Removes focus from the control; keystrokes will subsequently go nowhere. I really like this technique – it is better than a lot of the others I have seen. position for which the coordinates should be calculated The span element is therefore the one we actually update with the contents of the textarea. resizes after a couple more chars are entered. Detect programmatic changes on input type text, Nvidia has acquired Arm. or the test.html. CSS to decorate the internal span to behave like a link: Create a textarea with a maximum number of characters per line and a maximum number of lines: First, create a function that takes the text field and a key event as input and determines if any of the limits have been reached. IE9 may not, but I believe IE8 does require the ms prefix for the box-sizing property.

(DEFAULT: false) How much should retail investors spend on financial data subscriptions? When focus is given to the textarea to the associated label moves above the textarea and the font shrinks. NOTE: This fork of textarea-caret-position - element (HTMLElement): the target element (textarea or input) Select text and then delete it by typing backspace or by using a keyboard command such as CTRL-X (cut). The pre text lags a little behind the textarea text. You can work around this by always making it a line taller than it needs to be in Opera on Mac; just add the following code to the top of the makeExpandingArea function (sadly there’s no way to do feature detection for this): Lastly, because the textarea is positioned directly over the pre, you can extend this to do funky stuff such as syntax highlighting as you type; if you parse the value and split it into different tags before adding it to the pre, you can apply different colors to different sections. Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Conversations with Robots: Voice, Smart Agents & the Case for Structured Content, https://github.com/bgrins/ExpandingTextareas, http://www.mastercode.nl/forum/artikelen-javascript/verlengbare-tekstvelden-netjes-gemaakt-t2205.html, https://s3-us-west-1.amazonaws.com/sturgisweb-portfolio/public/ios1.png, https://s3-us-west-1.amazonaws.com/sturgisweb-portfolio/public/ios2.png, Color Craft & Counterpoint: A Designer’s Life with Color Vision Deficiency, Building the Woke Web: Web Accessibility, Inclusion & Social Justice, The height is calculated by guessing where wrapping occurs based on the, The height is recalculated and set only on the, The required height is calculated based on the. Adding the CSS “-webkit-apparance: none” to the textarea might well fix it. Single line input fields can have their type set to different types beside text, like email, urls or phone numbers. It includes support for minimum and maximum height settings. I used them to toggle the active state of the textarea's label. Is it possible to detect when a textarea value has been changed with JavaScript? Tip: Use the document.addEventListener() method to attach an event handler to the document. Textareas are a fundamental input field, used on forms everywhere. Most forms are composed of a parent form element, a handful of input elements and maybe a textarea or two. In the best tradition of graceful degradation, users without JavaScript enabled will get a fixed height textarea (with the height set in the CSS), with scrollbars appearing when the content overflows: A note on delegation: you can easily set this up with a single event listener on the document node and use event delegation to handle multiple expanding text areas efficiently, but only if you’re not supporting IE8 or below, as Microsoft, in their infinite wisdom, did not make the onpropertychange event bubble. //NOTE if no require function is available, the module will be exported.