How to change FontSize By JavaScript?

This code is not working

var span = document.getElementById("span"); span.style.fontsize = "25px"; span.innerHTML = "String"; 

5 Answers

JavaScript is case sensitive.

So, if you want to change the font size, you have to go:

span.style.fontSize = "25px"; 

<span>HOI</span> <script> var span = document.getElementById("span"); console.log(span); span.style.fontSize = "25px"; span.innerHTML = "String"; </script> 

You have two errors in your code:

1. document.getElementById - This retrieves the element with an Id that is "span", you did not specify an id on the span-element.

2. Capitals in Javascript - Also you forgot the capital of Size.

try this:

var span = document.getElementById("span"); span.style.fontSize = "25px"; span.innerHTML = "String"; 

Please never do this in real projects😅:

document.getElementById("span").innerHTML = "String".fontsize(25);

<span></span>

span.style.fontSize = "25px"; 

use this