How to include filter in mat select nested values using angular

问题

I'm using angular material with nested dropdowns. The dropdown values nested with parent and child basis.

I'm facing two issues.

1. Auto suggestion is not working. If I type parent name or its associated child name, have to filter and show the particular parent view with expand mode.

2. If i expand first parent and trying to expand the second parent, the first parent view should close automatically while expanding the second one.

Please find the stackblitz link https://stackblitz.com/edit/angular-f5mizr-9fpccz which i am using to do the sample.

Anyone help will be appreciated!!!!

回答1:

For your 1st requirement mat-select won't work. You have to use mat-autocomplete.

Please find my solution here: https://stackblitz.com/edit/angular-f5mizr-final-flcevo

来源：https://stackoverflow.com/questions/63172621/how-to-include-filter-in-mat-select-nested-values-using-angular