Category: TypeScript

Sometimes, we want to fix the "property ‘assign’ does not exist on type ‘ObjectConstructor’" error with TypeScript.

In this article, we’ll look at how to fix the "property ‘assign’ does not exist on type ‘ObjectConstructor’" error with TypeScript.

How to fix the "property ‘assign’ does not exist on type ‘ObjectConstructor’" error with TypeScript?

To fix the "property ‘assign’ does not exist on type ‘ObjectConstructor’" error with TypeScript, we should add 'es6' to compilerOptions.lib in tsconfig.json.

For instance, we write

{
  //...
  "compilerOptions": {
    "lib": ["es5", "es6", "dom", "es2015.collection"]
  }
  //...
}

to add "es6" to compilerOptions.lib in tsconfig.json so that the TypeScript compiler knows that the Object.assign method that comes with ES6 is available for use in our project.

Conclusion

To fix the "property ‘assign’ does not exist on type ‘ObjectConstructor’" error with TypeScript, we should add 'es6' to compilerOptions.lib in tsconfig.json.

Sometimes, we want to export a constant in TypeScript.

In this article, we’ll look at how to export a constant in TypeScript.

How to export a constant in TypeScript?

To export a constant in TypeScript, we can use the export keyword.

For instance, we write

./docs/users/admin.ts

export const adminUser = {
  //...
};

to export the adminUser constant.

Then we can import adminUser in another module by writing

import * as users from "./docs/users/admin";

const { adminUser } = users;

to import the whole module and name the imported module users with

import * as users from "./docs/users/admin";

Then we can reference adminUser with

const { adminUser } = users;

Conclusion

To export a constant in TypeScript, we can use the export keyword.

Sometimes, we want to ignore all errors in a TypeScript file.

In this article, we’ll look at how to ignore all errors in a TypeScript file.

How to ignore all errors in a TypeScript file?

To ignore all errors in a TypeScript file, we can add the // @ts-nocheck comment.

For instance, we add

// @ts-nocheck

on top of the TypeScript file that we want to ignore all errors for in our code.

Conclusion

To ignore all errors in a TypeScript file, we can add the // @ts-nocheck comment.

To fix the ‘Uncaught ReferenceError: exports is not defined’ error in files generated with TypeScript, we should remove the "type": "module" option from tsconfig.json.

For instance, if we have

{
  //...
  "type": "module"
  //...
}

in tsconfig.json then we should remove it so that the TypeScript compiler will transpile the code into something that doesn’t have export and import in the generated files.

Sometimes, we want to add generic object types in TypeScript.

In this article, we’ll look at how to add generic object types in TypeScript.

How to add generic object types in TypeScript?

To add generic object types in TypeScript, we can use the Record type.

For instance, we write

const myObj: Record<string, any> = {
  //...
};

to set myObj to the Record with the key type set to string and the property value type is set to any.

Conclusion

To add generic object types in TypeScript, we can use the Record type.