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kandi X-RAY | hooks Summary
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QUESTION
Update: Added a simpler demonstration jsfiddle, https://jsfiddle.net/47sfj3Lv/3/.
reproducing the problem in much less code I'm trying to move away from jQuery.
Some of my code, for populating some tables, has code like this
...ANSWER
Answered 2021-Jun-15 at 18:27This was difficult for me to understand, so I wanted to share if anyone else has the same issue.
It seems that an async method will break a method chain, there's no way around that. And since fetch is asynchronous, await must be used, and in order for await to be used, the calling method must be declared async. Thus the method chain will be broken.
The way the method chain is called must be changed.
In my OP, I linked https://jsfiddle.net/47sfj3Lv/3/ as a much simpler version of the same problem. StackOverflow's 'fiddle' effectively blocks 'fetch' for security reasons, so I need to use JSFiddle for demonstration.
Here's a working version of the same code using then and how/why it works, and a slightly shorter version, because await can be specified with the the fetch, obviously.
QUESTION
I am building an app following the Rest Countries API challenge from frontendmentor (https://www.frontendmentor.io/challenges/rest-countries-api-with-color-theme-switcher-5cacc469fec04111f7b848ca). I have run into a problem. When clicking on the router link in countryDetail.js, the url changes but the component doesn't get re-rendered unless the page is refreshed.
CountryDetails.js
...ANSWER
Answered 2021-Jun-15 at 17:07The issue seems to be that you are already on the "/country/:name" path and are clicking to visit another country. The router correctly updates the URL in the address bar, but because CountryDetail is already mounted it neglects to recompute the item and allCountries state. This is because the useEffect hook only runs once when the component mounts.
The name param (match.params.name) is actually a dependency for the GET requests, it should be added to the useEffect hook's dependency array.
QUESTION
I'm trying to display data from firebase in an antd table using hooks. I created a mini version of this application with a simple bootstrap design pulling the data from firebase with:
...ANSWER
Answered 2021-Jun-15 at 14:46I have the dumb and answered my own question. I did not in fact try every variation with/without .columns.
QUESTION
I'm using create-react-app and have configured my project for eslint. Below is my .eslintrc file.
...ANSWER
Answered 2021-Jun-15 at 12:54You can do it by adding DISABLE_ESLINT_PLUGIN=true to the "build" in the "scripts" part in your package.json:
QUESTION
package.json
...ANSWER
Answered 2021-Jun-15 at 14:23Hello I have found a solution. I had several instances running and therefore the npm start then selected a different port than I defined in the test. Have killed all processes on the port and restarted
QUESTION
I have set a react-native project with the cli. It works, but I have a very anoying eslint error:
Strings must use singlequote.eslint(quotes)
I have tried to write this:
...ANSWER
Answered 2021-Jun-15 at 13:57You can turn off any specific rule like so:
QUESTION
I'm new to react and trying to create a todo app using react hooks. I have an array todoList which i'm displaying inside unordered list and there is a checkbox for every todo element.Now, issue is the checkbox state is not getting changed on click. What am i missing? in OnChange i tried by directly changing item.isDone property and also i tried using setTodoList as well but in both cases there is nothing happening in UI. useForm is just another module that uses useState.
...ANSWER
Answered 2021-Jun-15 at 10:11Just change the onChange in input checkbox to
QUESTION
My classes are Hooks for setup and test. I try to click on cookie pop-up, using WebdriverWait, but don't work. I have no idea why.
I am a beginner with selenium and automation testing and I am writing a selenium script using java, TestNG, and maven. When I write everything in one class, all works fine, but I want to have a package for all objects, a package for tests, and Hooks with the main setting.
...ANSWER
Answered 2021-Jun-06 at 12:31
public WebDriver driver;
This declares a field, named driver. Not sure why you made it public.
WebDriver driver = new ChromeDriver();
This declares a local variable, also named driver, which is completely unrelated to the field you declared. As all local variables go, it ceases to exist when the method you declared it in ends. Because it has the same name, referencing variable driver in this method refers to the local variable and not the field.
All you really wanted was to make that second line:
QUESTION
I'm new in the Vueniverse (using Vue.js 2) and I'm struggling with watch. On mounted, I call an API and set the radio button to the value I got from the API, so basically I have two radio buttons with values 1 and 0 (true/false).
I think the watcher works correctly, because it does trigger when the value is changed. However, I don't want it to trigger on the initial change - that's when I first set the value from the backend.
I've tried with different lifecycle hooks, such as beforeCreated, created and so on and it always triggers.
Probably it's something easy to do but I can't figure out how and don't find information on the Internet (might using the wrong keywords).
The code:
...ANSWER
Answered 2021-Jun-15 at 08:32Try to take advantage from the old value which is 2nd parameter of the watch handler :
QUESTION
I have two functions , one of them adds an item in array and the other one delete from that array using React JS (hooks).[Both are handler of click event].
What I have works incorrectly.
``id`` comes from ``contact.length`` and I deleted it with``contacts.splice(id, 1)``.
I dont have any idea why it has this problem.
it doesnt delete what would be clicked but a random one. ...
ANSWER
Answered 2021-Jun-15 at 04:12Here we're assuming that id is the index of the element to be removed.
The splice function returns the removed elements, thus is not useful to take its result. Instead, make a copy of the array first, then remove the undesired element:
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