fariba.j questions

• how to close a mat-accordion when other mat-accordion is opened?
• How to change a mat-progress-bar value in an interval?
• quill error 'quill Invalid Quill container'
• which file runs first in an angular 4 app when i run the app?
• EACCES: permission denied, mkdir '/node_modules/node-sass/build' while running npm install on ubuntu
• at least one field is required in angular 4 forms
• how to pass data from angular material dialog to parent component?

fariba.j answers