Question

You cannot collapse or expand the panels
expand the panels as per your requirement. true or false​

Answer 1

The assertion is wrong but the reason is the correct expansion.

Explanation:

• In the header, there is a control room for expanding and collapsing the panel.
• This is called mat-expansion-panel-header.
• In this panel, there is an option named mat-panel-title> and an <mat-panel-description>.
• These options are sued to align the header with material designs and its specification.
• By default, there is also an expansion panel header to indicate expansion.