This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The cols property of the HTMLTextAreaElement interface is a positive integer representing the visible width of the multi-line text control, in average character widths. It reflects the <textarea> element's cols attribute.
A positive integer. Defaults to 20.
const textareaElement = document.getElementById("comment");
textArea.cols = 80;
| Specification |
|---|
| HTML> # dom-textarea-cols> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
cols |
1 | 12 | 1 | ≤12.1 | 1 | 18 | 4 | ≤12.1 | 1 | 1.0 | 4.4 | 1 |
<textarea>HTMLTextAreaElement.rowsHTMLTextAreaElement.wrapresize property
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLTextAreaElement/cols