💻
How are you using Babel?
Programmatic API (babel.transform, babel.parse)
Input code
class X {
static {
var x;
function x() {}
}
}REPL
Configuration file name
No response
Configuration
n/a
Current and expected behavior
I believe that the above code is legal. It happily runs in NodeJS.
Babel's parser throws an error Identifier 'x' has already been declared.
This only applies within a class static block. The following parses correctly (when sourceType: 'script'):
var x; function x() {}
class X {
foo() { var x; function x() {} }
static foo() { var x; function x() {} }
}
function f() { var x; function x() {} }
() => { var x; function x() {} };
function f2() { 'use strict'; var x; function x() {} }
() => { 'use strict'; var x; function x() {} };REPL
Environment
System:
OS: macOS 10.15.7
Binaries:
Node: 16.14.0 - ~/.nvm/versions/node/v16.14.0/bin/node
npm: 8.3.1 - ~/.nvm/versions/node/v16.14.0/bin/npm
npmPackages:
@babel/core: ^7.17.2 => 7.17.2
@babel/generator: ^7.17.0 => 7.17.0
@babel/helper-module-transforms: ^7.16.7 => 7.16.7
@babel/helper-plugin-utils: ^7.16.7 => 7.16.7
@babel/parser: ^7.17.0 => 7.17.0
@babel/plugin-transform-arrow-functions: ^7.16.7 => 7.16.7
@babel/plugin-transform-modules-commonjs: ^7.16.8 => 7.16.8
@babel/plugin-transform-react-jsx: ^7.16.7 => 7.16.7
@babel/plugin-transform-strict-mode: ^7.16.7 => 7.16.7
@babel/traverse: ^7.17.0 => 7.17.0
@babel/types: ^7.17.0 => 7.17.0
babel-plugin-dynamic-import-node: ^2.3.3 => 2.3.3
eslint: ^7.32.0 => 7.32.0
jest: ^27.5.1 => 27.5.1
Possible solution
No response
Additional context
Happy to work on a PR. But could someone please point in right direction? I'm not at all familiar with the parser.
💻
How are you using Babel?
Programmatic API (
babel.transform,babel.parse)Input code
REPL
Configuration file name
No response
Configuration
n/a
Current and expected behavior
I believe that the above code is legal. It happily runs in NodeJS.
Babel's parser throws an error
Identifier 'x' has already been declared.This only applies within a class static block. The following parses correctly (when
sourceType: 'script'):REPL
Environment
Possible solution
No response
Additional context
Happy to work on a PR. But could someone please point in right direction? I'm not at all familiar with the parser.