---
name: Library change
about: Fix or improve issues with built-in type definitions like `lib.dom.d.ts`, `lib.es6.d.ts`,
etc.
title: ''
labels: ''
assignees: ''
---
# lib Update Request
<!--
Please fill in each section completely. Thank you!
Are you here for one of these commonly-requested lib changes?
* Object.keys - see https://stackoverflow.com/questions/55012174/
* Array methods - see https://github.com/microsoft/TypeScript/issues/36554
* parseInt, parseFloat, isFinite, isNaN, etc. - see https://github.com/microsoft/TypeScript/issues/4002
The DOM lib is maintained elsewhere and you can skip a step by filing issues/PRs for the DOM at that repo.
See https://github.com/microsoft/TypeScript-DOM-lib-generator
-->
## Configuration Check
<!--
If you're missing common new methods like Array.includes, you may have a misconfigured project.
Try setting `lib: "es2020"` and checking whether the type you want is present.
You can diagnose further by running `tsc` with `--listFilesOnly` or `--showConfig`.
Conversely, if you are seeing built-in methods you expect to *not* see, check your 'lib' setting
or review your dependencies for lib/reference directives that might be polluting
your global scope. This is common when using the 'node' type library. See https://github.com/microsoft/TypeScript/issues/40184
Replace the text below:
-->
My compilation *target* is `ES2015` and my *lib* is `the default`.
## Missing / Incorrect Definition
<!--
What property, method, function, etc is missing or incorrect?
-->
## Sample Code
<!--
What's some code using this that should work, but doesn't?
-->
## Documentation Link
<!--
Link to relevant documentation (e.g. MDN, W3C, ECMAScript Spec) to consult for this property.
Note that lib.dom.d.ts intentionally does not include browser-specific extensions
or early experimental features.
-->