Issue: TypeScript autocomplete for template literal types ignores user's Quote Style preference

[Gabilabrebi]

🔎 Search Terms

List of keywords : "double", "quote", "preference", "style", "autcomplete", "template", "literral"

🕗 Version & Regression Information

TS Version : 6.0.3 or 7.0-rc

⏯ Playground Link

https://www.typescriptlang.org/play/?#code/C4TwDgpgBAKghgIwDYQHJwLbQLxQOTACMeUAPvsAEx4DcAUKJFAMID2SArhgHbpZS48ASwAmJcngBucThFoNw0eMghtOPAVAAGAEgDeylHwgBfAHT61XXplNb6jaAClWQ7pr10oUVtwBcUAAKcABOwEIyADwAShAAxqwhIpGGquzWADSwiChWPAB8+fQm9AncAM7AUMAQlQEubh5ePv5Qnt5QzSZ0JUA

💻 Code

type TableName = 't1' | 't2';
type ColumnName = 'id' | 'value';
type TableColumn = `${TableName}.${ColumnName}`;

type Join = {
  on: Partial<Record<TableColumn, TableColumn>>;
};

const test: Join = {
  on: {
    // Trigger autocomplete inside the object
  }
};

🙁 Actual behavior

The key is inserted using double quotes (e.g., "t1.id": ...), overriding the user's preference for single quotes.

🙂 Expected behavior

The key should be inserted using the quote style defined in the editor's preferences (e.g., single quotes if 'single' is selected).

Additional information about the issue

When using template literal types as keys in a Record or object mapping, the TypeScript language service's autocomplete functionality consistently forces double quotes (") when inserting the suggested keys, regardless of the user's configured javascript.preferences.quoteStyle or typescript.preferences.quoteStyle settings.

TS.quote.issue.mp4

This behavior is inconsistent with how standard string keys or property names are handled and complicates code consistency when working with complex template literal types in type-safe mappings.