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FreshableType interface is missing in the API

Domain: API and ExtensibilityRelated to the API, extensibility, etcRelated to the API, extensibility, etc

Status: Open.

#4146 In microsoft/typescript-go;

· mrazauskas opened on Jun 1, 2026

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Post-7.0

Single-character template literal inference consumes a full code point in tsgo vs one UTF-16 code unit in tsc

Status: Open.

#4137 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

tsgo silently swallows JSON syntax errors in an extended tsconfig.json file

Status: Open.

#4131 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

JSDoc @type before return expr; acts as a type assertion in tsgo but is ignored in tsc

Status: Open.

#4128 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

JSDoc @satisfies on export default is enforced by tsgo but ignored by tsc

Status: Open.

#4127 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

With multiple /** @jsx */ pragmas in one file, tsc uses the first and tsgo uses the last

Status: Open.

#4120 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

U+2028/U+2029 inside a multi-line comment leaves 2 stray bytes in emitted JS (invalid UTF-8)

Status: Open.

#4119 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

Declaration emit drops expando function properties whose assignments are not top-level expression statements

Status: Open.

#4118 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

Declaration emit differs for negative numeric const literals

Status: Open.

#4116 In microsoft/typescript-go;

· mds-ant opened on May 31, 2026

Declaration emit spends significant CPU in getAliasForSymbolInContainer / getAlternativeContainingModules

Needs More Info

Status: Open.

#4101 In microsoft/typescript-go;

· Zzzen opened on May 30, 2026

·  

Possible Improvement

Lone surrogate in enum member name / const enum value is corrupted to U+FFFD in emitted JS

Status: Open.

#4092 In microsoft/typescript-go;

· mds-ant opened on May 30, 2026

Add API to get symbol type that respects the exactOptionalPropertyTypes option

Status: Open.

#4081 In microsoft/typescript-go;

· mrazauskas opened on May 30, 2026

·  

Post-7.0