This blog describes how to append in a text file in Node.js. To append to a text file in Node.js, you can use the fs.appendFile() function from the built-in fs (File System) module. This function appends data to a file, creating the file if it does not exist. Here’s how you can use it. The …
How to Perform Various File Operations in Node.js?
This blog describes How to Perform Various File Operations in Node.js. The following code shows a basic Node.js application that performs various file operations like reading, writing, copying, and deleting files. source.txt Output Make sure to create a source.txt file in the same directory as this script to test the read, write, copy, and delete …
How to create a React component that takes a name prop and displays a greeting message?
This blog describes how to create a React component that takes a name prop and displays a greeting message. You can create a React component that takes a name prop and displays a greeting message by simply using that prop within the component. Here’s how you can do it. Greeting.js App.js In this example: We …
How to change the background color of a component on button click using state in React?
This blog describes how to change the background color of a component on button click using state in React. You can change the background color of a component on button click using state in React by updating the state variable representing the background color when the button is clicked. Here’s how you can do it. …
How to toggle the visibility of content using state in React?
This blog describes how to toggle the visibility of content using state in React. To toggle the visibility of content using state in React, you can use the useState hook to manage the visibility state of the content. Here’s how you can do it. ToggleContent.js App.js In this example: We define a functional component called …
How to render a list of items using the map function in React?
This blog describes how to render a list of items using the map function in React. Rendering a list of items in React using the map function is a common pattern. You typically create an array of JSX elements by mapping over your data array and then render this array within your component’s return statement. …
How to create a counter app using functional components in React?
This blog describes how to create a counter app using functional components in React. To create a counter app using functional components in React, you’ll need to maintain the state of the counter using the useState hook. For example. CounterApp.js In this example: We import React and the useState hook from ‘react’. We define a …
How to display Hello World! using a functional component in React?
This blog describes how to display Hello World! using a functional component in React. To display “Hello, World!” using a functional component in React, you can create a simple functional component and return the desired text within JSX. For example. In this example: We import React from ‘react’ because JSX gets translated to React.createElement() calls. …
How to merge arrays using the spread syntax in ES6?
This blog describes how to merge arrays using the spread syntax in ES6. In ES6, you can merge arrays using the spread syntax (…). The spread syntax allows you to expand elements of an iterable (like an array) into places where multiple elements are expected. For example. Output n this example, […array1, …array2] is using …
How to extract values from an object using destructuring assignment in ES6?
This blog describes how to extract values from an object using destructuring assignment in ES6. In ES6, you can use destructuring assignment to extract values from an object. For example. Output In this example, { name, age, city } is the destructuring pattern. It extracts the values of name, age, and city properties from the …