js-confirm-confirm cancel dialog box

​​​​true;

            }else {
                              //alert("cancel"); -------------------


if(!window.confirm('All information under this column will be deleted')){
alert("You click Cancel");
return false;
}
alert("You clicked OK");

-------------------------- -----------------------

"onclick="return window.confirm('Do you really want to delete this questionnaire? All data in this questionnaire will be cleared and cannot be recovered!?')">Delete

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