如果可能，我会尝试从其他脚本中调用所需的函数.但是，如果您真的想听元素上的更改，则可以使用DOMSubtreeModified.如果您通过jQuery更改内容，尽管它将调用您的函数两次！因此，请使用普通JavaScript更改内容.

If possible I would try to call the wished function from the other script. But if you really want to listen for changes on the element you can make use of DOMSubtreeModified. If you change the content via jQuery though it will call your function twice! Therefore use vanilla JavaScript for changing the content.

function versandkosten() {
    console.log('called versandkosten');
}
$(document).ready(function(){
  var $basketAmount = $('.basket_amount');
  $basketAmount.bind("DOMSubtreeModified", versandkosten);

  // test changing the content of the element via JavaScript
  $basketAmount[0].innerHTML = 77;

  // changing it via jQuery would call it twice!
  // $basketAmount.html(77);
});

提琴: https://jsfiddle.net/9our3m8a/

尽管这仍然应该起作用，但是请注意，DOMSubtreeModified已被弃用，另请参见

While this should still work, be aware that DOMSubtreeModified has been deprecated see also Mozilla Doc. Thx to @LuisEduardox for pointing this out.