How to toggle Angular material expansion panel programmatically

Question

I just started working on an Angular 4 project with material design.

I am currently working with the expansion component, the API states that a disabled expansion pa

Answer 1

You can set a var, in this case I used "isExpanded" then use it to open and close set the boolean value.

If you want to use it with the integrated toogle button instead you must update the "isExpanded" var with the "(opened)" and "(closed)" hooks from mat-expansion-panel.