how would i search a file for a string javascript in javascript

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

const searchFile = (filePath, searchString) => {
    // Read content of the file
    fs.readFile(filePath, 'utf8', (err, data) => {
        if (err) {
            console.error(err);
            return;
        }

        // Search for the string in the file
        if (data.includes(searchString)) {
            console.log(`String '${searchString}' found in the file.`);
        } else {
            console.log(`String '${searchString}' not found in the file.`);
        }
    });
};

// Usage
const filePath = 'example.txt'; // Path to the file
const searchString = 'javascript'; // String to search
searchFile(filePath, searchString);
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