Sets or gets the value of the selected options.
Setting the value property sets the options with those values to be the selected options. You must set the value property to values that exist in the options list.
To reset the checkbox group to have no options selected, set the value property to an empty array.
Getting the value property returns the values of the currently selected options. If no value is selected, the value property returns an empty array.
Note: Changing an element's value in code does not trigger an onChange event.