问Javascript过滤变量

EN

//the input box.
var input = document.getElementById('numbers');



//adding an event listener for change on the input box
input.addEventListener('input', handler, false);

//function that runs when the change event is emitted
function handler () {
  var items = input.value.replace(/\r?\n/g, ' ').split(' ');
      length = items.length;
  console.log('your collection', items);
  for (var i = 0; i < length; i++) {
    if ( items[i] && !isNaN(items[i]) ) {
      console.log('opening page for isbn ', items[i])
      openPage(items[i]);
    }
  }
}

//opens the tab for one isbn number
function openPage (isbn) {
  var base = 'https://www.amazon.ca/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords='
  window.open(base + isbn)
}

<h1>Amazon Bulk ISBN Search</h1>
<p>... note, after paste you may need to click outside the text area or tab out to fire the change event.</p>

<textarea id=numbers placeholder="paste isbn numbers as csv here">
</textarea>