no-mutable-public-fields

✅ Using recommended in an ESLint configuration enables this rule.

🔧 Some problems reported by this rule are automatically fixable by the --fix ESLint command line option

This rule disallow making public variables of a class mutable.
(This rule applies only to classes that extends from Construct or Stack.)

It's not good to have mutable public variables, because it can lead to unintended side effects.

✅ Correct Example

import { Construct } from "constructs";
import { IBucket } from "aws-cdk-lib/aws-s3";

export class MyConstruct extends Construct {
  // ✅ Can use readonly
  public readonly bucket: IBucket;
}

❌ Incorrect Example

import { Construct } from "constructs";
import { IBucket } from "aws-cdk-lib/aws-s3";

export class MyConstruct extends Construct {
  // ❌ Shouldn't use mutable
  public bucket: IBucket;
}