Equal height rows in a flex container
<p>As you can see, the <code>list-items</code> in the first <code>row</code> have same <code>height</code>. But items in the second <code>row</code> have different <code>heights</code>. I want all items to have a uniform <code>height</code>.</p>

<p>Is there any way to achieve this without giving <strong>fixed-height</strong> and only using <strong>flexbox</strong>?</p>

<p><a href="https://i.stack.imgur.com/KVxvj.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KVxvj.png" alt="enter image description here"></a></p>

<p>Here is my <code>code</code> </p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>.list {
  display: flex;
  flex-wrap: wrap;
  max-width: 500px;
}
.list-item {
  background-color: #ccc;
  display: flex;
  padding: 0.5em;
  width: 25%;
  margin-right: 1%;
  margin-bottom: 20px;
}
.list-content {
  width: 100%;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;ul class="list"&gt;
  &lt;li class="list-item"&gt;
    &lt;div class="list-content"&gt;
      &lt;h2&gt;box 1&lt;/h2&gt;
      &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit.&lt;/p&gt;
    &lt;/div&gt;
  &lt;/li&gt;
  &lt;li class="list-item"&gt;
    &lt;div class="list-content"&gt;
      &lt;h3&gt;box 2&lt;/h3&gt;
      &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit.&lt;/p&gt;
    &lt;/div&gt;
  &lt;/li&gt;

  &lt;li class="list-item"&gt;
    &lt;div class="list-content"&gt;
      &lt;h3&gt;box 2&lt;/h3&gt;
      &lt;p&gt;Lorem ipsum dolor&lt;/p&gt;
    &lt;/div&gt;
  &lt;/li&gt;

  &lt;li class="list-item"&gt;
    &lt;div class="list-content"&gt;
      &lt;h3&gt;box 2&lt;/h3&gt;
      &lt;p&gt;Lorem ipsum dolor&lt;/p&gt;
    &lt;/div&gt;
  &lt;/li&gt;
  &lt;li class="list-item"&gt;
    &lt;div class="list-content"&gt;
      &lt;h1&gt;h1&lt;/h1&gt;
    &lt;/div&gt;
  &lt;/li&gt;
&lt;/ul&gt;</code></pre>
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