输入键技巧val（）长度/ jQuery

Question

I'm disabling the submit button until something is entered. The problem is that the Enter Key is counting as a Character or "length".

This is for a TextArea

Count.js.coffee

$(document).ready ->
  $(".cmnt_btn").attr "disabled", true
  $(".cmnt_area").keyup ->
    # Disable button when nothing is entered
    # Enter Key tricks this
    unless $(this).val().length is 0
      $(".cmnt_btn").attr "disabled", false
    else
      $(".cmnt_btn").attr "disabled", true
    # Character Count
    left = 300 - $(this).val().length
    left = 0  if left < 0
    $(".cmnt_counter").text left

How can i "disable" the enter Key counting as a Character or disabling the key until something else is entered ?

Answer 1

You're probably asking to trim new lines / spaces from the beginning and end of a textarea:

$(this).val().replace(/^\s+|\s+$/g, '').length

Also, setting true/false on the disabled attribute will do nothing: replace them with prop.