Thank you so much Yavor, that was really helpful ^^
but the problem is that if I check “select all” and then click on “Delete” I get an error ->Uncaught Error: Invalid Item Index
[x]  | Name | Color   | Pixels  | Status |
[x] | Alice  | Yellow | 324233 |   On    |
[x]  | Bob    | White  | 111111  |   Off   |
…
[Delete] [Add]
function del() {
table.getSelection().forEach(row=> {
if (table.dataSource.length > 0) table.dataSource.removeAt(row)
})
table.selected = []
}
Thank u so much for your time in advance
Yavor Dashev