Answers for "how to make textarea not scaleable"

css textarea not resizable

-- CSS --
resize: none;

-- HTML --
<textarea style="resize: none;"></textarea>

make textarea not resizable

You can either apply this as an inline style property like so: 
<textarea style="resize: none;"></textarea>
or in between 
<style>...</style> element tags like so: 
textarea { resize: none; }