Each instance of an interface is associated with a single Writeable and a single Readable stream. To use the Readline module, we need to create an interface for reading and writing data to and from the stream.Īn interface is an abstraction that helps us interact with the stream. CodeĪs an example, let’s write two lines on STDOUT and remove the second line. Accepts an options Object that takes the following values: input - the readable stream to listen to (Required).
Otherwise, Readline.clearLine() returns true. Optionally, interface specifies a readline.Interface instance for which autocompletion is disabled when copy-pasted input is detected. The node:readline module provides an interface for reading data from a Readable stream (such as process.stdin ) one line at a time.
NODEJS READLINE CODE
Readline.clearLine() returns a boolean it returns false if the stream expects the calling code to wait for the drain event to be emitted. interface readline.InterfaceConstructor The readline.emitKeypressEvents() method causes the given Readable stream to begin emitting 'keypress' events corresponding to received input.
NODEJS READLINE FREE
Readline module makes it easier for input and reading the output given by the user. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. This module wraps up the process standard output and process standard input objects. Prototype readline.clearLine(stream, dir)ĭir : dir determines the direction relative to the cursor that will be cleared. The JavaScript readline module is a module provided by NodeJS so you can create an interactive command-line program that receives user input or read file content. Readline Module in Node.js allows the reading of input stream line by line. Readline.clearLine() clears the current line on the TTY stream in the direction specified by the user. The Readline.clearLine() method is contained in the ReadLine module, which provides an internal API for reading and writing data to and from the standard input.output streams.
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