title: How does grid-row: 1 / -1 actually work? (references needed)
body: <p>generally i  used to bootstrap for frontend design..   i am using css grid layout since about half year. i did not face any problem like before or i did not think this way</p>
  <p>i read some article to find out  how exactly grid-row: 1 / -1 work or it's behaviour .. maybe be i skip it...
  maybe it's a bad question or already answer here</p>
  <p><strong><code>.grid-container &gt; div.item span { grid-row: 1 / -1 ; not working }</code> not working...</strong></p>
  <p><strong>note:</strong></p>
  <ol>
  <li>grid-row: 1 / span  number.. will not solve the problem. (undefined number of paragraph tag).</li>
  <li>if i write grid-row: 1 / 99999 .. a higher number . it will solve my problem.. maybe it's baad practice...</li>
  <li>grid-row: 1 / -1. not working...</li>
  </ol>
  <p><strong>need clear explanation of  it's behaviour or reliable source doc</strong></p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.grid-container {
    display: grid;
    grid-template-columns: repeat(2,1fr)  ;
    grid-gap: 10px;
    background-color: #2196F3;
    padding: 10px;
    animation: mymove 5s infinite;
  }
  
  .grid-container &gt; div.item {
     display: grid;
    grid-template-columns: max-content 1fr ;
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 20px 0;
    font-size: 30px;
  }
  .grid-container &gt; div.item span {
        /* grid-row: 1 / -1 ; not working */
       grid-row: 1 / 99999;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="grid-container"&gt;
    &lt;div class="item"&gt;
        &lt;span style="writing-mode: vertical-rl;"&gt;Tex&lt;/span&gt;
      &lt;h4 style&gt;Title&lt;/h4&gt;
      &lt;p&gt;Pargraph&lt;/p&gt;
       &lt;p&gt;Pargraph&lt;/p&gt;
    &lt;/div&gt;
    &lt;div class="item"&gt;
        &lt;span style="writing-mode: vertical-rl;"&gt; Tex&lt;/span&gt;
      &lt;h4&gt;Title&lt;/h4&gt;
      &lt;p&gt;Pargraph&lt;/p&gt;
       &lt;p&gt;Pargraph&lt;/p&gt;
       &lt;p&gt;Pargraph&lt;/p&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>