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3 changes: 3 additions & 0 deletions packages/ide/src/fill/dialog.ts
Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,9 @@ export class Dialog {
* Show the dialog.
*/
public show(): void {
if (document.querySelector(`.${this.overlay.className}`)) {
throw new Error ("Overlay is already open");
}
if (!this.cachedActiveElement) {
this.cachedActiveElement = document.activeElement as HTMLElement;
(document.querySelector(".monaco-workbench") || document.body).appendChild(this.overlay);
Expand Down