1.checkbox event:

function updateSelected(action, id) {    var idx = selected.indexOf(id);    if(action === 'add' && idx === -1) {        selected.push(id);    }    if(action === 'add' && idx === -1) {        selected.splice(idx, 1);    }}isSeleected = function (id) {    return selected.indexOf(id) >= 0;}updateSelection ($event, id) {    var checkbox = $event.target;    var action = (checkbox.checked ? "add" : "remove");    updateSelected(action, id);}

2.checkbox html:

     
    
      {
    {item.name}}