图像不居中，边缘自动应用。

Question

尝试使用CSS将图片移动到页面的中心。我将这些值应用于图像，但没有成功。见下面的代码：

HTML：

<div class="list_of_reviews">
<ul style="list-style-type:none">
<li>What will happen to Brittish travelers when Brexit finaly happens</li>
</ul>
</div>
<img class="image_1" src="for left column.jpg" alt="What will happen to Brittish travelers when Brexit finaly happens"/>

CSS：

.list_of_reviews {
    margin:80px auto;
    font-family: "Times New Roman", Times, Serif;
    line-height: 1.5;
    font-size: 30px;
    width: 40%;     
    border:solid;
}


.image_1 {
    margin:auto;
    height:200px;
    width:350px;
    position:relative;
}

真的很感激，请直截了当地回答，不要降级。

Answer 1

要使margin: 0 auto工作，您需要添加display: block。

​

.list_of_reviews {
  margin: 80px auto;
  font-family: "Times New Roman", Times, Serif;
  line-height: 1.5;
  font-size: 30px;
  width: 40%;
  border: solid;
}
.image_1 {
  display: block;
  margin: auto;
  height: 200px;
  width: 350px;
  position: relative;
}

<div class="list_of_reviews">
  <ul style="list-style-type:none">
    <li>What will happen to Brittish travelers when Brexit finaly happens</li>
  </ul>
</div>
<img class="image_1" src="http://placehold.it/350x200" alt="What will happen to Brittish travelers when Brexit finaly happens" />

​

编辑：

实际上..。

如果可以避免，请不要更改元素的默认行为。尽可能多地保持自然文档中的元素流。

由于默认情况下图像的行为与文本类似，所以最好这样做：

​

.list_of_reviews {
  margin: 80px auto;
  font-family: "Times New Roman", Times, Serif;
  line-height: 1.5;
  font-size: 30px;
  width: 40%;
  border: solid;
}
figure {
  text-align: center;
}
.image_1 {
  height: 200px;
  width: 350px;
  position: relative;
}

<div class="list_of_reviews">
  <ul style="list-style-type:none">
    <li>What will happen to Brittish travelers when Brexit finaly happens</li>
  </ul>
</div>
<figure>
  <img class="image_1" src="for left column.jpg" alt="What will happen to Brittish travelers when Brexit finaly happens" />
</figure>

​

Answer 2

默认情况下，<img>设置为display: inline; (尽管它们在技术上具有特定的display: inline-block;属性- https://stackoverflow.com/a/2402773/3997209 )。

您可以很容易地将其覆盖到display: block;，所需的布局将工作：https://jsfiddle.net/er13qobj/

Answer 3

相反，我建议这样做，尽管它觉得很傻，但仍然有效，

<div class="list_of_reviews">
<ul style="list-style-type:none">
<li>What will happen to Brittish travelers when Brexit finaly happens</li>
</ul>
</div>
<center>
<img src="for left column.jpg" alt="What will happen to Brittish travelers when Brexit finaly happens"/>
</center>