Node child process spawn. The child_process. The exec() and spawn() methods are some of the frequently used Node. . JSON or XML data messages. Fork is useful when you want to send individual messages — e. If omitted, args defaults to an empty array. spawnSync () function provides equivalent functionality in a synchronous manner that blocks the event loop until the spawned process either exits or is terminated. The child_process. There are four different ways to create a child process in Node: spawn(), fork(), exec(), and execFile(). spawn() method spawns a new process using the given command, with command line arguments in args. Use the exec() method to run shell-like syntax commands on a small data volume. We’re going to see the differences between these four functions and when to use each. Spawn is useful when you want to make a continuous data transfer in binary/encoding format — e. js event loop. spawn launches a command in a new process: const { spawn } = require('child_process') const child = spawn('ls', ['-a', '-l']); You can pass arguments to the command executed by the spawn as array using its second argument. Spawned Child Processes Spawn returns a childObject, which you can then listen for events with. js child process module methods. transferring a 1 Gigabyte video, image, or log file. While for 'exec': Spawns a shell then executes the command within that shell, buffering any generated output. g. spawn () method spawns the child process asynchronously, without blocking the Node. Otherwise, use the spawn() command, as shown in this tutorial. vnskvtjxmduzytlaqolydjuoxcuafksdlkblfrxtaggjanvry