OpenMar 24, 2026
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•Last updated These PRs modify the built-in lib files and may potentially merge after TS 7.0
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fix(lib): reorder Array#reduce/reduceRight overloads in lib.d.ts
For Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 63064#63064 In microsoft/TypeScript;isArray() preserve mutability and element type
For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestoneStatus: Open (in progress).microsoft/TypeScriptnumber 48228#48228 In microsoft/TypeScript;Update lib.dom.d.ts:
MutationObserverInit.attributeFiltercan accept an iteratorFor Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 55989#55989 In microsoft/TypeScript;GeneratorFunction should not be newable
For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bugStatus: Open (in progress).microsoft/TypeScriptnumber 56646#56646 In microsoft/TypeScript;Use numeric literals for BYTES_PER_ELEMENT
For Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 59567#59567 In microsoft/TypeScript;Improve generic type signature of Iterator.from()
For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bugStatus: Open (in progress).microsoft/TypeScriptnumber 59927#59927 In microsoft/TypeScript;docs(lib): add @throws JSDoc for BigInt methods and constructor
For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bugStatus: Open (in progress).microsoft/TypeScriptnumber 61653#61653 In microsoft/TypeScript;lib: narrow
Atomics.wait*target to SharedArrayBuffer viewsFor Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bugStatus: Open (in progress).microsoft/TypeScriptnumber 61817#61817 In microsoft/TypeScript;fix(Intl): make Intl.Collator.compare a getter that returns a bound function (#62048)
For Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 62052#62052 In microsoft/TypeScript;lib Fix Part 4/6 – String.replaceAll and related changes
For Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 50452#50452 In microsoft/TypeScript;Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
For Backlog BugPRs that fix a backlog bugPRs that fix a backlog bugStatus: Open (in progress).microsoft/TypeScriptnumber 63248#63248 In microsoft/TypeScript;