no-unbound-method warns when deleting property

[tvuotila]

Bug Report

• TSLint version: 5.9.1
• TypeScript version: 2.4.2
• Running TSLint via: CLI

TypeScript code being linted

const a = {
  getText() {
    return 'text';
  }
};

delete a.getText;

with tslint.json configuration:

{
  "rules": {
    "no-unbound-method": true
  }
}

Actual behavior

Error Avoid referencing unbound methods which may cause unintentional scoping of 'this'.

Expected behavior

No error. I am deleting a property. There is no risk on deleting unbound method compared to other kind of properties.

[piotrgajow]

Hi, I think I could fix this issue by adding allow-delete parameter similar to what I have done previously for typeof operator. What do you think about such solution?

[JoshuaKGoldberg]

@piotrgajow that sounds great, yes please! 😄

[piotrgajow]

Ok, I have made PR for this change.

[JoshuaKGoldberg]

Fxed by #4548! ✨