(courses-acidfree.html)
This page replaces the previous one inside the name="content" frame when you click Sample in the navbar.
name="content"
Use it to practise asserting that a frame's body changed after a click — watch for the new h1 text.
h1
Test idea: click Sample, then expect(frameContent.locator('h1')).toContainText('Sample content').
expect(frameContent.locator('h1')).toContainText('Sample content')