.ensureFunctionName(supportUnicodeId);
if (replacement && replacement.node !== node) return;
VISITED.add(node);
const [replacedPath] = path.replaceWith((0, _transformClass.default)(path, state.file, builtinClasses, loose, {
setClassMethods,
constantSuper,
superIsCallableConstructor,
noClassCalls
}, supportUnicodeId));
if (replacedPath.isCallExpression()) {
(0, _helperAnnotateAsPure.default)(replacedPath);
const callee = replacedPath.get("callee");
if (callee.isArrowFunctionExpression()) {
callee.arrowFunctionToExpression();
}
}
}
}
};
});
//# sourceMappingURL=index.js.map

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = addCallSuperHelper;
var _core = require("@babel/core");
const helper = _core.template.statement`
function CALL_SUPER(
_this,
derived,
args,
) {
function isNativeReflectConstruct() {
if (typeof Reflect === "undefined" || !Reflect.construct) return false;
// core-js@3
if (Reflect.construct.sham) return false;
// Proxy can't be polyfilled. Every browser implemented
// proxies before or at the same time as Reflect.construct,
// so if they support Proxy they also support Reflect.construct.
if (typeof Proxy === "function") return true;
// Since Reflect.construct can't be properly polyfilled, some
// implementations (e.g. core-js@2) don't set the correct internal slots.
// Those polyfills don't allow us to subclass built-ins, so we need to
// use our fallback implementation.
try {
// If the internal slots aren't set, this throws an error similar to
// TypeError: this is not a Boolean object.
return !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}),);
} catch (e) {
return false;
}
}
// Super
derived = GET_PROTOTYPE_OF(derived);
return POSSIBLE_CONSTRUCTOR_RETURN(
_this,
isNativeReflectConstruct()
? // NOTE: This doesn't work if this.__proto__.constructor has been modified.
Reflect.construct(
derived,
args || [],
GET_PROTOTYPE_OF(_this).constructor,
)
: derived.apply(_this, args),
);
}
`;
const helperIDs = new WeakMap();
function addCallSuperHelper(file) {
if (helperIDs.has(file)) {
return (_core.types.cloneNode || _core.types.clone)(helperIDs.get(file));
}
try {
return file.addHelper("callSuper");
} catch (_unused) {}
const id = file.scope.generateUidIdentifier("callSuper");
helperIDs.set(file, id);
const fn = helper({
CALL_SUPER: id,
GET_PROTOTYPE_OF: file.addHelper("getPrototypeOf"),
POSSIBLE_CONSTRUCTOR_RETURN: file.addHelper("possibleConstructorReturn")
});
file.path.unshiftContainer("body", [fn]);
file.scope.registerDeclaration(file.path.get("body.0"));
return _core.types.cloneNode(id);
}
//# sourceMappingURL=inline-callSuper-helpers.js.map

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{"version":3,"names":["_core","require","helper","template","statement","helperIDs","WeakMap","addCallSuperHelper","file","has","t","cloneNode","clone","get","addHelper","_unused","id","scope","generateUidIdentifier","set","fn","CALL_SUPER","GET_PROTOTYPE_OF","POSSIBLE_CONSTRUCTOR_RETURN","path","unshiftContainer","registerDeclaration"],"sources":["../src/inline-callSuper-helpers.ts"],"sourcesContent":["import { template, types as t, type File } from \"@babel/core\";\n\nconst helper = template.statement`\n function CALL_SUPER(\n _this,\n derived,\n args,\n ) {\n function isNativeReflectConstruct() {\n if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n\n // core-js@3\n if (Reflect.construct.sham) return false;\n\n // Proxy can't be polyfilled. Every browser implemented\n // proxies before or at the same time as Reflect.construct,\n // so if they support Proxy they also support Reflect.construct.\n if (typeof Proxy === \"function\") return true;\n\n // Since Reflect.construct can't be properly polyfilled, some\n // implementations (e.g. core-js@2) don't set the correct internal slots.\n // Those polyfills don't allow us to subclass built-ins, so we need to\n // use our fallback implementation.\n try {\n // If the internal slots aren't set, this throws an error similar to\n // TypeError: this is not a Boolean object.\n return !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}),);\n } catch (e) {\n return false;\n }\n }\n\n // Super\n derived = GET_PROTOTYPE_OF(derived);\n return POSSIBLE_CONSTRUCTOR_RETURN(\n _this,\n isNativeReflectConstruct()\n ? // NOTE: This doesn't work if this.__proto__.constructor has been modified.\n Reflect.construct(\n derived,\n args || [],\n GET_PROTOTYPE_OF(_this).constructor,\n )\n : derived.apply(_this, args),\n );\n }\n`;\n\nconst helperIDs = new WeakMap();\n\nexport default function addCallSuperHelper(file: File) {\n if (helperIDs.has(file)) {\n // TODO: Only use t.cloneNode in Babel 8\n // t.cloneNode isn't supported in every version\n return (t.cloneNode || t.clone)(helperIDs.get(file));\n }\n\n try {\n return file.addHelper(\"callSuper\");\n } catch {\n // old Babel doesn't support the helper.\n }\n\n const id = file.scope.generateUidIdentifier(\"callSuper\");\n helperIDs.set(file, id);\n\n const fn = helper({\n CALL_SUPER: id,\n GET_PROTOTYPE_OF: file.addHelper(\"getPrototypeOf\"),\n POSSIBLE_CONSTRUCTOR_RETURN: file.addHelper(\"possibleConstructorReturn\"),\n });\n\n file.path.unshiftContainer(\"body\", [fn]);\n file.scope.registerDeclaration(file.path.get(\"body.0\"));\n\n return t.cloneNode(id);\n}\n"],"mappings":";;;;;;AAAA,IAAAA,KAAA,GAAAC,OAAA;AAEA,MAAMC,MAAM,GAAGC,cAAQ,CAACC,SAAS;AACjC;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,CAAC;AAED,MAAMC,SAAS,GAAG,IAAIC,OAAO,CAAC,CAAC;AAEhB,SAASC,kBAAkBA,CAACC,IAAU,EAAE;EACrD,IAAIH,SAAS,CAACI,GAAG,CAACD,IAAI,CAAC,EAAE;IAGvB,OAAO,CAACE,WAAC,CAACC,SAAS,IAAID,WAAC,CAACE,KAAK,EAAEP,SAAS,CAACQ,GAAG,CAACL,IAAI,CAAC,CAAC;EACtD;EAEA,IAAI;IACF,OAAOA,IAAI,CAACM,SAAS,CAAC,WAAW,CAAC;EACpC,CAAC,CAAC,OAAAC,OAAA,EAAM,CAER;EAEA,MAAMC,EAAE,GAAGR,IAAI,CAACS,KAAK,CAACC,qBAAqB,CAAC,WAAW,CAAC;EACxDb,SAAS,CAACc,GAAG,CAACX,IAAI,EAAEQ,EAAE,CAAC;EAEvB,MAAMI,EAAE,GAAGlB,MAAM,CAAC;IAChBmB,UAAU,EAAEL,EAAE;IACdM,gBAAgB,EAAEd,IAAI,CAACM,SAAS,CAAC,gBAAgB,CAAC;IAClDS,2BAA2B,EAAEf,IAAI,CAACM,SAAS,CAAC,2BAA2B;EACzE,CAAC,CAAC;EAEFN,IAAI,CAACgB,IAAI,CAACC,gBAAgB,CAAC,MAAM,EAAE,CAACL,EAAE,CAAC,CAAC;EACxCZ,IAAI,CAACS,KAAK,CAACS,mBAAmB,CAAClB,IAAI,CAACgB,IAAI,CAACX,GAAG,CAAC,QAAQ,CAAC,CAAC;EAEvD,OAAOH,WAAC,CAACC,SAAS,CAACK,EAAE,CAAC;AACxB","ignoreList":[]}

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = transformClass;
var _helperReplaceSupers = require("@babel/helper-replace-supers");
var _core = require("@babel/core");
var _traverse = require("@babel/traverse");
var _helperAnnotateAsPure = require("@babel/helper-annotate-as-pure");
var _inlineCallSuperHelpers = require("./inline-callSuper-helpers.js");
function buildConstructor(classRef, constructorBody, node) {
const func = _core.types.functionDeclaration(_core.types.cloneNode(classRef), [], constructorBody);
_core.types.inherits(func, node);
return func;
}
function transformClass(path, file, builtinClasses, isLoose, assumptions, supportUnicodeId) {
const classState = {
parent: undefined,
scope: undefined,
node: undefined,
path: undefined,
file: undefined,
classId: undefined,
classRef: undefined,
superName: null,
superReturns: [],
isDerived: false,
extendsNative: false,
construct: undefined,
constructorBody: undefined,
userConstructor: undefined,
userConstructorPath: undefined,
hasConstructor: false,
body: [],
superThises: [],
pushedInherits: false,
pushedCreateClass: false,
protoAlias: null,
isLoose: false,
dynamicKeys: new Map(),
methods: {
instance: {
hasComputed: false,
list: [],
map: new Map()
},
static: {
hasComputed: false,
list: [],
map: new Map()
}
}
};
const setState = newState => {
Object.assign(classState, newState);
};
const findThisesVisitor = _traverse.visitors.environmentVisitor({
ThisExpression(path) {
classState.superThises.push(path);
}
});
function createClassHelper(args) {
return _core.types.callExpression(classState.file.addHelper("createClass"), args);
}
function maybeCreateConstructor() {
const classBodyPath = classState.path.get("body");
for (const path of classBodyPath.get("body")) {
if (path.isClassMethod({
kind: "constructor"
})) return;
}
let params, body;
if (classState.isDerived) {
const constructor = _core.template.expression.ast`
(function () {
super(...arguments);
})
`;
params = constructor.params;
body = constructor.body;
} else {
params = [];
body = _core.types.blockStatement([]);
}
classBodyPath.unshiftContainer("body", _core.types.classMethod("constructor", _core.types.identifier("constructor"), params, body));
}
function buildBody() {
maybeCreateConstructor();
pushBody();
verifyConstructor();
if (classState.userConstructor) {
const {
constructorBody,
userConstructor,
construct
} = classState;
constructorBody.body.push(...userConstructor.body.body);
_core.types.inherits(construct, userConstructor);
_core.types.inherits(constructorBody, userConstructor.body);
}
pushDescriptors();
}
function pushBody() {
const classBodyPaths = classState.path.get("body.body");
for (const path of classBodyPaths) {
const node = path.node;
if (path.isClassProperty() || path.isClassPrivateProperty()) {
throw path.buildCodeFrameError("Missing class properties transform.");
}
if (node.decorators) {
throw path.buildCodeFrameError("Method has decorators, put the decorator plugin before the classes one.");
}
if (_core.types.isClassMethod(node)) {
const isConstructor = node.kind === "constructor";
const replaceSupers = new _helperReplaceSupers.default({
methodPath: path,
objectRef: classState.classRef,
superRef: classState.superName,
constantSuper: assumptions.constantSuper,
file: classState.file,
refToPreserve: classState.classRef
});
replaceSupers.replace();
const superReturns = [];
path.traverse(_traverse.visitors.environmentVisitor({
ReturnStatement(path) {
if (!path.getFunctionParent().isArrowFunctionExpression()) {
superReturns.push(path);
}
}
}));
if (isConstructor) {
pushConstructor(superReturns, node, path);
} else {
{
var _path$ensureFunctionN;
(_path$ensureFunctionN = path.ensureFunctionName) != null ? _path$ensureFunctionN : path.ensureFunctionName = require("@babel/traverse").NodePath.prototype.ensureFunctionName;
}
path.ensureFunctionName(supportUnicodeId);
let wrapped;
if (node !== path.node) {
wrapped = path.node;
path.replaceWith(node);
}
pushMethod(node, wrapped);
}
}
}
}
function pushDescriptors() {
pushInheritsToBody();
const {
body
} = classState;
const props = {
instance: null,
static: null
};
for (const placement of ["static", "instance"]) {
if (classState.methods[placement].list.length) {
props[placement] = classState.methods[placement].list.map(desc => {
const obj = _core.types.objectExpression([_core.types.objectProperty(_core.types.identifier("key"), desc.key)]);
for (const kind of ["get", "set", "value"]) {
if (desc[kind] != null) {
obj.properties.push(_core.types.objectProperty(_core.types.identifier(kind), desc[kind]));
}
}
return obj;
});
}
}
if (props.instance || props.static) {
let args = [_core.types.cloneNode(classState.classRef), props.instance ? _core.types.arrayExpression(props.instance) : _core.types.nullLiteral(), props.static ? _core.types.arrayExpression(props.static) : _core.types.nullLiteral()];
let lastNonNullIndex = 0;
for (let i = 0; i < args.length; i++) {
if (!_core.types.isNullLiteral(args[i])) lastNonNullIndex = i;
}
args = args.slice(0, lastNonNullIndex + 1);
body.push(_core.types.returnStatement(createClassHelper(args)));
classState.pushedCreateClass = true;
}
}
function wrapSuperCall(bareSuper, superRef, thisRef, body) {
const bareSuperNode = bareSuper.node;
let call;
if (assumptions.superIsCallableConstructor) {
bareSuperNode.arguments.unshift(_core.types.thisExpression());
if (bareSuperNode.arguments.length === 2 && _core.types.isSpreadElement(bareSuperNode.arguments[1]) && _core.types.isIdentifier(bareSuperNode.arguments[1].argument, {
name: "arguments"
})) {
bareSuperNode.arguments[1] = bareSuperNode.arguments[1].argument;
bareSuperNode.callee = _core.types.memberExpression(_core.types.cloneNode(superRef), _core.types.identifier("apply"));
} else {
bareSuperNode.callee = _core.types.memberExpression(_core.types.cloneNode(superRef), _core.types.identifier("call"));
}
call = _core.types.logicalExpression("||", bareSuperNode, _core.types.thisExpression());
} else {
var _bareSuperNode$argume;
const args = [_core.types.thisExpression(), _core.types.cloneNode(classState.classRef)];
if ((_bareSuperNode$argume = bareSuperNode.arguments) != null && _bareSuperNode$argume.length) {
const bareSuperNodeArguments = bareSuperNode.arguments;
if (bareSuperNodeArguments.length === 1 && _core.types.isSpreadElement(bareSuperNodeArguments[0]) && _core.types.isIdentifier(bareSuperNodeArguments[0].argument, {
name: "arguments"
})) {
args.push(bareSuperNodeArguments[0].argument);
} else {
args.push(_core.types.arrayExpression(bareSuperNodeArguments));
}
}
call = _core.types.callExpression((0, _inlineCallSuperHelpers.default)(classState.file), args);
}
if (bareSuper.parentPath.isExpressionStatement() && bareSuper.parentPath.container === body.node.body && body.node.body.length - 1 === bareSuper.parentPath.key) {
if (classState.superThises.length) {
call = _core.types.assignmentExpression("=", thisRef(), call);
}
bareSuper.parentPath.replaceWith(_core.types.returnStatement(call));
} else {
bareSuper.replaceWith(_core.types.assignmentExpression("=", thisRef(), call));
}
}
function verifyConstructor() {
if (!classState.isDerived) return;
const path = classState.userConstructorPath;
const body = path.get("body");
const constructorBody = path.get("body");
let maxGuaranteedSuperBeforeIndex = constructorBody.node.body.length;
path.traverse(findThisesVisitor);
let thisRef = function () {
const ref = path.scope.generateDeclaredUidIdentifier("this");
maxGuaranteedSuperBeforeIndex++;
thisRef = () => _core.types.cloneNode(ref);
return ref;
};
const buildAssertThisInitialized = function () {
return _core.types.callExpression(classState.file.addHelper("assertThisInitialized"), [thisRef()]);
};
const bareSupers = [];
path.traverse(_traverse.visitors.environmentVisitor({
Super(path) {
const {
node,
parentPath
} = path;
if (parentPath.isCallExpression({
callee: node
})) {
bareSupers.unshift(parentPath);
}
}
}));
for (const bareSuper of bareSupers) {
wrapSuperCall(bareSuper, classState.superName, thisRef, body);
if (maxGuaranteedSuperBeforeIndex >= 0) {
let lastParentPath;
bareSuper.find(function (parentPath) {
if (parentPath === constructorBody) {
maxGuaranteedSuperBeforeIndex = Math.min(maxGuaranteedSuperBeforeIndex, lastParentPath.key);
return true;
}
const {
type
} = parentPath;
switch (type) {
case "ExpressionStatement":
case "SequenceExpression":
case "AssignmentExpression":
case "BinaryExpression":
case "MemberExpression":
case "CallExpression":
case "NewExpression":
case "VariableDeclarator":
case "VariableDeclaration":
case "BlockStatement":
case "ArrayExpression":
case "ObjectExpression":
case "ObjectProperty":
case "TemplateLiteral":
lastParentPath = parentPath;
return false;
default:
if (type === "LogicalExpression" && parentPath.node.left === lastParentPath.node || parentPath.isConditional() && parentPath.node.test === lastParentPath.node || type === "OptionalCallExpression" && parentPath.node.callee === lastParentPath.node || type === "OptionalMemberExpression" && parentPath.node.object === lastParentPath.node) {
lastParentPath = parentPath;
return false;
}
}
maxGuaranteedSuperBeforeIndex = -1;
return true;
});
}
}
const guaranteedCalls = new Set();
for (const thisPath of classState.superThises) {
const {
node,
parentPath
} = thisPath;
if (parentPath.isMemberExpression({
object: node
})) {
thisPath.replaceWith(thisRef());
continue;
}
let thisIndex;
thisPath.find(function (parentPath) {
if (parentPath.parentPath === constructorBody) {
thisIndex = parentPath.key;
return true;
}
});
let exprPath = thisPath.parentPath.isSequenceExpression() ? thisPath.parentPath : thisPath;
if (exprPath.listKey === "arguments" && (exprPath.parentPath.isCallExpression() || exprPath.parentPath.isOptionalCallExpression())) {
exprPath = exprPath.parentPath;
} else {
exprPath = null;
}
if (maxGuaranteedSuperBeforeIndex !== -1 && thisIndex > maxGuaranteedSuperBeforeIndex || guaranteedCalls.has(exprPath)) {
thisPath.replaceWith(thisRef());
} else {
if (exprPath) {
guaranteedCalls.add(exprPath);
}
thisPath.replaceWith(buildAssertThisInitialized());
}
}
let wrapReturn;
if (classState.isLoose) {
wrapReturn = returnArg => {
const thisExpr = buildAssertThisInitialized();
return returnArg ? _core.types.logicalExpression("||", returnArg, thisExpr) : thisExpr;
};
} else {
wrapReturn = returnArg => {
const returnParams = [thisRef()];
if (returnArg != null) {
returnParams.push(returnArg);
}
return _core.types.callExpression(classState.file.addHelper("possibleConstructorReturn"), returnParams);
};
}
const bodyPaths = body.get("body");
const guaranteedSuperBeforeFinish = maxGuaranteedSuperBeforeIndex !== -1 && maxGuaranteedSuperBeforeIndex < bodyPaths.length;
if (!bodyPaths.length || !bodyPaths.pop().isReturnStatement()) {
body.pushContainer("body", _core.types.returnStatement(guaranteedSuperBeforeFinish ? thisRef() : buildAssertThisInitialized()));
}
for (const returnPath of classState.superReturns) {
returnPath.get("argument").replaceWith(wrapReturn(returnPath.node.argument));
}
}
function pushMethod(node, wrapped) {
if (node.kind === "method") {
if (processMethod(node)) return;
}
const placement = node.static ? "static" : "instance";
const methods = classState.methods[placement];
const descKey = node.kind === "method" ? "value" : node.kind;
const key = _core.types.isNumericLiteral(node.key) || _core.types.isBigIntLiteral(node.key) ? _core.types.stringLiteral(String(node.key.value)) : _core.types.toComputedKey(node);
methods.hasComputed = !_core.types.isStringLiteral(key);
const fn = wrapped != null ? wrapped : _core.types.toExpression(node);
let descriptor;
if (!methods.hasComputed && methods.map.has(key.value)) {
descriptor = methods.map.get(key.value);
descriptor[descKey] = fn;
if (descKey === "value") {
descriptor.get = null;
descriptor.set = null;
} else {
descriptor.value = null;
}
} else {
descriptor = {
key: key,
[descKey]: fn
};
methods.list.push(descriptor);
if (!methods.hasComputed) {
methods.map.set(key.value, descriptor);
}
}
}
function processMethod(node) {
if (assumptions.setClassMethods && !node.decorators) {
let {
classRef
} = classState;
if (!node.static) {
insertProtoAliasOnce();
classRef = classState.protoAlias;
}
const methodName = _core.types.memberExpression(_core.types.cloneNode(classRef), node.key, node.computed || _core.types.isLiteral(node.key));
const func = _core.types.functionExpression(node.id, node.params, node.body, node.generator, node.async);
_core.types.inherits(func, node);
const expr = _core.types.expressionStatement(_core.types.assignmentExpression("=", methodName, func));
_core.types.inheritsComments(expr, node);
classState.body.push(expr);
return true;
}
return false;
}
function insertProtoAliasOnce() {
if (classState.protoAlias === null) {
setState({
protoAlias: classState.scope.generateUidIdentifier("proto")
});
const classProto = _core.types.memberExpression(classState.classRef, _core.types.identifier("prototype"));
const protoDeclaration = _core.types.variableDeclaration("var", [_core.types.variableDeclarator(classState.protoAlias, classProto)]);
classState.body.push(protoDeclaration);
}
}
function pushConstructor(superReturns, method, path) {
setState({
userConstructorPath: path,
userConstructor: method,
hasConstructor: true,
superReturns
});
const {
construct
} = classState;
_core.types.inheritsComments(construct, method);
construct.params = method.params;
_core.types.inherits(construct.body, method.body);
construct.body.directives = method.body.directives;
if (classState.hasInstanceDescriptors || classState.hasStaticDescriptors) {
pushDescriptors();
}
pushInheritsToBody();
}
function pushInheritsToBody() {
if (!classState.isDerived || classState.pushedInherits) return;
classState.pushedInherits = true;
classState.body.unshift(_core.types.expressionStatement(_core.types.callExpression(classState.file.addHelper(classState.isLoose ? "inheritsLoose" : "inherits"), [_core.types.cloneNode(classState.classRef), _core.types.cloneNode(classState.superName)])));
}
function extractDynamicKeys() {
const {
dynamicKeys,
node,
scope
} = classState;
for (const elem of node.body.body) {
if (!_core.types.isClassMethod(elem) || !elem.computed) continue;
if (scope.isPure(elem.key, true)) continue;
const id = scope.generateUidIdentifierBasedOnNode(elem.key);
dynamicKeys.set(id.name, elem.key);
elem.key = id;
}
}
function setupClosureParamsArgs() {
const {
superName,
dynamicKeys
} = classState;
const closureParams = [];
const closureArgs = [];
if (classState.isDerived) {
let arg = _core.types.cloneNode(superName);
if (classState.extendsNative) {
arg = _core.types.callExpression(classState.file.addHelper("wrapNativeSuper"), [arg]);
(0, _helperAnnotateAsPure.default)(arg);
}
const param = classState.scope.generateUidIdentifierBasedOnNode(superName);
closureParams.push(param);
closureArgs.push(arg);
setState({
superName: _core.types.cloneNode(param)
});
}
for (const [name, value] of dynamicKeys) {
closureParams.push(_core.types.identifier(name));
closureArgs.push(value);
}
return {
closureParams,
closureArgs
};
}
function classTransformer(path, file, builtinClasses, isLoose) {
setState({
parent: path.parent,
scope: path.scope,
node: path.node,
path,
file,
isLoose
});
setState({
classId: classState.node.id,
classRef: classState.node.id ? _core.types.identifier(classState.node.id.name) : classState.scope.generateUidIdentifier("class"),
superName: classState.node.superClass,
isDerived: !!classState.node.superClass,
constructorBody: _core.types.blockStatement([])
});
setState({
extendsNative: _core.types.isIdentifier(classState.superName) && builtinClasses.has(classState.superName.name) && !classState.scope.hasBinding(classState.superName.name, true)
});
const {
classRef,
node,
constructorBody
} = classState;
setState({
construct: buildConstructor(classRef, constructorBody, node)
});
extractDynamicKeys();
const {
body
} = classState;
const {
closureParams,
closureArgs
} = setupClosureParamsArgs();
buildBody();
if (!assumptions.noClassCalls) {
constructorBody.body.unshift(_core.types.expressionStatement(_core.types.callExpression(classState.file.addHelper("classCallCheck"), [_core.types.thisExpression(), _core.types.cloneNode(classState.classRef)])));
}
const isStrict = path.isInStrictMode();
let constructorOnly = body.length === 0;
if (constructorOnly && !isStrict) {
for (const param of classState.construct.params) {
if (!_core.types.isIdentifier(param)) {
constructorOnly = false;
break;
}
}
}
const directives = constructorOnly ? classState.construct.body.directives : [];
if (!isStrict) {
directives.push(_core.types.directive(_core.types.directiveLiteral("use strict")));
}
if (constructorOnly) {
const expr = _core.types.toExpression(classState.construct);
return classState.isLoose ? expr : createClassHelper([expr]);
}
if (!classState.pushedCreateClass) {
body.push(_core.types.returnStatement(classState.isLoose ? _core.types.cloneNode(classState.classRef) : createClassHelper([_core.types.cloneNode(classState.classRef)])));
}
body.unshift(classState.construct);
const container = _core.types.arrowFunctionExpression(closureParams, _core.types.blockStatement(body, directives));
return _core.types.callExpression(container, closureArgs);
}
return classTransformer(path, file, builtinClasses, isLoose);
}
//# sourceMappingURL=transformClass.js.map

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@ -0,0 +1,39 @@
{
"name": "@babel/plugin-transform-classes",
"version": "7.27.1",
"description": "Compile ES2015 classes to ES5",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-transform-classes"
},
"homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-classes",
"license": "MIT",
"publishConfig": {
"access": "public"
},
"main": "./lib/index.js",
"dependencies": {
"@babel/helper-annotate-as-pure": "^7.27.1",
"@babel/helper-compilation-targets": "^7.27.1",
"@babel/helper-plugin-utils": "^7.27.1",
"@babel/helper-replace-supers": "^7.27.1",
"@babel/traverse": "^7.27.1",
"globals": "^11.1.0"
},
"keywords": [
"babel-plugin"
],
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"devDependencies": {
"@babel/core": "^7.27.1",
"@babel/helper-plugin-test-runner": "^7.27.1"
},
"engines": {
"node": ">=6.9.0"
},
"author": "The Babel Team (https://babel.dev/team)",
"type": "commonjs"
}