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How to set textarea scroll bar to bottom as a default using JavaScript/jQuery ?
  • Last Updated : 31 Oct, 2019

Given an HTML document containing <textarea> element and the task is to set the position of scrollbar to bottom of <textarea> with the help of jQuery.

Approach 1:

  • Get the scrollHeight property of the textarea.
  • Use scrollTop property to set the position of vertical scrollbar using jQuery.

Example: This example implements the above approach.




<!DOCTYPE HTML> 
<html
  
<head
    <title
        JavaScript | Set textarea scroll
        bar to bottom as a default.
    </title>
      
    <script src
    </script>
      
    <style>
        #t {
            height: 100px;
            width: 300px;
            background: green;
            color: white;
            text-align:justify;
        }
    </style>
</head
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <textarea id = "t">
        GeeksforGeeks is a Computer Science
        portal for geeks. It contains well
        written, well thought and well 
        explained computer science and
        programming articles, quizzes etc. 
        It also contains the practice section
        which is helpful for practicing the
        data structure and algorithms
        questions. GeeksforGeeks provides
        placement course, DSA class, Machine
        learning class and other online and
        offline courses which will help in
        placement and also growing the
        knowledge.
    </textarea>
      
    <br>
      
    <button onclick = "gfg_Run()"
        click here
    </button>
      
    <p id = "GFG_DOWN" style = "color:green;
        font-size: 20px; font-weight: bold;">
    </p>
      
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
          
        el_up.innerHTML = "Click on the button to set "
                + "the scroll bar to bottom";
          
        function gfg_Run() {
            $(document).ready(function(){
                var $text = $('#t');
                $text.scrollTop($text[0].scrollHeight);
            });
              
            el_down.innerHTML = 
                "Scroll bar is moved to bottom.";
        }         
    </script
</body
  
</html>

Output:

  • Before clicking on the button:
  • After clicking on the button:

Approach 2:

  • This example is doing the same job by JavaScript.
  • Get the scrollHeight property of the textarea.
  • Use scrollTop property to set the position of vertical scrollbar.

Example: This example implements the above approach.




<!DOCTYPE HTML> 
<html
  
<head
    <title
        JavaScript | Set textarea scroll bar to bottom as a default.
    </title>
      
    <script src
    </script>
      
    <style>
        #t {
            height: 100px;
            width: 300px;
            background: green;
            color: white;
            text-align:justify;
        }
    </style>
</head
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <textarea id = "t">
        GeeksforGeeks is a Computer Science
        portal for geeks. It contains well
        written, well thought and well 
        explained computer science and
        programming articles, quizzes etc. 
        It also contains the practice section
        which is helpful for practicing the
        data structure and algorithms
        questions. GeeksforGeeks provides
        placement course, DSA class, Machine
        learning class and other online and
        offline courses which will help in
        placement and also growing the
        knowledge.
    </textarea>
      
    <br>
      
    <button onclick = "gfg_Run()"
        click here
    </button>
      
    <p id = "GFG_DOWN" style = "color:green;
        font-size: 20px; font-weight: bold;">
    </p>
      
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
          
        el_up.innerHTML = "Click on the button to set"
                + "the scroll bar to bottom";
          
        function gfg_Run() {
            var text = document.getElementById('t');
            text.scrollTop = text.scrollHeight;
            el_down.innerHTML = "Scroll bar is moved to bottom.";
        }         
    </script
</body
  
</html>

Output:

  • Before clicking on the button:
  • After clicking on the button:



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