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HTML `<textarea>` Not Adjusting Height Dynamically on Input Events with CSS Flexbox

๐Ÿ‘€ Views: 434 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-14
html css javascript JavaScript

I'm converting an old project and I tried several approaches but none seem to work. I'm facing an issue where a `<textarea>` is not adjusting its height dynamically as I type, particularly when it's inside a flexbox container. I'm using CSS to create a responsive layout, and I have a script that should resize the `<textarea>` based on the content. However, it only works intermittently, and sometimes the height does not adjust at all. Hereโ€™s my current setup: ```html <div class="flex-container"> <textarea id="dynamic-textarea" rows="1" style="flex: 1;"></textarea> </div> ``` ```css .flex-container { display: flex; flex-direction: column; height: 100%; } ``` Alongside this, I have the following JavaScript to handle the input event: ```javascript const textarea = document.getElementById('dynamic-textarea'); textarea.addEventListener('input', function() { this.style.height = 'auto'; // Reset height this.style.height = `${this.scrollHeight}px`; // Set to scroll height }); ``` When I start typing, the height increases correctly for a while, but it seems to stop resizing after reaching a certain point. Iโ€™m also seeing a flicker effect where the height quickly sets to a smaller size before adjusting, which is not the experience I want. Iโ€™ve tried various approaches, such as using `setTimeout` to delay the height adjustment, but that doesnโ€™t seem to help. How can I ensure that the `<textarea>` consistently adjusts its height based on the content in a flexbox layout? Any suggestions or workarounds would be greatly appreciated. I'm currently testing this on Chrome 89.0 and Firefox 87.0. Any examples would be super helpful. I'm working with Javascript in a Docker container on macOS. I'd really appreciate any guidance on this.