Validation with Yup. Yup is a JavaScript object schema validator. React Hook Form: Dynamic Yup validation schema - DEV Community Save code snippets in the cloud & organize them into collections. The isValidSync will only return true or false. Ask Question Asked 1 year, 11 months ago. I do however know the structure of the object the keys are referring to: ️Accepted Answer. First we create a function to extend our custom field data with Yup validations. This logic will be based on the type of the field, in this case we'll validate the URL fields. Dynamic Yup validation To validate an object we'd use the object import from yup like so import { object } from "yup"; Our validation schema would then be setup to mirror what the object structure will be to validate. Typescript Dynamic object keys (map) #1369 Write a title that summarizes the specific problem What are the correct types for a map() utility function that uses the lazy() method? Any ideas how can I fix this? Install yup. So we're using React because why not? Using the same idea of first creating a parent object ( validationObject ), we can then map through our HOBBIES array and dynamically generate keys for this object. In his post, Jason hits on the idea of using Yup’s .lazy () API to selectively run validation based on the specific value we have at the time of validation. While his final validation approach ends up being quite similar in function to using .notRequired ().default (undefined) , it did get me moving in a direction that met all of my test criteria. Validation Metadata Field-level Meta. Validate Field in Yup based on multiple related field values with … You can see the form we will build here. Example of dynamic object keys · Issue #130 · …