Baseline Widely available
The value property of the HTMLTextAreaElement interface represents the value of the <textarea> element as a string, which is an empty string if the widget contains no content. It returns or sets the raw value contained in the control.
A string containing the contents of the <textarea> element.
const textareaElement = document.getElementById("comment");
const oldText = textArea.value;
textArea.value = oldText.toUpperCase();
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