Javascript 如何减少重复的jquery代码

使用局部变量作为所有正在处理的对象的“基础”结果。然后，您可以创建一个函数来处理重复输入的步骤

jQuery('#edit-field-number-of-beneficial-owner-und').change(function() {
  if (jQuery(this).val() == 0) {
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-one').nextUntil('.form-actions').find('input, select, textarea').val('');
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-one').nextUntil('.form-actions').find('input:checkbox').attr('checked', false);
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-one').nextUntil('.form-actions').find('select').trigger("chosen:updated");
  } else if (jQuery(this).val() == 1) {
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-two').nextUntil('.form-actions').find('input, select, textarea').val('');
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-two').nextUntil('.form-actions').find('input:checkbox').attr('checked', false);
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-two').nextUntil('.form-actions').find('select').trigger("chosen:updated");
  } else if (jQuery(this).val() == 2) {
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-three').nextUntil('.form-actions').find('input, select, textarea').val('');
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-three').nextUntil('.form-actions').find('input:checkbox').attr('checked', false);
    jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings('#edit-field-beneficial-owner-three').nextUntil('.form-actions').find('select').trigger("chosen:updated");
  }
});

---

正如前面指出的，简化代码的主要方法是将中间步骤存储在变量中。我想在数据结构中添加封装条件检查：

jQuery('#edit-field-number-of-beneficial-owner-und').change(function() {
  let numOwner = jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner');
  let handle = function(sibs) {
    sibs.nextUntil('.form-actions').find('input, select, textarea').val('');
    sibs.nextUntil('.form-actions').find('input:checkbox').attr('checked', false);
    sibs.nextUntil('.form-actions').find('select').trigger("chosen:updated");
  }

  if (jQuery(this).val() == 0) {
    handle(numOwner.siblings('#edit-field-beneficial-owner-one'))
  } else if (jQuery(this).val() == 1) {
    handle(numOwner.siblings('#edit-field-beneficial-owner-two'))
  } else if (jQuery(this).val() == 2) {
    handle(numOwner.siblings('#edit-field-beneficial-owner-three'))
  }
});

---

有很多方法可以解决这个问题。这里有一个例子

---

将值0-2映射到等效字符串中。使用该值作为数组的索引以获取字符串（请注意允许使用的回标记）。将一长串jQuery调用存储到一个变量中，并将该变量用于

find（）

调用

jQuery('#edit-field-number-of-beneficial-owner-und').change(function() {
    const $this = jQuery(this);
    const labels = ['one', 'two', 'three'];
    const target = $this.parent()
        .parent('#edit-field-number-of-beneficial-owner')
        .siblings(`#edit-field-beneficial-owner-${labels[+$this.val()]}`)
        .nextUntil('.form-actions');

    target
        .find('input, select, textarea')
        .val('');

    target
        .find('input:checkbox')
        .attr('checked', false);

    target
        .find('select')
        .trigger('chosen:updated');
});

---

我会错过这个节目吗？荣誉删除了我自己的答案。你的代码正在运行。非常感谢你。但我必须检查20个人。“将一长串的jQuery调用存储到一个变量中，并将该变量用于find（）调用。”正在运行。但整个代码都不起作用。我不知道哪一部分错了。但似乎一切都是正确的。

jQuery('#edit-field-number-of-beneficial-owner-und').change(function() {
  let ownerMap = ['one', 'two', 'three']
  let owner = jQuery(this).val()

  let formAction = jQuery(this).parent().parent('#edit-field-number-of-beneficial-owner').siblings(`#edit-field-beneficial-owner-${ownerMap[owner]}`).nextUntil('.form-actions')
  formAction.find('input, select, textarea').val('');
  formAction.find('input:checkbox').attr('checked', false)
  formAction.find('select').trigger("chosen:updated")
});