Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I havesearched for related issues and found none that matched my issue.
• I haveread the FAQ and my problem is not listed.

Relevant Package

ast-spec

Playground Link

https://typescript-eslint.io/play/#ts=4.3.5&jsx=true&sourceType=module&showAST=es&code=DwQwfA3gvsD04G4g&eslintrc=N4KABGBEBOCuA2BTAzpAXGYBfEWg&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA

Repro Code

// This parses as a JSXExpressionContainer node whose expression is a JSXEmptyExpression node.<a>{}</a>;

ESLint Config

No response

tsconfig

No response

Expected Result

I expect that when using theAST_NODE_TYPES.JSXExpression type theAST_NODE_TYPES.JSXEmptyExpression won't be a member of the union.

Actual Result

What I see is that the definition of the union is:

exporttypeJSXExpression=|JSXEmptyExpression|JSXExpressionContainer|JSXSpreadChild;

Additional Info

Code like<a>{}</a> is parsed by typescript as aJsxExpression node who'sexpression value isundefined. As part of converting the JsxExpression node to an ESLint compatible AST, thetypescript-estree package replaces theundefined with aJSXEmptyExpression node (relevant code).

However, in theast-spec package theJSXEmptyExpression type is a part of theJSXExpression union (defined here). As explained above, this is incorrect as theJSXEmptyExpression node is only created as the child of a JSXExpression.

Versions