import { TestElement , logNodeOp , NodeOpTypes } from './nodeOps' ; import { isOn } from '@vue/shared' ; export function patchProp ( el , key , prevValue , nextValue ) { logNodeOp ( { type : NodeOpTypes . PATCH , targetNode : el , propKey : key , propPrevValue : prevValue , propNextValue : nextValue } ) ; el . props [ key ] = nextValue ; if ( isOn ( key ) ) { const event = key . slice ( 2 ) . toLowerCase ( ) ; ( el . eventListeners || ( el . eventListeners = { } ) ) [ event ] = nextValue ; } }