2023-02-26 01:30

getting-started/17_file_io.js

@@ -0,0 +1,41 @@
+const fs = require('fs');
+
+// read
+fs.readFile('sample.txt', (error, data) => {
+    if (error) {
+        console.error(error);
+    } else {
+        console.log(data);
+    }
+});
+
+// read sync
+try {
+    const data = fs.readFileSync('sample.txt');
+    console.log(data);
+} catch (error) {
+    console.error(error);
+}
+
+// write
+const content = 'Test Text';
+fs.writeFile('test.txt', content, (error) => {
+    if (error) {
+        console.error(error);
+    }
+});
+
+
+// write sync, append mode
+try {
+    fs.writeFileSync('test.txt', content, { flag: 'a+' });
+} catch (error) {
+    console.error(error);
+}
+
+// another append mode
+fs.appendFile('test.txt', content, (error) => {
+    if (error) {
+        console.error(error);
+    }
+});