Material-UI drop-down menu causing error in IE11 after updating to angular 8
问题 Angular 8 application with material 8 throws following error on IE11 when the material menu is opened: Unable to get property 'opacity' of undefined or null reference It worked well with angular 7.2. Used IE11 Version: 11.1146.16299.0 Update version: 11.0.125 New project dependency versions: "dependencies": { "@angular/animations": "^8.0.0", "@angular/cdk": "^8.0.0", "@angular/common": "~8.0.0", "@angular/compiler": "~8.0.0", "@angular/core": "~8.0.0", "@angular/forms": "~8.0.0", "@angular