---
id: 8d4e63e7-781a-491e-9966-cd8f6e86c42c
title: checkJs
---

# Default

`false`

# Description

Report errors in .js files. <s>Use in conjunction with –allowJs.</s>
From [TypeScript 4.1](20201123094735-typescript_4_1) `checkJs` implies
[allowJs](20201127100938-allowjs).[^1]

# Footnotes

[^1]: <https://github.com/microsoft/TypeScript/pull/40275>