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How to change font-weight of a text using JavaScript ?
  • Last Updated : 25 Dec, 2020

In this article, we will set the font-weight of a text dynamically using JavaScript. Ti change the font weight dynamically, we use HTML DOM Style fontWeight property. 

Syntax:

object.style.fontWeight = "value"

Property Values:

  • normal: The font weight is the default value.
  • lighter: The font weight is the lighter than normal.
  • bold: The font weight is bolder than normal.
  • bolder:  The font weight is bolder than bold.
  • value:  It defines from 100 to 900 where 400 is normal value.
  • initial:  It sets to its default font weight.
  • inherit:  It inherits this property from its parent element.

Example:

HTML

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<!DOCTYPE html>
<html>
  
<head>
    <title>
        How to change font-weight of
        a text using JavaScript?
    </title>
</head>
  
<body style="text-align: center;">
  
    <h1 style="color: green">
        GeeksforGeeks
    </h1>
  
    <h2>
        How to change font-weight of
        <br>a text using JavaScript?
    </h2>
  
    <p id="sudo">Welcome to GeeksforGeeks</p>
  
    <br>
  
    <button type="button" onclick="myGeeks()">
        Click to change
    </button>
  
    <script>
        function myGeeks() {
            document.getElementById("sudo")
                .style.fontWeight = "bold";
        
    </script>
</body>
  
</html>

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Output:



Before Click the Button:

After Click the Button:

Supported Browsers:

  • Google Chrome
  • Internet Explorer
  • Mozilla Firefox
  • Opera
  • Safari

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