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fix(material-experimental/mdc-select): fix floating label behavior #22134

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Mar 19, 2021
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5 changes: 3 additions & 2 deletions src/material-experimental/mdc-select/select.ts
Original file line number Diff line number Diff line change
Expand Up @@ -116,7 +116,7 @@ export class MatSelect extends _MatSelectBase<MatSelectChange> implements OnInit
get shouldLabelFloat(): boolean {
// Since the panel doesn't overlap the trigger, we
// want the label to only float when there's a value.
return !this.empty;
return this.panelOpen || !this.empty;
}

ngOnInit() {
Expand Down Expand Up @@ -147,11 +147,12 @@ export class MatSelect extends _MatSelectBase<MatSelectChange> implements OnInit
open() {
this._overlayWidth = this._getOverlayWidth();
super.open();
// Required for the MDC form field to pick up when the overlay has been opened.
this.stateChanges.next();
}

close() {
super.close();

// Required for the MDC form field to pick up when the overlay has been closed.
this.stateChanges.next();
}
Expand Down