checkandupdateexample.ts

function (checkAndUpdate, viewData) {  
  var component = viewData.component;
  // here node index is 1 and property is `name`
  var currentValue_0 = component.name;
  checkAndUpdate(viewData, 1, 0, currentValue_0);

  // here node index is 4 and bound property is `age`
  var currentValue_1 = component.age;
  checkAndUpdate(viewData, 4, 0, currentValue_1);
});