appendFileSync
external fun appendFileSync(path: PathOrFileDescriptor, data: String, options: WriteFileOptions = definedExternally)(source)
external fun appendFileSync(path: PathOrFileDescriptor, data: Uint8Array, options: WriteFileOptions = definedExternally)(source)
Synchronously append data to a file, creating the file if it does not yet exist. data
can be a string or a Buffer
.
The mode
option only affects the newly created file. See {@link open} for more details.
import { appendFileSync } from 'node:fs';
try {
appendFileSync('message.txt', 'data to append');
console.log('The "data to append" was appended to file!');
} catch (err) {
// Handle the error
}
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If options
is a string, then it specifies the encoding:
import { appendFileSync } from 'node:fs';
appendFileSync('message.txt', 'data to append', 'utf8');
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The path
may be specified as a numeric file descriptor that has been opened for appending (using fs.open()
or fs.openSync()
). The file descriptor will not be closed automatically.
import { openSync, closeSync, appendFileSync } from 'node:fs';
let fd;
try {
fd = openSync('message.txt', 'a');
appendFileSync(fd, 'data to append', 'utf8');
} catch (err) {
// Handle the error
} finally {
if (fd !== undefined)
closeSync(fd);
}
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Since
v0.6.7
Parameters
path
filename or file descriptor