I’m newbie with D3 and I trying to create a Scatterplot graphic. When I try to create the points in the graphics this don’t appear correctly. I’ve got 9 points to put in the scatterplot but only appears 5. And all of these are not located correctly in their positions. For example, we’ve got one […]
Tag: reactjs
Remove margin from body in React
I’m new to React and currently in the process of building a website, however I cannot get rid of the margin of the body. My css in inside the index.js component and looks like this: <…
Can a child method have change handler in React?
I was wondering why the child component with the changed value is not getting rendered here. Isn’t it a good idea to have a child handle its own changes or better to have the controller in the parent? This is the Child TodoItem As you can see the state is changed with handleChange() but this […]
PrivateRouting when Token in Local Storage [TypeScript]
If my login in successful, an authentication token is returned, which is stored in the local storage. Upon successful login, I want to go the a private route. I found this code Javascript snippet but I am unable to make it work for Typescript. I don’t have any isAuthenthicated property yet. How could I modify […]
How to use google analytics with next.js app?
I’m using styled-components with next.js so my styles need to be server-side rendered, hence how can I add google analytics to my website? I checked next.js google analytics example but as I said my _document file is different because of using styled-components. Answer To correctly initialize gtag, do the following in _document.js or wherever you defined Head: The above will
Can’t find variable: counter, in expo
Been using React for a bit and wanted to try out native using expo, when I click on a button to increment a counter, I get a ReferenceError on my phone saying “Can’t find variable: counter”, I don’t get any error on the expo gui or in VSCode, very confused. Answer Change your increment function […]
How to set default variable in JSX for const with selector
I am fairly experienced with PHP and WordPress theming, but now struggling with the new Gutenberg editor. I have created a custom block plugin, which involves a lot of JS (React). To the latter I am a bit new. The block is creating a simple wrapper div with a html lang attribute assigned to it […]
What exactly is used for in React Router?
I am new to React learning , and was trying to build an app using react-router-dom. I was able to implement basic routing when I came across the term ‘switch’. Can anyone please explain me with a use-case example where we use switch and what is its use? Answer Since you are new am going […]
How to update “prevState” in react.js? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question I have got a list of array of objects. I want to update the state. When I click on the 1st item of the array,
React: How to mock Auth0 for testing with Jest
I’m using React(react-create-app and TypeScript). Login is made with Auth0. I want to write tests with Jest, and I found this ressource which is basically the only thing around that speaks about …