help(mat-tree-node): Dynamically filling the tree using service cause 1 "selected" object to disappear from screen #20122
Description
What are you trying to do?
I want to use mat-tree-node to present selected nodes from main tree, also as trees. I'm getting the values using Subscription like :
this.chosenProjectsPhasesOrTasksService.getListOfChosenElements().subscribe((value: TreeDataModel[]) => {
console.log(value)
this.dataSource.data = [];
console.log(this.dataSource.data)
this.dataSource.data = JSON.parse(JSON.stringify(value));
console.log(this.dataSource.data)
});
and I can see for example that this.dataSource.data has 4 elements, but on the screen there are only 3
What troubleshooting steps have you tried?
After choosing first value I got it on screen - It's ok. But when I choose more values, then the first one disappears from the screen even though it's still in this.dataSource.data as I've checked in console.log
Environment
- Angular: 7.2.0
- CDK/Material: 7.2.0
- Browser(s): chrome, firefox
- Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu