typescript/no-misused-new Correctness

✅ This rule is turned on by default.

What it does

Enforces valid definition of new and constructor. This rule prevents classes from defining a method named new and interfaces from defining a method named constructor.

Why is this bad?

JavaScript classes may define a constructor method that runs when a class instance is newly created.

TypeScript allows interfaces that describe a static class object to define a new() method (though this is rarely used in real world code). Developers new to JavaScript classes and/or TypeScript interfaces may sometimes confuse when to use constructor or new.

Examples

Examples of incorrect code for this rule:

declare class C {
  new(): C;
}

interface I {
  new (): I;
  constructor(): void;
}

Examples of correct code for this rule:

declare class C {
  constructor();
}

interface I {
  new (): C;
}

How to use

To enable this rule in the CLI or using the config file, you can use:

CLI

oxlint --deny typescript/no-misused-new

Config (.oxlintrc.json)

{
  "rules": {
    "typescript/no-misused-new": "error"
  }
}

References

• Rule Source