Map is one of the most popular and widely used functions when working with React. It has two prominent use cases. It’s quite similar to how thefilter()works. The first one is to modify the state of the application and the other to render a list of elements efficiently. Let’s start ...
We will learn handleChange() function with the help of a project in which we’re going to use handleChange() function to display the entered input. Creating React Application: Step 1:Create a React application using the following command: npx create-react-app handlechangedemo Step 2:After cr...
When we call the method on a value that is not an arraymap(), we get the error “TypeError: map is not a function”. To fix this error, we need toconsole.logkeep track of the value we are calling the map() method on and make sure we only call map on valid arrays. Below is s...
Learn how to use the forwardRef function in React to expose DOM nodes inside a component to its parent component. In React, refs are used for storing values that don’t trigger a re-render when updated. We can also assign refs to DOM elements so that we can reference the ref to manipul...
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This tutorial shows how to use the JavaScript map() function, which applies a transformation to the data in an array and constructs a second parallel array. Using the map() function to transform an array is an alternative to using the for keyword or the forEach() function. An example of...
importReact,{useMemo}from'react';functionExpensiveCalculation({input}){constresult=useMemo(()=>{// Perform some expensive calculation here},[input]);return<div>Result:{result}</div>;} useCallback useCallbackis another hook that allows you to memoize a callback function. It takes a function ...
UseSelector() is a custom hook included in the React Redux library, and it is used to extract data from the Redux store state for use in a React component. It does so by using a selector function. What is useDispatch used for?
A nested array is essentially an array of arrays, you can visualise them as a table, or a 2D grid. To map a nested array, you can use either a combination of the flat and map array functions, or a map within a map. Which one you might want to use depends on your situation, so...
First, runnpxto usecreate-react-appin a terminal window: npx create-react-appreact-googlemaps Copy Then, navigate to your new project directory: cdreact-googlemaps Before you add any code, let’s install your dependencies with: npminstallgoogle-maps-react@2.0.6 ...