waitForData.js « util - tui-lib - Pure Node.js library for making visual command-line programs (ala vim, ncdu)

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waitForData.js « util - tui-lib - Pure Node.js library for making visual command-line programs (ala vim, ncdu)

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path: root/util/waitForData.js

blob: ed884022cba510f2dd7812a2c60a5dc0b4300b69 (plain)

module.exports = function waitForData(stream, cond = null) {
  return new Promise(resolve => {
    const listener = data => {
      if (cond ? cond(data) : true) {
        resolve(data)
        stream.removeListener('data', listener)
      }
    }
    stream.on('data', listener)
  })
}