In this article, we will explore different approaches to checking the orientation of an image file in Node.js. Specifically, we will compare two popular libraries, "sharp" and "image-size".

Sharp

To check if an image file is vertical or horizontal in Node.js, you can utilize the `sharp` package, which is a popular image processing library. Here's an example of how you can determine the orientation of an image file using `sharp`:

First, you need to install the `sharp` package by running the following command in your Node.js project directory:

To wait for multiple selectors to be loaded using Puppeteer and Node.js, you can make use of the `waitForSelector` function in conjunction with `Promise.all`. Here's an example of how you can accomplish this:
 

To check if a string starts with a number in Node.js, you can use a regular expression. 

Here's an example code snippet that checks if a string starts with a number:

const myString = "5abc";
const startsWithNumber = /^\d/.test(myString);

console.log(startsWithNumber); // true

In the code above, we first define a string `myString` that starts with the number 5. We then create a regular expression `/^\d/` that matches any string that starts with a digit (`\d`). 

In Node.js, you can remove a property or key from an object using the `delete` keyword.

Here's an example:

To remove string duplicates from an array in Node.js, you can use the `filter` method along with the `indexOf` method.

Here's an example: