how to use the writefilesync function from fs-extra in javascript

To use the writeFileSync function from fs-extra in Node.js to write to a file synchronously, follow these steps:

1. Import the fs-extra module into your script:

index.tsx
const fs = require('fs-extra');
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2. Use the writeFileSync function to write to the desired file synchronously:

index.tsx
fs.writeFileSync('./path/to/file', 'Content to write to the file');
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In this example, we are writing the string 'Content to write to the file' to the file located at the path ./path/to/file.

Note: If the specified file does not exist, it will be created. If the file exists, its contents will be overwritten with the new content.

Here is an example usage of the writeFileSync function that reads from a file and writes back the same content as uppercase:

index.tsx
const fs = require('fs-extra');

const inputFilePath = './path/to/inputFile.txt';
const outputFilePath = './path/to/outputFile.txt';

// read the file
const content = fs.readFileSync(inputFilePath, 'utf-8');

// write the file with transformed content
fs.writeFileSync(outputFilePath, content.toUpperCase());

console.log('File written successfully.');
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In this example, we are reading the content of a file located at the inputFilePath. We are then transforming the content to uppercase and writing it back to a file at outputFilePath. Finally, we are logging a success message to the console.