src/utils/vnode.js
function addNativeNodeListener (node, eventName, handler) {
  if (isNullOrUndefined(node.data.on)) {
    node.data.on = {};
  }

  mergeVNodeListeners(node.data.on, eventName, handler);
}
function addNativeNodeListener (node, eventName, handler) {
  if (isNullOrUndefined(node.data.on)) {
    node.data.on = {};
  }

  mergeVNodeListeners(node.data.on, eventName, handler);
}
function addNativeNodeListener ( node , eventName , handler ) { if ( isNullOrUndefined ( node . data . on ) ) { node . data . on = { } ; } mergeVNodeListeners ( node . data . on , eventName , handler ) ; }
Adds a listener to a native HTML vnode.
Adds a listener to a native HTML vnode .