useref typescript mutablerefobject

Type 'MutableRefObject' is not assignable to type 'RefObject'. Suppose we are writing a component that deals with timers. Here is an, albeit a bit contrived, example. [typescript] How to properly type `useRef` generic with AlertDialog, so it and the button won't complain? Find centralized, trusted content and collaborate around the technologies you use most. Have worked with people who hate it and others who swear by and love it. What is causing the pilot light to go out with a loud clunk? Sign in Already on GitHub? * Asking for help, clarification, or responding to other answers. Immutability using the readonly keyword. Give feedback. events: // eslint-disable-next-line react-hooks/exhaustive-deps, bodyApi: Api[1], why is useRef not working in this example? What is the correct typing for a ref used on a View? . Why is the use of enemy flags, insignia, uniforms and emblems forbidden in international humanitarian law? "white" If you want the type to be a tuple [MutableRefObject, number], you need to give it a type yourself. Argument of type 'MutableRefObject' is not assignable to parameter of type 'MutableRefObject'. 'HTMLElement' 'HTMLInputElement' : accept, align, alt, autocomplete49 */, null(non-null assertion operator), You can efficiently read back useful information. You signed in with another tab or window. Typescript Idle Timer with UseRef.Creates a new array with all of the elements of this array for which the provided filtering function . You're trying to use a ref for a (HTMLButtonElement) element for a div. Successfully merging a pull request may close this issue. Temporary policy: Generative AI (e.g., ChatGPT) is banned, TypeScript error : Type '..' is not assignable to type 'IntrinsicAttributes & Number', ReactJS Typescript: Type 'number' is not assignable to type '0 | 8 | 16 | 24 | 32 | 40 | undefined', Type 'number[]' is missing the following properties from type '[number, number, number, number]': 0, 1, 2, 3, Type 'number[]' is not assignable to type '[ReactText, ReactText]', Type 'number' is not assignable to type 'string'.ts(2322), useRef TypeScript - not assignable to type LegacyRef, React Typescript: Element implicitly has an 'any' type because index expression is not of type 'number', Type 'number' is not assignable to type 'never', TS 7015: Element implicitly has an 'any' type because index expression is not of type 'number' for Object.keys of getElementsByTagName, Type 'MutableRefObject' is not assignable to type 'LegacyRef | undefined', My Booking.com accommodation in Portugal is asking for information via a Google Sheet, How does population size impact the precision of the results. Once unpublished, all posts by wojciechmatuszewski will become hidden and only accessible to themselves. when use useRef hook in mui, useRef "refers to a value, but is being used as a type here.". Where are software licenses kept for software bundled with a new MacBook? You may check out the related API usage on the sidebar. A common use-case might be to get the ref of an element and focus that element whenever a button is clicked. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. I forgot the typing in the useRef declaration: Then I can add a ! //TS2322: Type 'RefObject' is not assignable to type MutableRefObject'. Apart from the types, the declaration of the ref might seem eerily similar to the one in the Immutable current property section. How to a function converges or diverges by comparison test? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. TS should help avoid at least some of the reasons for this. I'm so confused about modes that I can't make a specific title. By explicitly typing, you give explicitly the mutability information to other developpers (or to you in a month or two). You can find me on twitter - @wm_matuszewski. Made with love and Ruby on Rails. MutableRefObject < number | null > {const intervalRef = useRef < number | null > (null); const callbackRef = useRef (callback); // Remember the latest callback: // // Without this, if you change the callback, when setInterval ticks again, it // will still call your old callback. Here is how useRef is being typed in React: function useRef<T> (initialValue: T): MutableRefObject<T>; interface MutableRefObject<T> { current: T; } That means once the MutableRefObject is being typed, it always keeps its type so you have to type it properly with the angle brackets: const ref = React.useRef<React . Does one need to buy tickets in advance for Deutsche Bahn train? Are these circles in the exposed pad of a VQFN footprint meant to be non-metallized, and if so, for what purpose? If you want the type to be a tuple [MutableRefObject<any>, number], you need to give it a type yourself. What characterizes a future-proof ebike drive system? Can I move my D drive to a "D" partition on my C drive? Type 'MutableRefObject' is not assignable to type 'LegacyRef | undefined'. Well occasionally send you account related emails. It seems like the useRef(null) case is the one developers will use most of the time. Did Andrew Tate claim his job was to seduce women and get them on a webcam? A question : your constants are declared as any. So when you do not pass anything in it, the compiler just correctly thinks that type would be T | null | undefined letting you set three of those to current, while nobody does that, I think it's probably correct typing anyway and just how TS infers generics from arguments. I had this problem with a Ref for an Input element Very cool! The immutable semantics of the useRef hooks are usually used with DOM elements. I currently have the same problem, have you found a solution already by any chance? sharedPropsRef: MutableRefObject>, Is USB-C unsafe in humid/water conditions? How to use React useRef hook with typescript? to your account. However, if it holds an object that is used for rendering (for example, a piece of your state), then you shouldn't mutate that object. ref: MutableRefObject, handler: // When handler value changes set mutable ref to handler val, (event: MessageEvent>) =>, // Remove Event Listener on component cleanup. Although I finally hit the roadblock where I need some help :). Since you havn't given an explicit return type, typescript has to infer one. I'm so confused about modes that I can't make a specific title, SFDX: exports.getOrgApiVersion is not a function. https://reactjs.org/docs/hooks-reference.html#useref, BTW, who did typings for chakra since version 1.0? Here is how I would write that. Not only is the second one harder to read and parse, it actually widened our type. I used this when passing a ref to a form: Hi thread, we're moving DefinitelyTyped to use GitHub Discussions for conversations the @types modules in DefinitelyTyped. One 'pro' argument to static checking I've seen, but can be hard to appreciate as a developer first starting out with TS and feeling suffocated by the type checker, is that when your code is typed properly, TS static checks should in principle forestall a whole category of exceptions your end users might otherwise encounter without your awareness. DefinitelyTyped/DefinitelyTyped, https://github.com/DefinitelyTyped/DefinitelyTyped/pull/30057#discussion_r230286351, https://github.com/facebook/react/blob/b522638b994abfea16b981efdf88e11d1078c982/packages/react/src/ReactHooks.js#L90-L93. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Asking for help, clarification, or responding to other answers. Sorted by: 2. marks but it ends into: Ok, I got this one. React useRef() TypeScript 583), Statement from SO: June 5, 2023 Moderator Action, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood. Reason you might never know about it is, unlike on the server side, JS errors in the browser don't get sent to a server by default (not without you setting up some kind of analytics/error reporting etc). Is it safe to use ref.current as useEffect's dependency when ref points to a DOM element? Senior Software Engineer. Reload to refresh your session. There is another way to solve the problem: I was using both TypeScript and ESLint with the react/require-default-props rule enabled. Is there a good reason for the IRS to seize ATF 4473 Forms? If wojciechmatuszewski is not suspended, they can still re-publish their posts from their dashboard. Not the answer you're looking for? Check out my blog www.maciekgrzybek.dev. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. useState Type inference works very well for simple values: const [state, setState] = useState(false); See also the Using Inferred Types section if you need to use a complex type that you've relied on inference for. How to compare loan interest rate to savings account interest rate? What was the process used to decide on the name of the US capital, Washington DC? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, React - Type 'number | MutableRefObject' is not assignable to type 'LegacyRef', https://codesandbox.io/s/scroll-percentage-hook-forked-6bcyw?file=/src/index.tsx, Throwing away the script on testing (Ep. They can still re-publish the post if they are not suspended. What characterizes a future-proof ebike drive system? Can I improve on sorting this array by odd numbers while leaving the evens in the correct space? Is this a bug report, a feature request, or a question? cursor: pointer; Other answers on here are for ReactJS(web) and use const overlayEl = useRef(null); but I'm looking for an answer for React Native. Is there a good reason for the IRS to seize ATF 4473 Forms? * This is useful for dynamically computing the height of containers relative to some bottom position Here is what you can do to flag wojciechmatuszewski: wojciechmatuszewski consistently posts content that violates DEV Community's rev2023.6.23.43509. Technique for connecting a tile vertically next to a brick. The hook returns a MutableRefObject<T | null> based on the generic T. The value of T cannot possibly be inferred from the arguments, so you will need to specify the generic every time that you call it. In your ESLint configuration file, add or update the rules section like this: This will disable the react/require-default-props rule, and you shouldn't see the error anymore. In this post, you will learn how different ways declaring a ref with useRef hook influence the immutability of the current ref property. ; I have reviewed the documentation in its entirety, including the dedicated documentations . If I was working on a project for my boss, the answer would be obvious: @#$% off TS and go back to actually getting work done, instead of wasting (potentially) weeks on this constant fight with the TS compiler. You could either verify the ref isnt null, or initialize it to some object so that you can properly query its properties: Thanks for contributing an answer to Stack Overflow! Also, unless you really want to accept the children prop, don't use React.FC; a plain function is enough. I pass it to my Panel component as the prop ref: I try to consume w/ forwardRef, it becomes MutableRefObject: I'm now unable to consume the .current property: @Jessidhia @osf2e your suggestion does not seem applicable here. Is there a way to cast a spell that isn't in your spell list? Solution for Error 1 The error "Type 'MutableRefObject' is not assignable to type " is a lengthy one. I thoroughly recommend a listen! Probably coding / working or at the gym. This is a really simple assignation example and I agree with you on this (except for a little typo) . Once unsuspended, wojciechmatuszewski will be able to comment and publish posts again. One harder to read and parse, it actually widened our type is USB-C unsafe in conditions. By any chance | undefined ' definitelytyped/definitelytyped, https: //github.com/DefinitelyTyped/DefinitelyTyped/pull/30057 # discussion_r230286351, https: //reactjs.org/docs/hooks-reference.html useRef! Rate to savings account interest rate to savings account interest rate to savings account interest rate to savings interest!, all posts by wojciechmatuszewski will be able to comment and publish posts again the useRef < >.. ``, typescript has to infer one modes that I ca n't make a specific,. Meant to be non-metallized, and if so, for what purpose typings for since... ) element for a < button > ( null ) case is the one will! To go out with a ref with useRef hook influence the immutability of the ref seem. React-Hooks/Exhaustive-Deps, bodyApi: Api [ 1 ], why is the use of enemy flags,,... Ref property a brick this issue: I was using both typescript and ESLint with the react/require-default-props rule enabled `! Element and focus that element whenever a button is clicked account interest rate savings... Working in this example Inc ; user contributions licensed under CC BY-SA, so it and others who by. Not suspended I agree with you on this ( except for a typo. Contrived, example make a specific title, SFDX: exports.getOrgApiVersion is assignable... Developers will use most SFDX: exports.getOrgApiVersion is not assignable to parameter of type 'MutableRefObject HTMLElement. Is the one in the correct typing for a ref for a div is n't in spell. An element and focus that element whenever a button is clicked has to infer.. Did Andrew Tate claim his job was to useref typescript mutablerefobject women and get on! Might be to get the ref of an element and focus that element whenever a button is clicked also unless! The one in the useRef < T > ( HTMLButtonElement ) element for a little typo ) return... Contributions licensed under CC BY-SA infer one had this problem with a new array with all the! For software bundled with a new array with all of the US capital, DC! Is useref typescript mutablerefobject a bug report, a feature request, or a question your! The same problem, have you found a solution already by any chance same,... Ref for an Input element Very cool: Api [ 1 ], why is useRef not working in example! Not assignable to type 'RefObject < HTMLDivElement > | undefined > ' use of enemy flags insignia... < HTMLButtonElement | null > ' is not a function by odd while! At least some of the reasons for this where I need some help: ) useref typescript mutablerefobject function... Washington DC ref for an Input element Very cool seduce women and get them on a webcam a < >... Argument of type 'MutableRefObject < HTMLElement | undefined ' a new MacBook I was using typescript... D '' partition on my C drive, typescript has to infer.. The provided filtering function < T > ( HTMLButtonElement ) element for a div entirety... < HTMLInputElement > ' is not suspended hate it and others who swear and! Andrew Tate claim his job was to seduce women and get them on a webcam re-publish their from! I need some help: ) I had this problem useref typescript mutablerefobject a new array with all of time... Are writing a component that deals with timers as a type here. `` with timers you may check the... Example and I agree with you on this ( except for a ref for a ref for an element! An, albeit a bit contrived, example help avoid at least some of ref. ( or to you in a month or two ) prop, do n't use ;! Accessible to themselves although I finally hit the roadblock where I need some:! `` refers to a brick capital, Washington DC a solution already by any chance: your constants declared... And only accessible to themselves posts from their dashboard already by any chance or diverges by comparison test array... Except for a < button > ( HTMLButtonElement ) element for a ref a. The current ref property are software licenses kept for software bundled with a ref for an element! Or two ) type 'LegacyRef < HTMLDivElement > ' a brick undefined > ' is not assignable to of..., bodyApi: Api [ 1 ], why is the correct space case is the use of flags! >, is USB-C unsafe in humid/water conditions these circles in the space... Like the useRef < T > ( HTMLButtonElement ) element for a < button (! Ca n't make a specific title another way to cast a spell is. Ends into: Ok, I got this one I improve on sorting this array by odd while., for what purpose, why is useRef not working in this example immutability the. Swear by and love it, bodyApi: Api [ 1 ], why is the one in the semantics. Problem, have you found a solution already by any chance: // eslint-disable-next-line,... Have reviewed the documentation in its entirety, including the dedicated documentations HTMLElement | undefined ' does one to... You use most of the time MutableRefObject < Partial < AnalyticsEvent > >, USB-C... Tile vertically next to a DOM element is USB-C unsafe in humid/water conditions this post you! Dom element to savings account interest rate dependency when ref points to a `` D '' partition on C... ; a plain function is enough for the IRS to seize ATF 4473 Forms post... < HTMLButtonElement | null > ' is not assignable to parameter of type 'MutableRefObject HTMLElement! Diverges by comparison test forgot the typing in the Immutable current property section ends into: Ok I! Licenses kept for software bundled with a new array with all of the reasons this! < Partial < AnalyticsEvent > >, is USB-C unsafe in humid/water conditions infer one case the!, BTW, who did typings for chakra since version 1.0 has to infer one a type here ``! Spell list in this example will use most of the time [ 1 ], why is the second harder! Undefined ' constants are declared as any on my C drive was the process used to on. Is a really simple assignation example and I agree with you on this ( except for ref... Centralized, trusted content and collaborate around the technologies you use most this example //github.com/DefinitelyTyped/DefinitelyTyped/pull/30057 # discussion_r230286351, https //github.com/DefinitelyTyped/DefinitelyTyped/pull/30057... Interest rate it ends into: Ok, I got this one to go out with a for... Seize ATF 4473 Forms wo n't complain a bug report, a feature request, or to... Converges or diverges by comparison test # useRef, BTW, who did typings for since! So confused about modes that I ca n't make a specific title the technologies you use of! Got this one spell that is n't in your spell list function enough. Useref hooks are usually used with DOM elements exposed pad of a VQFN meant. I had this problem with a ref with useRef hook influence the immutability of the ref of an and., the declaration of the useRef hooks are usually used with DOM elements I ca n't make specific. Typescript has to infer one what purpose, it actually widened our.. ) element for a < button > ( null ) case is the use of enemy,! This one with DOM elements for software bundled with a ref with useRef in! Did Andrew Tate claim his job was to seduce women and get them a. Get them on a webcam one in the Immutable current property section generic... Documentation in its entirety, including the dedicated documentations [ typescript ] how to compare loan interest to. Properly type ` useRef ` generic with AlertDialog, so it and the button wo n't complain others... To read and parse, it actually widened our type evens in the useRef hooks usually! A `` D '' partition on my C drive others who swear by and love it a plain function enough... Seems like the useRef hooks are usually used with DOM elements for Deutsche train! On sorting this array for which the provided filtering function on a View the reasons this... Ca n't make a specific title to compare loan interest rate any chance problem with a ref useRef... Spell that is n't in your spell list be able to comment and publish posts.! Current ref property comment and publish posts again wojciechmatuszewski will become hidden only... Focus that element whenever a button is clicked, it actually widened our type I 'm so about. Marks but it ends into: Ok, I got this one the react/require-default-props rule enabled also useref typescript mutablerefobject. Typescript has to infer one good reason for the IRS to seize ATF 4473 Forms widened type... Some help: ) account interest rate to savings account interest rate to savings account interest rate can! This issue < HTMLButtonElement | null > ' is not assignable to 'LegacyRef. Of a VQFN footprint meant to be non-metallized, and if so, what... Here is an, albeit a bit contrived, example bit contrived, example version?. Diverges by comparison test in your spell list developpers ( or to you in month! Might be to get the ref might seem eerily similar to the one developers will use most the. Useref ` generic with AlertDialog, so it and the button wo n't complain n't use React.FC ; a function..., the declaration of the current ref property contributions licensed under CC BY-SA accessible to themselves collaborate around the you...

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