To disable type checking for a line in Typescript, you can choose one of these methods: Use @ts-ignore comment, Use @ts-expect-error or use Typescript-ESLint. So how to do it? Let’s go into detail now.
Disable type checking for a line in TypeScript
Use @ts-ignore comment
To disable type checking for a line in Typescript, you can use the @ts-ignore comment. That comment will help you to disable type checking for the following line.
Example:
const result = "Hello From Learn Share IT" % 10; console.log(result);
When I try to convert the ts file to js file, I will get an error because the remainder operator cannot use between string and number.
The error:
The left-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type.
1 const result = "Hello From Learn Share IT" % 10;
~~~~~~~~~~~~~~~~~~~~~~~~~~~
With the @ts-ignore comment, I can disable type checking for that line of code.
Example:
//@ts-ignore const result = "Hello From Learn Share IT" % 10; console.log(result);
Then I can convert the ts file to a js file.
//@ts-ignore var result = "Hello From Learn Share IT" % 10; console.log(result);
But of course, it is still not a valid value, so I will get NaN.
Output:
NaN
Use @ts-expect-error
With the @ts-expect-error comment, the line will make your compiler expect an error. That means the error only occurs when your code is correct.
Example:
//@ts-expect-error const result = "Hello From Learn Share IT" % 10; console.log(result);
Output:
NaN
With Typescript-ESLint
If you are using Typescript-ESLint, you can ignore the next line by this command:
eslint-disable-next-line
But it only disables the eslint rule for the following line, not with the ts or js rule.
Example:
//eslint-disable-next-line const result = "Hello From Learn Share IT" % 10; console.log(result);
I still get the error with “tsc”.
The error:
index.ts:2:16 - error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type.
2 const result = "Hello From Learn Share IT" % 10;
~~~~~~~~~~~~~~~~~~~~~~~~~~~
So you can combine the eslint-disable-next-line comment with the @ts-ignore or @ts-expect-error comment if you are working with Typescript-ESLint.
Example:
//eslint-disable-next-line //@ts-ignore const result = "Hello From Learn Share IT" % 10; console.log(result)
Output:
NaN
With entire file
If you want to disable multiple files, you can re-use the @ts-ignore comment.
Example:
//@ts-ignore const aString = "Hello World"; //@ts-ignore const aNumber = 10; //@ts-ignore const result = aString % aNumber; console.log(result);
Output:
NaN
But it might be cumbersome if you have many line codes and want to disable type checking. So with it, you can use the @ts-nocheck comment at the top of your file to disable type checking for the entire file.
Example:
//@ts-nocheck const aString = "Hello World"; const aNumber = 10; const result = aString % aNumber; console.log(result);
Output:
NaN
But always remember to be aware of how the code works and the result of your code. If not, it can lead to serious errors.
Summary
In this article, I showed you how to disable type checking for a line in Typescript. You can use the @ts-ignore
or @ts-expect-error
comment. Or if you have much of the line you want to disable type checking, you can use the @ts-nocheck
comment.
Maybe you are interested:
- How To Disable Type Checking For Javascript Files In Typescript
- How To Declare Function With A Readonly Return Type In TypeScript
- How To Disable Type Checking For An Entire File In Typescript

Hello, guys! I hope that my knowledge in HTML, CSS, JavaScript, TypeScript, NodeJS, ReactJS, MongoDB, Python, MySQL, and npm computer languages may be of use to you. I’m Brent Johnson, a software developer.
Name of the university: HOU
Major: IT
Programming Languages: HTML, CSS, JavaScript, TypeScript, NodeJS, ReactJS, MongoDB, PyThon, MySQL, npm