![angular - How do I set an initially opened expansion panel to be closed by default? - Stack Overflow angular - How do I set an initially opened expansion panel to be closed by default? - Stack Overflow](https://i.stack.imgur.com/zpuYM.gif)
angular - How do I set an initially opened expansion panel to be closed by default? - Stack Overflow
a disabled mat-expansion-panel cannot be expanded programmatically · Issue #18171 · angular/components · GitHub
![Angular material expansion panel inside accordion - dragged item looks like two items being dragged · Issue #102 · SortableJS/ngx-sortablejs · GitHub Angular material expansion panel inside accordion - dragged item looks like two items being dragged · Issue #102 · SortableJS/ngx-sortablejs · GitHub](https://user-images.githubusercontent.com/520883/40910898-43a6a764-67e5-11e8-836a-7f43cea64eb9.png)
Angular material expansion panel inside accordion - dragged item looks like two items being dragged · Issue #102 · SortableJS/ngx-sortablejs · GitHub
![mat-expansion-panel keeps contents of collapsed panels in DOM · Issue #20680 · angular/components · GitHub mat-expansion-panel keeps contents of collapsed panels in DOM · Issue #20680 · angular/components · GitHub](https://user-images.githubusercontent.com/3027415/94566715-f24f3c00-026a-11eb-9c09-139061cd4181.png)
mat-expansion-panel keeps contents of collapsed panels in DOM · Issue #20680 · angular/components · GitHub
a disabled mat-expansion-panel cannot be expanded programmatically · Issue #18171 · angular/components · GitHub
![Strange border on the first and last <mat-expansion-panel> children of <mat-accordion> when using the Chrome browser · Issue #14686 · angular/components · GitHub Strange border on the first and last <mat-expansion-panel> children of <mat-accordion> when using the Chrome browser · Issue #14686 · angular/components · GitHub](https://user-images.githubusercontent.com/52021/52476625-3a11e300-2bb0-11e9-8226-c56980a7b2e4.png)
Strange border on the first and last <mat-expansion-panel> children of <mat-accordion> when using the Chrome browser · Issue #14686 · angular/components · GitHub
mat-expansion-panel - styles get messed up if panel is a child of another element · Issue #13419 · angular/components · GitHub
![Angular Material 9|8 Add Expansion Panel and Accordion in Angular project using Material « Freaky Jolly Angular Material 9|8 Add Expansion Panel and Accordion in Angular project using Material « Freaky Jolly](https://www.freakyjolly.com/wp-content/uploads/2019/06/angular-material-expension-panel-demo.gif)