[Bug]: TypeScript parser does not set typeParameters for CallExpression

[gdbd]

💻

• Would you like to work on a fix?

How are you using Babel?

Programmatic API (babel.transform, babel.parse)

Input code

const babel = require("@babel/core");

const result = babel.transformSync(
  `
    someFunction<TSomeType>();
`,
  {
    parserOpts: { plugins: ["typescript"] },
    plugins: ["@babel/plugin-transform-typescript"],
    ast: true,
  },
);

Configuration file name

No response

Configuration

 {
    parserOpts: { plugins: ["typescript"] },
    plugins: ["@babel/plugin-transform-typescript"],
    ast: true,
  }

Current and expected behavior

expected: result.ast.program.body[0].expression.typeParameters !== null

actual: result.ast.program.body[0].expression.typeParameters === null

Environment

• babel: 7.24.0
• node.js: 21
• yarn: 1.22.21
• OS: linux 6.7

Possible solution

No response

Additional context

reproduce repository: https://github.com/gdbd/babel-test

to start:

1. clone
2. yarn install
3. yarn run 'transform-test'
4. yarn run 'plugin-test'

look in the output:
at step 3:

at step 4:

So, typeParameters is not avalibale directly via CallExpression but availbale whwn it accesses through it parents.

Same time, AST explorer works as expected:

[babel-bot]

Hey @gdbd! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite.

[JLHwung]

{
-    parserOpts: { plugins: ["typescript"] },
-    plugins: ["@babel/plugin-transform-typescript"],
+   plugins: ["@babel/plugin-syntax-typescript"],
    ast: true,
  }

Please remove the typescript transform if you are to inspect the AST, since the transform plugin will remove any typescript type annotations, while the syntax plugin is to only parse but not transform the typescript.

[gdbd]

@JLHwung thank you, problem is solved!