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Angular material expansion panel inside accordion - dragged item looks like two items being dragged · Issue #102 · SortableJS/ngx-sortablejs · GitHub
mat-expansion-panel-header :hover style sticks after expansion · Issue #14047 · angular/components · GitHub
bug(mat-expansion-panel): Focus and hover backgrounds cannot be overridden in CSS · Issue #18920 · angular/components · GitHub
![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
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Accessibility: Expansion-panel header is not marked as focused when tabbing. · Issue #14569 · angular/components · GitHub
mat-expansion-panel-header :hover style sticks after expansion · Issue #14047 · angular/components · GitHub
![bug(mat-expansion-panel): Focus and hover backgrounds cannot be overridden in CSS · Issue #18920 · angular/components · GitHub bug(mat-expansion-panel): Focus and hover backgrounds cannot be overridden in CSS · Issue #18920 · angular/components · GitHub](https://user-images.githubusercontent.com/17689719/77585140-4e17c180-6ee4-11ea-8c8f-6514bc653429.png)
bug(mat-expansion-panel): Focus and hover backgrounds cannot be overridden in CSS · Issue #18920 · angular/components · GitHub
Create a beautiful hover-triggered expandable sidebar with simple HTML, CSS, and Javascript | by 9cv9 official | Medium
![javascript - Change ExpansionPanel arrow color on expanded parent ExpansionPanel in material-ui - Stack Overflow javascript - Change ExpansionPanel arrow color on expanded parent ExpansionPanel in material-ui - Stack Overflow](https://i.stack.imgur.com/rjax0.png)
javascript - Change ExpansionPanel arrow color on expanded parent ExpansionPanel in material-ui - Stack Overflow
![mat-expansion-panel "opens" with angular enter-leave animations, although current state is closed. · Issue #11765 · angular/components · GitHub mat-expansion-panel "opens" with angular enter-leave animations, although current state is closed. · Issue #11765 · angular/components · GitHub](https://user-images.githubusercontent.com/3656278/53063817-619f6000-347a-11e9-9e88-19d896beeb16.png)
mat-expansion-panel "opens" with angular enter-leave animations, although current state is closed. · Issue #11765 · 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)
Angular Material 9|8 Add Expansion Panel and Accordion in Angular project using Material « Freaky Jolly
![Accessibility: Expansion-panel header is not marked as focused when tabbing. · Issue #14569 · angular/components · GitHub Accessibility: Expansion-panel header is not marked as focused when tabbing. · Issue #14569 · angular/components · GitHub](https://user-images.githubusercontent.com/604690/50208049-770be700-0370-11e9-91bf-47655e30350d.png)