JavaScript not added

Hi,
I added this simple code to a WordPress post:
<button type="button" onClick="doSomething()">Do Something</button>

and in the

This code will be included verbatim in <script> tags at the end of your page’s (or post’s) …

form I added the following code:

function doSomething() {
	console.log('called')
}

I click Update Scripts and then Preview. In the preview page however, if I click the button, nothing happens, and the console shows: ReferenceError: doSomething is not defined. In fact, it turns out that my code is not present in the page. I’m using the Independent Publisher 2 theme. What could be the problem?