But thank you for a comment, I should highlight it. Although less flexible than Lenses you keep almost the same code (slight modifiction in getIn & setIn). To handle all that logic somehow. I was under the impression that useFormik is not going to be a real user use-case given previous comments by @jaredpalmer (haven't had much time to spend here though, so that may have changed in later RCs). tgriesser/autobarrel: A simple utility creating barrel files in TypeScript, tgriesser/immutable-diff: Hi-Fi diffing for Immutable.js data structures, forked from immutablediff, tgriesser/formik: Build forms in React, without the tears . I have a PR here: #1336 (v1) and #2655 (v2) which do a significant amount of heavy lifting towards strengthening these types, but I never ended up getting 100% of the way there and have been focused on #2931 in the limited time I have to dedicate to Formik. For further actions, you may consider blocking this person and/or reporting abuse, Go to your customization settings to nudge your home feed to show content more relevant to your developer experience level. But in most cases, you would . Always surround loop and conditional bodies with curly braces. I want to point out on the topic that major enemy is Context here which wasn't designed with type declarations in mind. // these would be limited by the number of type aliases we wanted to support, // and be extremely hard to maintain in typescript, // these are proxies so not supported in IE, // this one is basically https://github.com/johnrom/formik-typed. If some email is Email, we can check whether it's also unique on the server, and if not, we can show error "This email is already used." With you every step of your journey. Well, I made my own abstraction to allow for a strong typing of fields and added other helpers also. npx create-next-app@latest --ts nextjs-formik-demo This will create a next project based on TypeScript. All of these definitions are actually implemented by our super-simple function from above, but now TypeScript will help us out so that we can only pass valid keys. Add import "antd/dist/antd.css" to your index.js file or check the Advanced setup section. <Formik> is a component that helps you with building forms. If you have any experiments you'd like to share, especially with the possibilities of Partial Inference mentioned above, I'm sure it'd be super useful when it comes to making Formik v3. https://github.com/react-hook-form/react-hook-form/blob/master/src/types/path/eager.ts, // ^^^^^^^^ typo, // https://github.com/jaredpalmer/formik/issues/1653, // https://github.com/jaredpalmer/formik/issues/1650, // oh no, value should be 'admin' | 'buyer' | 'seller'. Formik is great, but it would be even greater if type safety was developed further. I'd like to beleive the TS compiler would be able to infer the 2nd type parameter from the type of the used Lens but I'm not sure; @yelouafi I know, it was stated previously that I had only figured it out for a single level and was going to prepare the nesting at a later time. Traditionally, we would use a null or undefined or empty string, which is a very suboptimal and not generic approach. How to check if a capacitor is soldered ok. Why did NASA need to observationally confirm whether DART successfully redirected Dimorphos? Thank you. Use Git or checkout with SVN using the web URL. Compilation error with TypeScript in strict mode on. Please read the formik docs on when to use such an optimization (usually you don't and maybe should not optimize, unless you encounter performance issues in production). It would be really nice if we could do useField
(it's possible to access interface members like that) and get properly typed value out of it. Example #1 If you do want to control the disable behavior yourself you can provide the disable: boolean prop. However, when using TypeScript things are often a bit more complicated. The problem occurs whenever I type on TextField then the Wrapper component render so much times even other wrapper components not contained the typing textfield also render too In my real project, the Wrapper component is more complex than the sample code and it makes the textfield so laggy You signed in with another tab or window. Is there still more work to do here? import {useFormik, FormikProps} from "formik"; interface MyValues {id . Don't get me wrong, I know both Formik and Yup. If nothing happens, download Xcode and try again. I recommend you try both examples. It's not very clever, but so far I've got it working on #1336. useformik type for typescript whatever by Xerothermic Xenomorph on Jun 12 2021 Comment 0 xxxxxxxxxx 1 import {useFormik, FormikProps} from "formik"; 2 3 interface MyValues { 4 id: number; 5 } 6 export const MyComponent = () => { 7 const formik: FormikProps<MyValues> = useFormik<MyValues>( {}); 8 } 9 Source: stackoverflow.com Add a Grepper Answer It seems to be a lot of code, but once it's written, it's reusable forever. All additional props will be passed through. It uses Proxies to leverage dot notation syntax. Insofar as the proxy written there, it only appears to type the name (and very elegantly), unless you are suggesting there is a better way to infer the Field type (think value, validate, handleChange) from the path alone, as an alternative to what I've started in #1336.. Here, I've named the project nextjs-formik-demo. It makes any type optional. Edit: it looks like they switched to something similar (and cleaner), though I haven't used it to tell how well it works. As a mental model, Formik's type signatures are very similar to React Router 4's <Route>. Do we know what line of code is actually causing this error? Well occasionally send you account related emails. Give folders/files/components/functions unique names. We can use TypeScripts nested functions to close over a single type argument (the type of the field itself) and then return a set of function definitions that are based on that one argument. https://jaredpalmer.com/formik/docs/guides/typescript, [v2]: Add parse and format props to useField/Field, Typescript compile errors with many FormikHelpers when using nested fields, TypeScript: setFieldValue first parameter type, https://github.com/formium/formik/blob/7f27ae414d35c99a4f1e540584a8a872fd0debc5/packages/formik/src/types.tsx#L94-L95. A form is a domain model too. Insofar as the proxy written there, it only appears to type the name (and very elegantly), unless you are suggesting there is a better way to infer the Field type (think value, validate, handleChange) from the path alone, as an alternative to what I've started in #1336. Only surround arrow function parameters when necessary. and also resolve issues people are having where they want a form definition like this: I wrote a rudimentary typed useField hook using generics before I found this issue. By clicking Sign up for GitHub, you agree to our terms of service and Once unsuspended, steida will be able to comment and publish posts again. And yet still after many years, here I am writing yet another article about form validation. import { Grid, TextField, Button, makeStyles, createStyles, Theme, } from '@material-ui/core'. Among them: This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Build your own design system, or start with Material Design. form: The Formik bag meta: An object containing metadata (i.e. In classical Java etc. Other, completely alternative approach would be utilizing an own Context instance that would be properly typed. parser, scanner, emitter, checker). + typeof child. Check a full-fledged example of a sign-up form. It is quite simple. Thanks for contributing an answer to Stack Overflow! Formik Build forms in React, without the tears. Only use named exports. It comes at the cost of dev experience though, so I'd almost rather break things now than be locked in, maybe with a quick code mod to use a fallback for users who can't update their code right away. Was Max Shreck's name inspired by the actor? Take a look at User type. Tests should be kept in the same directory with ".test. It's clearly meant for simple input-like fields. It's fast! I think the generic inference on components in JSX context was not always a thing in TS, therefore it was not typed in formik in first place? If steida is not suspended, they can still re-publish their posts from their dashboard. // Modified From: https://github.com/jaredpalmer/formik/issues/1334. Type 'FormikState | ( (prevState: FormikState) => FormikState)' is not assignable to type 'FormikState | ( (prevState: FormikState) => FormikState)'. It would be so dope to solve this. import { String64, Email, UniqueEmail, Password, Phone } from 'typescript-fun'; const User = t.type( { email: UniqueEmail, }); Email type itself is the intersection of String64 and EmailString. The problem occur in TS 2.6.1 and TS 2.6.2. For example the following ideally would give a compile error: Typescript cannot (yet) enforce types of children. Plus, no added dependencies. This library enriches several Ant Design components with a required name: string prop that connects them to a Formik form field. And heres an example of our types in action: The function useTypedField above is an example of how we can use our path and path builder types to enforce that the caller of useTypedField actually provides a valid path from some form structure to a string. Inputs are properly named, values are the correct type, etc. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Find centralized, trusted content and collaborate around the technologies you use most. In the case of Formik the root lens (_ in the example) can be injected in the context and passed as argument in render props. There are also other design decisions why I did not make Formik clone, but that's for another blog post. Every UniqueEmail is Email but not every Email is UniqueEmail. import { Formik, Form, FormikProps } from 'formik'. And gives an example using the <Formik> component. After much brain-wracking (racking? I am sorry, I couldn't understand. When I turn it off it compiles just fine. By clicking Sign up for GitHub, you agree to our terms of service and @johnrom Do we need breaking changes to make setFieldValue infer the value type from the field string too? How to replace cat with bat system-wide Ubuntu 22.04. Here's the command: yarn add formik @material-ui yup @types/yup. The typeScript compiler ensures it. I wasn't trying to discourage making breaking changes, I was thinking about the possibility of making a PR but now I realize it's harder than that. They can still re-publish the post if they are not suspended. If this API is useful to Formik, it could use further testing. Either way, this PR isn't about typing Formik, it's about typing the fields themselves. TypeScript ^4.6.3: Browser---npm/Yarn: 8.19.2: Operating System: macOS: Are you saying that by passing FieldPath you'd be able to determine the type of value from Lens where FieldPath would equal something like addresses.street ? Seems still being an issue. You signed in with another tab or window. You signed in with another tab or window. DEV Community 2016 - 2022. Generate typescript interface definitions from SQL database schema. We'll utilize Yup with the Formik validationSchema to validate ou. A tag already exists with the provided branch name. If so, that's exactly where I'm going to be going next in the PR, but I'm having trouble building this project using yarn start when developing it. Parenthesized constructs should have no surrounding whitespace. Made with love and Ruby on Rails. Admittedly mine isn't as flexible as what @johnrom and @tpict came up with, specifically the nested field and array notation. will make the button always be enabled. Tgriesser Formik: Build forms in React, without the tears Check out Tgriesser Formik statistics and issues. But when using the useFormik hook it results in type conflicts: . We're going also import yup to validate our fields. Unfortunately, that's probably not so easy task and considering it's only for typing needs, probably not worth it. A string must be validated to be an email. With TypeScript we can create an interface for our form values to take advantage of static types! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. added setFieldValue function overload for better editor support, [Snyk] Upgrade yup from 0.29.3 to 0.32.11, [Snyk] Upgrade yup from 0.29.1 to 0.32.11, we need one generic type parameter to satisfy the, we need another generic type parameter to represent the form shape. Have a question about this project? So, I'd like to kick off another issue where I propose a real typed API for fields. Therefore, there are quite a few approaches out there to help us with that. Built on Forem the open source software that powers DEV and other inclusive communities. These problems are less apparent in smaller applications where fields are rendered directly as the children of the forms they live in. Formik is a great React form library; it takes in, validates, and submits user input in a way thats fairly flexible and reusable. Call it form-validation-app. // A similar approach may be PR'd into Formik soon. First, a set of TS rules to make a path getter string: Now that that's out of the way, we can create a field wrapper: The result looks something like this (the above is pseudocode; here's an actual screenshot from my app where I changed the TS type to match it): This is still a work-in-progress, so I recommend following millsp/ts-toolbelt#154 to stay up to date. Still a WIP, but seems to work for my use cases. We dont need to have, edux store, its such a not good practice at, Then, Formik really came to change it for us and let our, to build and our code so readable and well-written that now we dont. Take care in asking for clarification, commenting, and answering. Yo, What do you do? Wed love to talk with you about your next great software project. The SubmitButton is enabled if the form is valid or if it is not dirty and the submit count is zero. Once unpublished, this post will become invisible to the public and only accessible to Daniel Steigerwald. I had to explicitly tell VS Code which version of TS to use. Learn how to do custom fields in Formik and fix Typescript auto imports in visual studio code.Code: https://github.com/benawad/fullstack-graphql-airbnb-clone/tree/37_fix_typescriptLinks from video:https://ant.design/components/input-number/https://ant.design/components/select/Playlist: https://www.youtube.com/playlist?list=PLN3n1USn4xlnfJIQBa6bBjjiECnk6zL6s----Join the Discord: https://discord.gg/Vehs99V----Patreon: https://www.patreon.com/benawad----Follow Me Online Here:GitHub: https://github.com/benawadLinkedIn: https://www.linkedin.com/in/benawad/Instagram: http://instagram.com/benawad97Twitter: https://twitter.com/benawad#benawadTikTok: https://www.tiktok.com/@benawad ----Follow me online: https://voidpet.com/benawad#benawad Copyright Not to lure away, but primarily to suggest potential APIs, you might want to check out how @ForbesLindesay has strongly typed the values of Final Form in React Define Form. In most cases, though, this isn't needed. rev2022.12.7.43084. You can vote up the ones you like or vote down the ones you don't like, You may check out the related API usage on the sidebar. Do not change them. This component composes the functionality provided by Ant Designs (https://ant.design/components/form/) as well as Formiks (https://jaredpalmer.com/formik/docs/api/form)