await-repl

await-repl

Wrapper for repl.start()

await-repl is a simple wrapper for repl.start() that handles lines starting with 'await ' differently: instead of outputting the Promise (or value) it only returns when the Promise is resolved or rejected

Example

const awaitRepl = require('await-repl');
awaitRepl({
  rejectionHandler: (err) => 'Promise rejection: ' + err,
  awaitTimeout: 2000
});

Options

await-repl passes options to repl.start()

Additional options

• rejectionHandler
  function for formatting Promise-rejections
  it is passed a callback(err, res) for returning the formatted error to the repl
  returning a value is the same as calling callback(returnValue)
• awaitTimeout
  number of milliseconds before giving up waiting for Promises to be resolved
  will act like a Promise-rejection with new awaitRepl.AwaitTimeout()

REPL

> await 42
42
> await Promise.resolve(73)
73
> await new Promise((resolve, reject) => setTimeout(() => resolve('foo'), 1000))
/* After 1 second */
'foo'
>

Previous behavior

> 42
42
> Promise.resolve(73)
Promise { 73 }
> new Promise((resolve, reject) => setTimeout(() => resolve('foo'), 1000))
Promise { <pending> }
>

Limitations

Works only for lines starting with 'await ' so things like the following don´t work:

> let a = await getSomeValueFromDatabase(...)