styled : validation decorator add Javascript validation decorators

README.md

@@ -796,6 +796,10 @@ isBoolean(value);
 
 | Decorator                                              | Description                                                                                                                                                                                           |
 | ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| **Javascript validation decorators**                   |                                                                                                                                                                                                       |
+| `@ValidateNested()`                                    | If the object contains nested objects and you want the validator to also validate those nested objects, use this. Nested objects must be instances of a class.                                        |
+| `@ValidatePromise()`                                   | If the object's property returns a Promise and that Promise's resolved value needs to be validated, use this decorator. It performs validation after the Promise is resolved.                         |
+| `@ValidateIf((value) => boolean)`                      | Uses the provided condition function to ignore the validators on a property when the function returns false. The condition function takes the object being validated and must return a boolean.       |
 | **Common validation decorators**                       |                                                                                                                                                                                                       |
 | `@IsDefined(value: any)`                               | Checks if value is defined (!== undefined, !== null). This is the only decorator that ignores skipMissingProperties option.                                                                           |
 | `@IsOptional()`                                        | Checks if given value is empty (=== null, === undefined) and if so, ignores all the validators on the property.                                                                                       |