Missing If

The input must be not present or empty if another input is equal to the given value.

The validation rule does not require a value to run against the input value.

The min rule works against floats and integers.

Example

src/app/products/controllers/create-product.ts

// ...
createProduct.validation = {
  rules: {
    category: ["missingIf:type,variation"],
  },
};

The previous validation works in a good use case, where you have an online store with multiple type of products, in this use case, the variation (child product) should not have a category because the parent product already has a category.