JavaScript – Change the Font Size of Paragraph

To change the font size of a paragraph using JavaScript, get the reference to the element, and assign the specific font size value to the element.style.fontSize property.

Example

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head> 
<body>
    <p id="myPara">Change the Font Size of Paragraph in JavaScript</p>
    <button type="button" onclick="changeStyle()">Click Me</button>
    <script>
    function changeStyle(){
        var element = document.getElementById("myPara");
        element.style.fontSize = "20px";
    }
    </script>
</body>
</html>
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Conclusion

In this JavaScript Tutorial, we learned how to change the font size of a paragraph using JavaScript.