I have a textarea field, which I would like to automatically adjust according to number of lines used (i.e., if the user enters one line, the field height will show that line only, but if the user enters a long text, the field will show all the lines of text). I would like it to happen dynamically, without using scroll (overflow). I would appreciate help with this.
thanks
There are lots of ideas given in the answers pointed to in the comments so if you absolutely have to stick with textarea perhaps some of them will solve your problem but they require Javascript and I notice you have tagged CSS not JS.
So, have you considered using a contenteditable div instead? This will automatically resize depending on content without needing Javascript:
.input {
overflow: auto;
border: 1px solid black;
}<div class="input" contenteditable></div>