Microsoft/TypeScript

Nested classes are not collapsible/expandable in Visual Studio

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#30,130 opened on Feb 27, 2019

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Experience EnhancementHelp WantedSuggestion

Description

Nested classes are not collapsible/expandable in Visual Studio.

export class ClassA{

    private ClassB = class{
        ...
    }

}

Code inside classB loses this functionality.

Contributor guide

Tech stack
typescript
Domain
tooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
TypeScript language service knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate how TypeScript's language service computes outlining spans for class declarations. The issue is that nested classes are not provided with folding ranges. Look into the function that generates outlining spans, likely in the language service's `getOutliningSpans` or similar. Check if nested class declarations are handled correctly and consider adding a test case for nested classes to verify the fix.