# How to flip an image in Node Jimp?

Node.jsServer Side ProgrammingProgramming

NodeJS – Flip() is an inbuilt function that is used to flip the images. The images can be flipped either vertically or hoizontally as defined in the function. By default, the images are flipped horizontally.

## Syntax

flip(h, v, cb)

## Definition of flip() paramters

• h – It takes a boolean value as an input. Image will be flipped horizontally if this is TRUE.

• v – It takes a boolean value as an input. Image will be flipped vertically if this is TRUE.

• cb – This is also an optional parameter that can be invoked after the compilation is complete.

## Using Node JIMP – FLIP()

Before proceeding to use flip() functions, please check that the following statements are already executed for setting up the environment.

• npm init -y // Initialising the Node environment

• npm install jimp --save // Installing the jimp dependency

• Create a flip.js file and copy-paste the following code snippet in it.

• Use node flip.js to run the code.

Note − Note that the method name should match with the JS file name. Only then, it will be able to call the desired method.

### Example

const Jimp = require('jimp') ;

async function flip() { // Function name is same as of file name
('/home/jimp/tutorials_point_img.jpg');
image.flip(true, false, function(err){
if (err) throw err;
})
.write('/home/jimp/flip.jpg');
}

flip(); // Calling the function here using async
console.log("Image is processed successfully");

## Using Node JIMP – FLIP() when 'v' is TRUE

### Example

const Jimp = require('jimp') ;

async function flip() {
('/home/jimp/tutorials_point_img.jpg');
image.flip(true, true, function(err){
if (err) throw err;
})
.write('/home/jimp/flip.jpg');
}

flip();
console.log("Image is processed successfully");

### Output

Updated on 27-Apr-2021 13:24:43