Auto-Growing Inputs & Textareas

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March 25th, 2020 admin Leave a comment Go to comments

By default, and </code> elements don’t change size based on the content they contain. In fact, there isn’t any simple HTML or CSS way to make them do that. Kinda funny, as that seems like a reasonable use-case. But of course, there are ways, my friend. <em>There are always ways</em>. </p> <p><span></span></p> <p>I was thinking about this after Remy Sharp <a target="_blank" href="https://remysharp.com/2020/03/06/auto-growing-inputs">blogged about it</a> recently in the context of inline <code></code> elements. </p> <h3>Non-input elements expand naturally</h3> <p>It’s weird to me that there is no way to force an input element to mimic this behavior, but alas.</p> <p>We can make any element editable and input-like with the <code>contenteditable</code> attribute:</p> <pre><code><span class="input" role="textbox" contenteditable> 99 </span></code></pre> <p>That <code><span></code> will naturally grow to be the width it needs to be for the content it contains. If it was a <code></p> <div></code> or any other element that is block-level, it would also expand vertically as needed. </p> <h3>But are non-input elements accessible?</h3> <p>I’m not entirely sure. Notice I put <code>role="textbox"</code> on the element. That’s just a best-guess based on <a target="_blank" href="https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/textbox_role">some docs</a>. </p> <p>Even if that’s helpful…</p> <ol> <li>What about the fact that forms can be submitted with the Enter key? </li> <li>What about the idea that form data is often serialized and sent along, while the code that’s doing it probably isn’t looking for a span?</li> <li>Does it <em>actually</em> read the same as an input in a screen reader?</li> <li>What other things<a target="_blank" href="https://css-tricks.com/#fn:1">¹</a> do inputs naturally do that I’m not thinking of?</li> </ol> <p>As attracted as I am to the idea that we can get auto-resizing for free from the browser by using non-input elements, I’m also a little worried about (my) unknown usability and accessibility risk.</p> <h3>Resizing actual input elements</h3> <p>So let’s say we stick with <code></code> and <code><textarea></code>. Can we make them resize-able even though it’s not particularly natural? </p> <p>One idea I had is to wrap the input in a relative inline parent and absolutely position it inside. Then, with JavaScript, we could sync the input value with a hidden span inside that wrapper, pushing the width wider as needed.</p> <p>For textareas, one classic technique is to count the number of line-breaks, use that to set the height, then multiply it by the line-height. That works great for preformatted text, like code, but not at all for long-form paragraph-like content. </p> <p>Here are all these ideas combined.</p> <div>CodePen Embed Fallback</div> <h3>Other ideas</h3> <p><a target="_blank" href="https://codepen.io/shshaw">Shaw</a> has a little JavaScript one-liner that is <em>very clever</em>. The JavaScript sets a <code>data-*</code> attribute on the element equal to the value of the input. The input is set within a CSS grid, where that grid is a pseudo-element that uses that <code>data-*</code> attribute as its content. That content is what stretches the grid to the appropriate size based on the input value. </p> <div>CodePen Embed Fallback</div> <h3>Your ideas</h3> <p>I absolutely know that you fellow web nerds have solved this six ways to Sunday. Let’s see ’em in the comments.</p> <div> <div> <ol> <li><a target="_blank" href="https://ericwbailey.design/">Eric Bailey</a> hit me up with a few thoughts off the top of his head: (1) There’s no accessible name. (2) It probably won’t work with voice control. (3) It will get ignored in High Contrast Mode. </li> </ol> </div> </div> <p>The post <a target="_blank" rel="nofollow" href="https://css-tricks.com/auto-growing-inputs-textareas/">Auto-Growing Inputs & Textareas</a> appeared first on <a target="_blank" rel="nofollow" href="https://css-tricks.com/">CSS-Tricks</a>.</p> <div class="fixed"></div> </div> <div class="under"> <span class="categories">Categories: </span><span><a href="http://www.webmastersgallery.com/category/design/" rel="category tag">Designing</a>, <a href="http://www.webmastersgallery.com/category/uncategorized/" rel="category tag">Others</a></span> <span class="tags">Tags: </span><span></span> </div> </div>   <script type="text/javascript" src="http://www.webmastersgallery.com/wp-content/themes/inove/js/comment.js"></script> <div id="comments"> <div id="cmtswitcher"> <a id="commenttab" class="curtab" href="javascript:void(0);" onclick="MGJS.switchTab('thecomments,commentnavi', 'thetrackbacks', 'commenttab', 'curtab', 'trackbacktab', 'tab');">Comments (0)</a> <a id="trackbacktab" class="tab" href="javascript:void(0);" onclick="MGJS.switchTab('thetrackbacks', 'thecomments,commentnavi', 'trackbacktab', 'curtab', 'commenttab', 'tab');">Trackbacks (0)</a> <span class="addcomment"><a href="#respond">Leave a comment</a></span> <span class="addtrackback"><a href="http://www.webmastersgallery.com/2020/03/25/auto-growing-inputs-textareas/trackback/">Trackback</a></span> <div class="fixed"></div> </div> <div id="commentlist">  <ol id="thecomments"> <li class="messagebox"> No comments yet. </li> </ol>   <ol id="thetrackbacks"> <li class="messagebox"> No trackbacks yet. </li> </ol> <div class="fixed"></div>  </div> </div> <div id="comment_login" class="messagebox"> You must be <a href="http://www.webmastersgallery.com/wp-login.php">logged in</a> to post a comment. </div> <div id="postnavi"> <span class="prev"><a href="http://www.webmastersgallery.com/2020/03/25/an-introduction-to-mdxjs/" rel="next">An Introduction to MDXJS</a></span> <span class="next"><a href="http://www.webmastersgallery.com/2020/03/25/how-should-designers-learn-to-code-git-htmlcss-engineering-principles-part-2/" rel="prev">How Should Designers Learn To Code? 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