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