The onselect event handler of a textarea object executes some JavaScript code or function when a user selects some text in a textarea field.

The onkeyup event handler of textarea object executes some JavaScript code or function when a key released over the textarea object.

The onkeypress event handler of textarea object executes some JavaScript code or function when a key is pressed and released over the textarea object.

The onkeydown event handler of textarea object executes some JavaScript code or function when a key is pressed down over the textarea object.

The onfocus event handler of textarea object executes some JavaScript code or function when a textarea object receives focus either by the pointing device or by pressing tab key.

The onchange event handler of textarea object executes some JavaScript code or function when a textarea object loses the input focus and its value has been modified since gaining focus.

The onblur event handler of textarea object executes some JavaScript code or function when a textarea object loses focus either by the pointing device or by pressing tab key.

The select() method is used to select the input area of a textarea field.

The focus() method is used to set the focus to a textarea.

The blur() method is used to remove focus from a textarea.