react.di | Dependency injection for react based upon inversify | Dependency Injection library
kandi X-RAY | react.di Summary
kandi X-RAY | react.di Summary
Dependency injection for react based upon inversify.
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QUESTION
I was working on a shopping website this morning, using React Typescript and Context API, and want to use React Reducers to manipulate my Shopping Cart State with the custom Types I created for the Product type, including an Items Array and some Functions ... The problem is I don't know how to pass parameters with the Action in the CartReducer function, and would like to know how you would do it
My CartContext
...ANSWER
Answered 2021-Jun-08 at 21:17Use a discriminated union as your action's type:
QUESTION
I was working on a shopping website this morning, using React Typescript and Context API ...
for the products, I used an open API from the web to retrieve some data (for the test), and I used that data as an initial state for my [products, setProducts]
...
when I console.log(products)
my products state inside the Context File, I do get the data but when I console.log
it in the App after using the provider I get an empty Array...
I have no idea why that's happening...
thanks for your help
Context API File
...ANSWER
Answered 2021-Jun-08 at 16:09React.useState
will use the passed value only the first time the component is rendered. To alter the value stored in the state you need to use the useProducts
function.
In your case you should use a useEffect
in the provider that updates the products
when the data
is changed.
Something like
QUESTION
I am trying to create a React Context
with TypeScript to share state between components. When creating the Context, I tried passing null
as the initial value.
ANSWER
Answered 2021-Jun-05 at 10:55You definitely need a interface or type for context (like IStateStringDef).
QUESTION
I have difficulties figuring out which types are required in order to make my custom hook work with useContext. I feel like I have tried every possible combination, but it's like a game of 'whack a mole', as soon as I get one part working another breaks.
What I find especially strange is that I get the message: Property 'createFlow' does not exist on type 'APIProps | null'
, although it's clearly part of APIProps right? My guess is that this is because of the initialization of the context, could someone help me with this?
Thanks!
The code is relatively short, so I'll post everything for easy copy-paste testing:
...ANSWER
Answered 2021-May-27 at 21:20createFlow
does not exist on null
, and you declare your type to be nullable. You have to assert that your context value is not null before using it:
QUESTION
I want to make it centered like the 1st modal on https://tailwindui.com/components/application-ui/overlays/modals
I copied the same classes on the Modal below but I am unable to center it vertically. The classes are the exact same.
Is it a React Portal issue?
Modal.tsx ...ANSWER
Answered 2021-Mar-12 at 10:39I had to add flex justify-center items-center
to the parent & remove the mx-auto
class from the child.
QUESTION
I am currently writing my context API like so:
...ANSWER
Answered 2021-Apr-27 at 10:41You need to provide a valid default context, and it should satisfy the type LoginContextProps
. For example, it may be [false, () => {}]
. []
that you used is not a valid value since it's empty, but every component that happens to be outside of any LoginContext.Provider
will expect that LoginContext
will provide them a boolean and a boolean setter.
QUESTION
I'm trying to use TypeScript in React and getting an error I don't understand:
...ANSWER
Answered 2021-Apr-24 at 05:41You need to specify that the this
is a User
when calling subExpired
:
QUESTION
I have a reducer with a nextAction state that works as sort of a callback. The NextAction is typed like so:
...ANSWER
Answered 2021-Mar-24 at 03:42I am not able to properly explain why this works, but I have two different solutions which don't involve assertion.
- Save
this.props.nextAction
to a variable.
QUESTION
Consider simply a toggle component which can be considered as a checkbox, and a form component that handles the toggle.
...ANSWER
Answered 2021-Mar-12 at 21:51Your mistake is that you are trying to type your onChange
property as it is an event handler for checkbox, but it is not. You are passing (checked: boolean) => void
, and call it inside actual event handler. If you want to pass actual event handler, function should look like this: (event) => setChecked(event.target.checked)
and whole code would be like this:
QUESTION
I have this code:
...ANSWER
Answered 2021-Mar-04 at 12:32This can be the responsibility of your Provider itself and run inside it's useEffect
like so :-
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