Sometimes, we want to fix Stdout buffer issue using Node child_process with JavaScript.
In this article, we’ll look at how to fix Stdout buffer issue using Node child_process with JavaScript.
How to fix Stdout buffer issue using Node child_process with JavaScript?
To fix Stdout buffer issue using Node child_process with JavaScript, we can listen to the data event when we call process.spawn.
For instance, we write
const child = process.spawn("<process>", []);
child.stdout.on("data", (data) => {
console.log("stdout: " + data);
});
child.stderr.on("data", (data) => {
console.log("stderr: " + data);
});
child.on("close", (code) => {
console.log("child process exited with code " + code);
});
to call process.spawn to run a command.
Then we listen to the data event emitted by stdout with
child.stdout.on("data", (data) => {
console.log("stdout: " + data);
});
We do the same with stderr with
child.stderr.on("data", (data) => {
console.log("stderr: " + data);
});
Then we listen for the close event to check when the command is done with
child.on("close", (code) => {
console.log("child process exited with code " + code);
});
Conclusion
To fix Stdout buffer issue using Node child_process with JavaScript, we can listen to the data event when we call process.spawn.
