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Tag: reactjs

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 […]

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 […]

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,