The HTML rows attribute is used to specify the visible height of the text area in lines in the <textarea> element.
Definition and Usage
➔ The rows attribute on the textarea element takes a positive integer value, which determines the number of lines of text that are visibly displayed without scrolling.
➔ The rows attribute takes a positive integer value
Syntax
//In HTML
<textarea rows="5" cols="50" id="sample">
This text area will display 5 visible lines.
</textarea>
//In Javascript
let element=document.querySelector("#sample");
element.rows = 10;
//or
element.setAttribute("rows", "10");