Firstly, we'll import the file system core module
const fs = require('fs');
Next, Let's read data from a file
fs.readFile('./notes.md', (err, data) => {
if (err) {
console.log(err);
}
console.log(data.toString());
});
Great, we'll see how to write to files next, this code will create a new file if the referenced one does not exist
fs.writeFile('./note.md', 'I am a new file', () => {
console.log('created a new file succesfully')
})
Awesome, now let's delete the file if it already exists, or create it if it does not
if (fs.existsSync('./note.md')) {
fs.unlink('./note.md', (err) => {
if (err) {
console.log(err);
} else {
console.log('file deleted');
}
});
} else {
fs.writeFile('./note.md', 'I am a new file', () => {
console.log('file created');
});
}
Next, let's work with directories. We'll see how to create a new directory or delete it if it already exists.
if (fs.existsSync('./new-folder')) {
fs.rmdir('./new-folder', (err) => {
if (err) {
console.log(err);
} else {
console.log('folder deleted');
}
});
} else {
fs.mkdir('./new-folder', (err) => {
if (err) {
console.log(err);
} else {
console.log('folder deleted');
}
});
}
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