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📄 getScriptKind

📊 Analysis Summary

Metric Count
🔧 Functions 2
📦 Imports 1

📚 Table of Contents

🛠️ File Location:

📂 packages/typescript-estree/src/create-program/getScriptKind.ts

📦 Imports

Name Source
path node:path

Functions

getScriptKind(filePath: string, jsx: boolean): ts.ScriptKind

Parameters:

  • filePath string
  • jsx boolean

Returns: ts.ScriptKind

Calls:

  • path.extname(filePath).toLowerCase

Internal Comments: 

// note - we only respect the user's jsx setting for unknown extensions
// this is so that we always match TS's internal script kind logic, preventing
// weird errors due to a mismatch.
// https://github.com/microsoft/TypeScript/blob/da00ba67ed1182ad334f7c713b8254fba174aeba/src/compiler/utilities.ts#L6948-L6968
// unknown extension, force typescript to ignore the file extension, and respect the user's setting

Code 
export function getScriptKind(filePath: string, jsx: boolean): ts.ScriptKind {
  const extension = path.extname(filePath).toLowerCase() as ts.Extension;
  // note - we only respect the user's jsx setting for unknown extensions
  // this is so that we always match TS's internal script kind logic, preventing
  // weird errors due to a mismatch.
  // https://github.com/microsoft/TypeScript/blob/da00ba67ed1182ad334f7c713b8254fba174aeba/src/compiler/utilities.ts#L6948-L6968
  switch (extension) {
    case ts.Extension.Cjs:
    case ts.Extension.Js:
    case ts.Extension.Mjs:
      return ts.ScriptKind.JS;

    case ts.Extension.Cts:
    case ts.Extension.Mts:
    case ts.Extension.Ts:
      return ts.ScriptKind.TS;

    case ts.Extension.Json:
      return ts.ScriptKind.JSON;

    case ts.Extension.Jsx:
      return ts.ScriptKind.JSX;

    case ts.Extension.Tsx:
      return ts.ScriptKind.TSX;

    default:
      // unknown extension, force typescript to ignore the file extension, and respect the user's setting
      return jsx ? ts.ScriptKind.TSX : ts.ScriptKind.TS;
  }
}

getLanguageVariant(scriptKind: ts.ScriptKind): ts.LanguageVariant

Parameters:

  • scriptKind ts.ScriptKind

Returns: ts.LanguageVariant

Internal Comments: 

// https://github.com/microsoft/TypeScript/blob/d6e483b8dabd8fd37c00954c3f2184bb7f1eb90c/src/compiler/utilities.ts#L6281-L6285

Code 
export function getLanguageVariant(
  scriptKind: ts.ScriptKind,
): ts.LanguageVariant {
  // https://github.com/microsoft/TypeScript/blob/d6e483b8dabd8fd37c00954c3f2184bb7f1eb90c/src/compiler/utilities.ts#L6281-L6285
  switch (scriptKind) {
    case ts.ScriptKind.JS:
    case ts.ScriptKind.JSON:
    case ts.ScriptKind.JSX:
    case ts.ScriptKind.TSX:
      return ts.LanguageVariant.JSX;

    default:
      return ts.LanguageVariant.Standard;
  }
}

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