feat: use enum to replace const enum

Author: xiaoxiangmoe

.eslintrc.cjs

@@ -3,6 +3,14 @@
 const DOMGlobals = ['window', 'document']
 const NodeGlobals = ['module', 'require']
 
+const banConstEnum = {
+  selector: 'TSEnumDeclaration[const=true]',
+  message: 'Please use enums, instead',
+}
+
+/**
+ * @type {import('eslint-define-config').ESLintConfig}
+ */
 module.exports = {
   parser: '@typescript-eslint/parser',
   parserOptions: {
@@ -16,6 +24,7 @@ module.exports = {
 
     'no-restricted-syntax': [
       'error',
+      banConstEnum,
       // since we target ES2015 for baseline support, we need to forbid object
       // rest spread usage in destructure as it compiles into a verbose helper.
       'ObjectPattern > RestElement',
@@ -57,15 +66,21 @@ module.exports = {
       ],
       rules: {
         'no-restricted-globals': ['error', ...DOMGlobals],
-        'no-restricted-syntax': 'off'
+        'no-restricted-syntax': [
+          'error',
+          banConstEnum,
+        ]
       }
     },
     // Private package, browser only + no syntax restrictions
     {
       files: ['packages/template-explorer/**', 'packages/sfc-playground/**'],
       rules: {
         'no-restricted-globals': ['error', ...NodeGlobals],
-        'no-restricted-syntax': 'off'
+        'no-restricted-syntax': [
+          'error',
+          banConstEnum,
+        ]
       }
     },
     // JavaScript files
@@ -81,7 +96,10 @@ module.exports = {
       files: ['scripts/**', '*.{js,ts}', 'packages/**/index.js'],
       rules: {
         'no-restricted-globals': 'off',
-        'no-restricted-syntax': 'off'
+        'no-restricted-syntax': [
+          'error',
+          banConstEnum,
+        ]
       }
     }
   ]

package.json

@@ -75,6 +75,7 @@
     "esbuild": "^0.19.5",
     "esbuild-plugin-polyfill-node": "^0.3.0",
     "eslint": "^8.52.0",
+    "eslint-define-config": "^1.24.1",
     "eslint-plugin-jest": "^27.6.0",
     "estree-walker": "^2.0.2",
     "execa": "^8.0.1",

packages/compiler-core/src/ast.ts

@@ -21,11 +21,11 @@ import { ImportItem, TransformContext } from './transform'
 // compilers.
 export type Namespace = number
 
-export const enum Namespaces {
+export enum Namespaces {
   HTML
 }
 
-export const enum NodeTypes {
+export enum NodeTypes {
   ROOT,
   ELEMENT,
   TEXT,
@@ -59,7 +59,7 @@ export const enum NodeTypes {
   JS_RETURN_STATEMENT
 }
 
-export const enum ElementTypes {
+export enum ElementTypes {
   ELEMENT,
   COMPONENT,
   SLOT,
@@ -202,7 +202,7 @@ export interface DirectiveNode extends Node {
  * Higher levels implies lower levels. e.g. a node that can be stringified
  * can always be hoisted and skipped for patch.
  */
-export const enum ConstantTypes {
+export enum ConstantTypes {
   NOT_CONSTANT = 0,
   CAN_SKIP_PATCH,
   CAN_HOIST,

packages/compiler-core/src/compat/compatConfig.ts

@@ -13,7 +13,7 @@ export interface CompilerCompatOptions {
   compatConfig?: CompilerCompatConfig
 }
 
-export const enum CompilerDeprecationTypes {
+export enum CompilerDeprecationTypes {
   COMPILER_IS_ON_ELEMENT = 'COMPILER_IS_ON_ELEMENT',
   COMPILER_V_BIND_SYNC = 'COMPILER_V_BIND_SYNC',
   COMPILER_V_BIND_PROP = 'COMPILER_V_BIND_PROP',

packages/compiler-core/src/errors.ts

@@ -37,7 +37,7 @@ export function createCompilerError<T extends number>(
   return error
 }
 
-export const enum ErrorCodes {
+export enum ErrorCodes {
   // parse errors
   ABRUPT_CLOSING_OF_EMPTY_COMMENT,
   CDATA_IN_HTML_CONTENT,

packages/compiler-core/src/options.ts

@@ -73,7 +73,7 @@ export type HoistTransform = (
   parent: ParentNode
 ) => void
 
-export const enum BindingTypes {
+export enum BindingTypes {
   /**
    * returned from data()
    */

packages/compiler-core/src/parse.ts

@@ -80,7 +80,7 @@ export const defaultParserOptions: MergedParserOptions = {
   comments: __DEV__
 }
 
-export const enum TextModes {
+export enum TextModes {
   //          | Elements | Entities | End sign              | Inside of
   DATA, //    | ✔        | ✔        | End tags of ancestors |
   RCDATA, //  | ✘        | ✔        | End tag of the parent | <textarea>
@@ -502,7 +502,7 @@ function parseElement(
   return element
 }
 
-const enum TagType {
+enum TagType {
   Start,
   End
 }

packages/compiler-core/src/utils.ts

@@ -64,7 +64,7 @@ const nonIdentifierRE = /^\d|[^\$\w]/
 export const isSimpleIdentifier = (name: string): boolean =>
   !nonIdentifierRE.test(name)
 
-const enum MemberExpLexState {
+enum MemberExpLexState {
   inMemberExp,
   inBrackets,
   inParens,

packages/compiler-dom/src/errors.ts

@@ -20,7 +20,7 @@ export function createDOMCompilerError(
   ) as DOMCompilerError
 }
 
-export const enum DOMErrorCodes {
+export enum DOMErrorCodes {
   X_V_HTML_NO_EXPRESSION = 53 /* ErrorCodes.__EXTEND_POINT__ */,
   X_V_HTML_WITH_CHILDREN,
   X_V_TEXT_NO_EXPRESSION,
@@ -36,7 +36,7 @@ export const enum DOMErrorCodes {
 }
 
 if (__TEST__) {
-  // esbuild cannot infer const enum increments if first value is from another
+  // esbuild cannot infer enum increments if first value is from another
   // file, so we have to manually keep them in sync. this check ensures it
   // errors out if there are collisions.
   if (DOMErrorCodes.X_V_HTML_NO_EXPRESSION < ErrorCodes.__EXTEND_POINT__) {

packages/compiler-dom/src/parserOptions.ts

@@ -15,7 +15,7 @@ const isRawTextContainer = /*#__PURE__*/ makeMap(
   true
 )
 
-export const enum DOMNamespaces {
+export enum DOMNamespaces {
   HTML = 0 /* Namespaces.HTML */,
   SVG,
   MATH_ML