parser15.js

char('a')
.chain(v1 => 
  char('b')
  .chain(v2 =>
    char('c')
    .map(v3 => [v1, v2, v3])
  )
)
.run('abc')
.fold(
  v => console.log('success', v)
  e => console.log('error', e)
)
// => success ['a', 'b', 'c']