JavaScript – Change Text in Div to Bold

To change text in Div to bold using JavaScript, get reference to the div element, and assign element.style.fontWeight property with value of "bold".

Example

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head> 
<body>
    <h2>Change Text in Div to Bold in JavaScript</h2>
    <div id="myDiv">
        <p>Paragraph in Div.</p>
        <span>Span in Div.</span>
    </div>
    <br>
    <button type="button" onclick="changeStyle()">Click Me</button>
    <script>
    function changeStyle(){
        var element = document.getElementById("myDiv");
        element.style.fontWeight = "bold";
    }
    </script>
</body>
</html>

Conclusion

In this JavaScript Tutorial, we learned how to change text in a div to bold using JavaScript.