react-playground | ️ Online React | Frontend Framework library
kandi X-RAY | react-playground Summary
kandi X-RAY | react-playground Summary
️ Online React playground that auto-evaluates as you type + Javascript and Typecsript console
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QUESTION
I've searched high and low for best practices when using testing react library. I have a test which uses react context which I'm trying to test with a component to ensure it updates correct. It's quite a bit of code so I'll narrow it down here (though still a lot).
Working version of this code can be found here https://codesandbox.io/s/react-playground-forked-mllwv8 (though the test platform isn't set up so this may not help much as not sure how to implement webpack on cs)
The run of functionality is:
- PeoplePageComponent loads
- useEffect runs and runs fetchPeople from the CONTEXT
- fetchPeople(context function) runs fetchPeople(actual function) from fetchPeople.jsx which dispatches SET_PEOPLE
- in PeoplePageComponent useEffect is triggered to where logic setsCurrentPage
I want to test:
- render PeoplePageComponent with providerValue (people: null)
- Assert page is
loading
- assert
mockFetchPeople
was called 1 time - Rerender PeoplePageComponent with providerValue (people:[{name: "tommy", age: 24}]) (THIS IS THE BIT I'M UNSURE OF)
- assert
mockSetCurrentPage
was called 1 time - assert page is
hasPeople
What would be the best way to do this given the set up I have? please bare in mind this code is actually very different to the code I'm using but the mechanisms are used in the same way
fetchPeople.jsx
...ANSWER
Answered 2022-Mar-08 at 11:47Without changing the application code, you could not mock the context value, but the fetchPeople
function. I assume in the real code it is a network request, thus it should be mocked anyway. Moreover not mocking the context provider makes the test more robust because it resemble more the way the software is used. In fact, it does not simulate context updates and it tests how the page manipulate the context.
QUESTION
I created a Modal with a Carousel inside of it and I want it to be responsive. I tried out several CSS settings that I found here on StackOverflow, but none of them worked for me. How can I fix it?
CSS:
...ANSWER
Answered 2022-Mar-06 at 15:50I suggest you to use https://www.npmjs.com/package/react-responsive-carousel
.
I created sandbox here so you can check it.
QUESTION
Consider the following example:
...ANSWER
Answered 2021-Dec-16 at 21:07I don't believe this is possible. This just isn't how React works.
React renders all the JSX to a virtual DOM, then compares to the previously rendered DOM, and then mounts/unmounts as necessary from there.
QUESTION
I have made a codesandbox example with my case and need help making it work. Here is the link to the example.
Repro steps:
- Type something on the jodit editor
- Mouse click on the outside of the editor and you will see the log that says
onBlur
is triggered. - Switch to code edit mode using
icon on the top-left.
- Modify something on the html.
- Mouse click on outside of the editor and you will NOT see any additional log.
My initial goal is to confirm this mechanism is by design or a bug and I tried to ask to the community before opening a ticket on the github repository.
You may also have noticed that the logging system is not working properly in my example.
I tried to stack all the logs - onChange
, onBlur
but it is showing only the last log. It works fine when I click on the Add
button. Maybe there is something wrong with react hook usage.
Can someone please help me with the above issues?
onBlur
is not triggered on code edit mode in theJodit
editor. Is it by design or a bug?- Why do I see only the latest log instead of the stacked logs?
Thank you in advance.
...ANSWER
Answered 2021-Nov-14 at 15:38onBlur
is not called because insidejodit
a separatetextarea
is used to display the code, this is either a bug injodit-react
or injodit
itself- Inside
jodit-react
callbacks fortextarea
are added insideuseEffect
which is called only when theconfig
is changed.
For the correct display of the logs you need to fix the way of saving the logs to the state
QUESTION
I have this hook:
...ANSWER
Answered 2021-Oct-22 at 15:35The async method always return a Promise.
Since useGetPokemon
is an async method, it return a Promise. And Promise
does not contain fetchPokemon property, so the variable fetchPokemon
is undefined.
On the other hand, hook should not be an async method.
QUESTION
Okay so, there is that code:
...ANSWER
Answered 2021-Oct-20 at 15:08So the issue is that the script that's injected by iyziInit.createTag();
expects the iyziInit
variable to be defined in the global scope (attached to window).
Here's an example below that works and shows the form.
QUESTION
I've been working on this in a project non-stop for a couple days now, and I just cannot understand what is happening. I have an array of objects that is mapped and creates React elements. Carried inside the props of each element is a set of data, that can be used to determine if that element has an error or not - my goal is to display if there is an error. It seems that because of the promises in the "Error" component, the state of the error component is not returning as I would expect. I've rebuilt a much simplified version of my app and linked it here: https://codesandbox.io/s/react-playground-forked-ub4nm?file=/Error.js:179-420
My expected result is that when liquid-linter returns it's result for the string: {% if merge %}test 1 2 3{% endif %}
, it's an empty array and the error should not display.
ANSWER
Answered 2021-Oct-08 at 23:28There you go, this fixes your problem!
QUESTION
I'm building a note editor in which everything is structured in terms of blocks so when the user selects multiple blocks i.e multiple paragraphs I'm showing a blue overlay over the box container of the block similar to notion.so, But what I want to do is when I show the blue overlay I want to remove the highlight color of the text (The blue highlight when you select text) I've tried user select none but it doesn't work as the class gets added afterwards, I've also tried -webkit-tap-highlight-color
but it also doesn't seem to work
Demo: https://www.awesomescreenshot.com/video/4910570?key=905d37aa5750ac2ef7055097c33b6f2b
Sandbox: https://codesandbox.io/s/react-playground-forked-vgel5?file=/Paragraph.js
...ANSWER
Answered 2021-Aug-19 at 20:53If you want to hide that blue color everywhere use this rule:
QUESTION
I noticed if I re-render a component with a new value that is used as initializer for useState, the value returned is cached from previous render instead of replacing it with new value. How can I avoid that behavior?
Minimal example:
...ANSWER
Answered 2021-Aug-09 at 19:40This is because when you're initializing your state:
QUESTION
I render two flat list, One shows category name and other shows its sub categories with check box. Now i want, when user checked multiple or one check box of the sub catogories, The count shows in category like Health(count = 2) is category: if i checked pharmacy and hopital. 1 pharmacy 2 hospital 3 nurse
...ANSWER
Answered 2021-Aug-02 at 11:40This is the same react link that you have provided but using react native.
It may not seems to work on codesandbox
because it uses react native web.
but it should work on react native app.
https://codesandbox.io/s/blissful-paper-hcyfc?file=/src/App.js
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