readline.clearLine(stream, dir[, callback])

  • stream <stream.Writable>

  • dir <number>

    • -1: 从光标向左。
    • 1: 从光标向右
    • 0: 整行。
  • callback <Function> 操作完成后调用。

  • 返回: <boolean> 如果 stream 希望调用的代码在继续写入附加的数据之前等待 'drain' 事件触发,则为 false,否则为 true

readline.clearLine() 方法在由 dir 标识的指定方向上清除给定的 TTY 流的当前行。

  • stream <stream.Writable>
  • dir <number>

    • -1: to the left from cursor
    • 1: to the right from cursor
    • 0: the entire line
  • callback <Function> Invoked once the operation completes.
  • Returns: <boolean> false if stream wishes for the calling code to wait for the 'drain' event to be emitted before continuing to write additional data; otherwise true.

The readline.clearLine() method clears current line of given TTY stream in a specified direction identified by dir.