how to make required field in jquery false code example

Example 1: required false jquery

if(val == 'other')
{
  $('#amount1').show().prop('required','true');
}
else
{
  $('#amount1').hide().removeAttr('required');   
}

Example 2: how to make required field in jquery false

making required false with js
$('#amount1').show().prop('required','true');