How to fix “Uncaught TypeError: Cannot call method 'appendChild' of null”

Question

I am attempting to grab text from a HTML text area, and call the create() method when a \'Submit\' button is pressed. The method is trying to use the message from the text a

Answer 1

The error you are getting suggests that there is no element with the ID "comments" on your page. document.getElementById will return null when no element with such an ID is found, and thus cmd.appendChild(divTag) will be executed as null.appendChild(divTag).

If you are certain that the element exists, you may be executing your JavaScript that assigns the cmt variable before that element is created by the browser. To prevent that, standard practice is to place the