22 lines
513 B
JavaScript
22 lines
513 B
JavaScript
const fs = require("fs");
|
|
const path = require("path");
|
|
|
|
const filepath = path.join(process.cwd(), "hello.txt");
|
|
|
|
fs.readFile(filepath, "utf8", function (err, contents) {
|
|
if (err) {
|
|
return console.log(err);
|
|
}
|
|
console.log("File Contents:", contents);
|
|
|
|
const upperContents = contents.toUpperCase();
|
|
updateFile(filepath, upperContents);
|
|
});
|
|
|
|
function updateFile(filepath, contents) {
|
|
fs.writeFile(filepath, contents, function (err) {
|
|
if (err) throw err;
|
|
console.log("File updated.");
|
|
});
|
|
}
|