Function updateValueIfChanged

docs/external/js/react-dom.development.js:1890–1911

(node)

    node._valueTracker = trackValueOnNode(node);
  }
  function updateValueIfChanged(node) {
    if (!node) {
      return false;
    }

    var tracker = getTracker(node); // if there is no tracker at this point it's unlikely
    // that trying again will succeed

    if (!tracker) {
      return true;
    }

    var lastValue = tracker.getValue();
    var nextValue = getValueFromNode(node);

    if (nextValue !== lastValue) {
      tracker.setValue(nextValue);
      return true;
    }

    return false;
  }

  var didWarnValueDefaultValue = false;
  var didWarnCheckedDefaultChecked = false;