Search Terms

error call chain fluent api

Suggestion

In call chains some errors like TS2554 ("Expected x arguments, but got y") are reported for the whole call chain.

Example:

In this case the error is reported (starting) at line 5 where the actual error is in line 14.

Suggestion: Just highlight the concerned (last) method invocation in this case.

Use Cases

• Fluent APIs: These sub-optimal error reporting is misguiding in fluent APIs because the start line number can be off hundreds of lines. Further, way too much is highlighted in red squiggles (for a single missing argument as in the example above).

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.