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forms - 当另一个字段有反馈时，为什么 bootstrap-4 输入组会拉伸？

问题描述

我有一个可以在一行中包含多个输入组的表单。我正在尝试使用无效反馈（类）来提供表单反馈，但是当我这样做时，相邻字段会垂直拉伸。下面的代码是一个简单的 2 行 2 个输入示例，显示了当右列有反馈时左列是如何被拉伸的。我真的很感激这方面的一些帮助。

<div class="container mt-3">
  <div class="row">
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon1">First:</span>
      </div>
      <input type="text" class="form-control" placeholder="First" aria-label="First" aria-describedby="basic-addon1">
      <div class="invalid-feedback">Should not show</div>
    </div>
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon2">Second:</span>
      </div>
      <input type="text" class="form-control is-invalid" placeholder="Second" aria-label="Second" aria-describedby="basic-addon2">
      <div class="invalid-feedback">Some text</div>
    </div>
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon3">Third:</span>
      </div>
      <select class="form-control" id="exampleFormControlSelect1" aria-describedby="basic-addon3">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select>
      <div class="invalid-feedback">Should not show</div>
    </div>
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon4">Fourth:</span>
      </div>
      <input type="text" class="form-control is-invalid" placeholder="Fourth" aria-label="Fourth" aria-describedby="basic-addon4">
      <div class="invalid-feedback">Some other text</div>
    </div>
  </div>
</div>

jsfiddle：https ://jsfiddle.net/8e2uo4jL/

标签： formsbootstrap-4feedback

解决方案

我不知道这是否是您需要的，但您应该使用align-self-start并启用d-flex：

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container mt-3">
  <div class="row">
    <div class="input-group mb-3 col-6 align-self-start d-flex">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon1">First:</span>
      </div>
      <input type="text" class="form-control" placeholder="First" aria-label="First" aria-describedby="basic-addon1">
      <div class="invalid-feedback">Should not show</div>
    </div>
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon2">Second:</span>
      </div>
      <input type="text" class="form-control is-invalid" placeholder="Second" aria-label="Second" aria-describedby="basic-addon2">
      <div class="invalid-feedback">Some text</div>
    </div>
    <div class="input-group mb-3 col-6 align-self-start d-flex">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon3">Third:</span>
      </div>
      <select class="form-control" id="exampleFormControlSelect1" aria-describedby="basic-addon3">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select>
      <div class="invalid-feedback">Should not show</div>
    </div>
    <div class="input-group mb-3 col-6">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon4">Fourth:</span>
      </div>
      <input type="text" class="form-control is-invalid" placeholder="Fourth" aria-label="Fourth" aria-describedby="basic-addon4">
      <div class="invalid-feedback">Some other text</div>
    </div>
  </div>
</div>

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