From Web Education Community Group
The <textarea> element represents a multiline plain text edit control for the element's raw value.
Allows the author to indicate that a control is to be focused as soon as the page is loaded
cols= valid non-negative integer
specifies the expected maximum number of characters per line. by defult, it is 20.
If present, make the control non-interactive and to prevent its value from being submitted.
form= the ID of a form element in the element's owner
Associate the textarea element with its form owner.
By default, the textarea element is associated with its nearest ancestor form element.
name= unique name
Represents the element's name.
placeholder= sample value or a brief description of the expected format
Represents a hint (a word or short phrase) intended to aid the user with data entry.
The placeholder attribute should not be used as an alternative to a label.
Control whether the text can be edited by the user or not.
When specified, the user will be required to enter a value before submitting the form.
rows= valid non-negative integer
Specifies the number of lines to show. by defult, it is 2.
wrap= soft/ hard
The Soft state indicates that the text in the textarea is not to be wrapped when it is submitted (though it can still be wrapped in the rendering).
The Hard state indicates that the text in the textarea is to have newlines added by the user agent so that the text is wrapped when it is submitted.
If the element's wrap attribute is in the Hard state, the cols attribute must be specified.
See also global attributes.
Here is an example of a textarea being used for unrestricted free-form text input in a form [try it]:
<p>If you have any comments, please let us know: <textarea cols="80" name="comments"></textarea> </p>
The HTML5 specification defines the <textarea> element in 4.10.13 The textarea element.