Ionic team release the latest version Ionic 4.1 Hydrogen, in which they have introduced Checkbox Indeterminate state. Indeterminate state is mostly used in Master checkbox which indicates the child checkbox list.
Indeterminate checkbox state indicates that not all but some of the checkboxes are checked.
Continue reading Ionic 4 | How to Select All/ Unselect All Checkboxes with Indeterminate in Ionic 4
