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The parsing problem of the compiler under specific syntax combinations

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#61975 In microsoft/TypeScript;

· na7ure-a opened on Jun 30, 2025

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Backlog

Text between Unicode escapes within an identifier is skipped

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#61043 In microsoft/TypeScript;

· graphemecluster opened on Jan 24, 2025

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Backlog

Generic syntax ambiguity is handled incorrectly

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#60874 In microsoft/TypeScript;

· reverofevil opened on Dec 29, 2024

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Backlog

The parsed identifier is incomplete due to updateSourceFile.

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#60773 In microsoft/TypeScript;

· YZJcode opened on Dec 16, 2024

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Backlog

Parse error when using <code>in</code> nested in a <code>for</code> initializer

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#59236 In microsoft/TypeScript;

· nicolo-ribaudo opened on Jul 11, 2024

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Backlog

<code>for (const x in #b)</code> is allowed

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#58754 In microsoft/TypeScript;

· Josh-Cena opened on Jun 3, 2024

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Backlog

<code>satisfies</code> does not work on a variable called <code>type</code>

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#58248 In microsoft/TypeScript;

· ayoreis opened on Apr 19, 2024

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Backlog

JS | Optional chaining left hand assignment not detected as syntax error.

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#57640 In microsoft/TypeScript;

· joshuao3 opened on Mar 4, 2024

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Backlog

Disallow newline after <code>as</code> after function instantiation

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#55806 In microsoft/TypeScript;

· nicolo-ribaudo opened on Sep 21, 2023

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Backlog

getLeadingCommentRanges misses comment in call expression

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#54906 In microsoft/TypeScript;

· NilsIrl opened on Jul 7, 2023

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Backlog

Unexpected ASI after <code>declare</code> (regression since version 4.4)

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

RescheduledThis issue was previously scheduled to an earlier milestoneThis issue was previously scheduled to an earlier milestone

Status: Open.

#54602 In microsoft/TypeScript;

· evanw opened on Jun 10, 2023

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TypeScript 5.7.0

Valid JS code reported by TS as illegal code: Keywords cannot contain escape characters

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Help WantedYou can do thisYou can do this

Status: Open.

#54196 In microsoft/TypeScript;

· jaitjacob opened on May 9, 2023

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Backlog